JP4327334B2 - Heating control device, heat storage system, heating control method, and computer-readable recording medium recording a program for causing a computer to execute the method - Google Patents

Description

の算定式からカスケード暖房能力（ＱＨ１）および外気熱源暖房能力（ＱＨ２）を算定することになる。ただし、A11、B11、C11、A12、B12、C12、A13、B13、C13、A21、B21、C21、A22、B22、C22、A23、B23、C23は、所定の係数である。
【００５５】
つぎに、図１に示した暖房制御装置１００の暖房運転制御について説明する。図３は、図１に示した暖房制御装置１００の空調時間帯での暖房運転制御手順を示すフローチャートである。なお、この空調時間帯では、蓄熱槽温水暖房運転が行われているものとし、夜間に、熱源機１を運転して蓄熱槽２に蓄えた温水を温水ポンプ３によって、冷温水配管１０と水側三方弁５と冷温水配管１１とを通して直接負荷Ｘ側へ送水させているものとする。
【００５６】
同図に示すように、ＣＰＵ１０１は、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも低い場合には（ステップＳ３０１否定）、現在の槽内温度によるカスケード暖房能力を計算し（ステップＳ３０２）、続いて現在の外気温度による外気熱源暖房能力を計算する（ステップＳ３０３）。
【００５７】
その結果、カスケード暖房能力が外気熱源暖房能力よりも小さい場合には（ステップＳ３０４否定）、外気熱源暖房運転を行い（ステップＳ３０５）、カスケード暖房能力が外気熱源暖房能力よりも大きい場合には（ステップＳ３０４肯定）、カスケード暖房運転をおこなう（ステップＳ３０６）。なお、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも高い場合には（ステップＳ３０１肯定）、蓄熱槽温水暖房運転をおこなう（ステップＳ３０７）。
【００５８】
つぎに、図３のステップＳ３０７に示した蓄熱槽温水暖房の処理手順について説明する。図４は、図３のステップＳ３０７に示した蓄熱槽温水暖房の処理手順を示すフローチャートである。同図に示すように、蓄熱槽温水暖房をおこなう場合には、まず水側三方弁５を全開し（ステップＳ４０１）、ブライン側三方弁６を全閉する（ステップＳ４０２）。
【００５９】
その後、熱源機１に外気熱源暖房運転と同様に外気熱源を利用した運転（ステップＳ４０３）を行わせる。なお、水側三方弁５を全開としたのは蓄熱槽２の温水を負荷Ｘ側へ供給するためであり、ブライン側三方弁６を全閉としたのはブラインを循環させないためである。また、熱負荷Ｘ側を暖房するのに蓄熱槽２の温水の熱だけでは足りない場合は、熱源機１も外気熱源暖房にて追いかけ運転をおこなうようにしたため、特に、立ち上がり時のように熱負荷Ｘが低温で負荷が大きい場合にも対応することができる。
【００６０】
つぎに、図３のステップＳ３０６に示したカスケード暖房運転の処理手順について説明する。図５は、図３のステップＳ３０６に示したカスケード暖房運転の処理手順を示すフローチャートである。同図に示すように、かかるカスケード暖房運転をおこなう場合には、まず水側三方弁５を全閉した後（ステップＳ５０１）、熱源機ブライン入口温度センサ２１の感知する温度が設定した供給水設定温度になるようにブライン側三方弁６を制御する（ステップＳ５０２）。その後、熱源機１に蓄熱槽２の温水を熱源とした暖房運転を行わせる（ステップＳ５０３）。
【００６１】
カスケード暖房運転が選択される場合は、蓄熱槽２内の水温は供給水温よりも低いため、水側三方弁５を全閉として蓄熱槽２に温水を通さずに負荷Ｘ側へ直接供給する。したがって、蓄熱槽２の温水はブラインに熱を伝達させて熱源として利用することになる。また、ブライン温度は、蓄熱槽温度により変化するため、ブライン側三方弁６によりブライン配管１７のブラインとブライン配管１６のブラインを混合させて熱源機ブライン入口１８の温度を調節する。
【００６２】
つぎに、図３のステップＳ３０５に示した外気熱源暖房運転の処理手順について説明する。図６は、図３のステップＳ３０５に示した外気熱源暖房運転の処理手順を示すフローチャートである。同図に示すように、かかる外気熱源暖房運転をおこなう場合には、まず水側三方弁５を全閉し（ステップＳ６０１）、ブライン側三方弁６を全閉した後（ステップＳ６０２）、熱源機１に外気熱源暖房運転をおこなわせる（ステップＳ６０３）。
【００６３】
なお、水側三方弁５を全閉としたのは、蓄熱槽２の槽内水温は供給温度以下なので蓄熱槽２を通さずに熱負荷Ｘ側へ温水を供給することにより安定した温度で温水を供給するためである。また、ブライン側三方弁６を全閉としたのはブラインを循環させないためである。
【００６４】
上述してきたように、この実施の形態１では、周囲環境、負荷状況に応じた暖房能力によって最適制御を行って、外気熱源暖房運転とカスケード暖房運転との切り換えをおこなうよう構成したので、蓄熱槽の使用できる温度帯が広がり、従来の運転方法に比べ日量加熱能力の向上を図ることが可能となる。また、外気熱源暖房運転よりも瞬時暖房能力が高いカスケード暖房運転を選択して切り換えることができるようになるので、人手を介さずに瞬時暖房能力を増量することも可能となる。
【００６５】
実施の形態２．
ところで、上記実施の形態１では、暖房能力の大小によりカスケード暖房運転と外気熱源暖房運転を切り換えることとしたが、運転効率ηにより二つの運転方式を切り換えることもできる。そこで、本実施の形態２では、運転効率ηにより二つの運転方式を切り換える場合を示すこととする。なお、蓄熱システムのシステム系統並びに暖房制御装置１００のハードウエアは図１および図２に示すものと同様になるので、ここではその説明を省略する。
【００６６】
まず、図１に示した暖房制御装置１００によるカスケード暖房の運転効率（η１）および外気熱源暖房の運転効率（η２）の算定要領について説明する。ブライン出口温度をＴｂ（℃）とし、温水出口温度をＴｗ（℃）とし、外気温度をＴａ（℃）とし、カスケード暖房消費電力をＰ１（kW）とし、外気熱源暖房消費電力をＰ２（kW）とすると、
【００６７】

の算定式からカスケード暖房の運転効率（η１）および外気熱源暖房の運転効率（η２）を算定することができる。ただし、A31、B31、C31、A32、B32、C32、A33、B33、C33、A41、B41、C41、A42、B42、C42、A43、B43、C43は、所定の係数である。
【００６８】
つぎに、本実施の形態２にかかる暖房制御装置１００の暖房運転制御について説明する。図７は、本実施の形態２にかかる暖房制御装置１００の空調時間帯での暖房運転制御手順を示すフローチャートである。なお、この空調時間帯では、蓄熱槽温水暖房運転が行われているものとする。同図に示すように、ＣＰＵ１０１は、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも低い場合には（ステップＳ７０１否定）、現在の槽内温度によるカスケード暖房の運転効率を計算し（ステップＳ７０２）、続いて現在の外気温度による外気熱源暖房の運転効率を計算する（ステップＳ７０３）。
【００６９】
その結果、カスケード暖房の運転効率が外気熱源暖房の運転効率よりも小さい場合には（ステップＳ７０４否定）、外気熱源暖房運転を行い（ステップＳ７０５）、カスケード暖房能力が外気熱源暖房能力よりも大きい場合には（ステップＳ７０４肯定）、カスケード暖房運転をおこなう（ステップＳ７０６）。また、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも高い場合には（ステップＳ７０１肯定）、蓄熱槽温水暖房運転をおこなう（ステップＳ７０７）。なお、蓄熱槽温水暖房運転、カスケード暖房および外気熱源暖房運転の処理手順は、それぞれ図４〜図６に示すものと同様である。
【００７０】
上述してきたように、この実施の形態２では、周囲環境・負荷状況に応じた運転効率によって最適制御を行って、外気熱源暖房運転とカスケード暖房運転との切り換えをおこなうよう構成したので、蓄熱槽の使用できる温度帯が広がり、従来の運転方法に比べ運転効率の向上を図ることが可能となる。
【００７１】
実施の形態３．
ところで、上記実施の形態１では、暖房能力に基づいて外気熱源暖房運転とカスケード暖房運転との切り換えをおこない、実施の形態２では、運転効率に基づいて外気熱源暖房運転とカスケード暖房運転との切り換えをおこなうこととしたが、これらの暖房能力および運転効率を組み合わせて外気熱源暖房運転とカスケード暖房運転との切り換えをおこなうこともできる。
【００７２】
そこで、この実施の形態３では、暖房能力および運転効率を組み合わせて外気熱源暖房運転とカスケード暖房運転との切り換えをおこなう場合について説明する。なお、蓄熱システムのシステム系統並びに暖房制御装置１００のハードウエアは図１および図２に示すものと同様になるので、ここではその説明を省略する。
【００７３】
図８は、本実施の形態３にかかる暖房制御装置１００の空調時間帯での暖房運転制御手順を示すフローチャートである。なお、この空調時間帯では、蓄熱槽温水暖房運転が行われているものとする。同図に示すように、ＣＰＵ１０１は、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも低い場合には（ステップＳ８０１否定）、暖房能力優先か運転効率優先かを判断して能力優先の場合には（ステップＳ８０２，能力優先）、現在の槽内温度によるカスケード暖房能力を計算し（ステップＳ８０３）、続いて現在の外気温度による外気熱源暖房能力を計算する（ステップＳ８０４）。
【００７４】
そして、カスケード暖房能力が外気熱源暖房能力よりも小さい場合には（ステップＳ８０５否定）、外気熱源暖房運転を行い（ステップＳ８０８）、カスケード暖房能力が外気熱源暖房能力よりも大きい場合には（ステップＳ８０５肯定）、カスケード暖房運転をおこなう（ステップＳ８０９）。また、暖房能力優先か運転効率優先かを判断して運転効率優先の場合には（ステップＳ８０２，運転効率優先）、現在の槽内温度によるカスケード暖房運転効率を計算し（ステップＳ８０６）、続いて現在の外気温度による外気熱源暖房運転効率を計算する（ステップＳ８０７）。
【００７５】
そして、カスケード暖房運転効率が外気熱源暖房運転効率よりも小さい場合には（ステップＳ８０７否定）、外気熱源暖房運転を行い（ステップＳ８０８）、カスケード暖房運転効率が外気熱源暖房運転効率よりも大きい場合には（ステップＳ８０７肯定）、カスケード暖房運転をおこなう（ステップＳ８０９）。なお、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも高い場合には（ステップＳ８０１肯定）、蓄熱槽温水暖房運転をおこなう（ステップＳ８１０）。
【００７６】
上述してきたように、この実施の形態３によれば、周囲環境・負荷状況に応じた暖房能力または運転効率によって最適制御を行って、外気熱源暖房運転とカスケード暖房運転との切り換えをおこなうようにしたことで、蓄熱槽の使用できる温度帯が広がるため、従来の運転方法に比べ運転効率の向上を図ることが可能になる。
【００７７】
なお、上記実施の形態１〜３では、カスケード暖房と外気熱源暖房の暖房能力または運転効率を比較した後に、いずれかの暖房運転をおこなうこととしたが、本発明はこれに限定されるものではなく、槽内温度が供給水温未満と判断した時点で直ちに暖房運転を開始するよう構成することもできる。
【００７８】
たとえば、暖房能力によって外気熱源暖房運転とカスケード暖房運転との切り換えをおこなう場合には、図９に示すように、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも低い場合には（ステップＳ９０１否定）、カスケード暖房運転を開始し（ステップＳ９０２）、現在の槽内温度によるカスケード暖房能力を計算し（ステップＳ９０３）、続いて現在の外気温度による外気熱源暖房能力を計算する（ステップＳ９０４）。
【００７９】
そして、カスケード暖房能力が外気熱源暖房能力よりも小さい場合には（ステップＳ９０５否定）、カスケード暖房運転を停止して外気熱源暖房運転を行い（ステップＳ９０６）、カスケード暖房能力が外気熱源暖房能力よりも大きい場合には（ステップＳ９０５否定）、カスケード暖房運転を続行する（ステップＳ９０７）。なお、蓄熱槽２の温水の温度（槽内温度）が供給水温よりも高い場合には（ステップＳ９０１肯定）、蓄熱槽温水暖房運転をおこなうことになる（ステップＳ９０８）。
【００８０】
【発明の効果】
以上説明したように、この発明によれば、蓄熱槽内の第１の熱伝達媒体の温度並びに外気熱源暖房運転手段およびカスケード暖房運転手段の特性に基づいて、制御手段が外気熱源暖房運転手段またはカスケード暖房運転手段を切り換え制御するよう構成したので、効率良く外気熱源暖房運転手段またはカスケード暖房運転手段を切り換え、もって外気温度、蓄熱槽内水温または現地負荷状況に柔軟に対応することが可能な暖房制御装置が得られるという効果を奏する。
【００８１】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度が所定の温度以上である場合には、直接暖房運転手段に切り換え制御するよう構成したので、蓄熱槽内の温度を有効利用することが可能な暖房制御装置が得られるという効果を奏する。
【００８２】
つぎの発明によれば、外気熱源暖房運転手段の暖房能力およびカスケード暖房運転手段の暖房能力を比較して、暖房能力のより高い外気熱源暖房運転手段またはカスケード暖房運転手段に切り換え制御するよう構成したので、より暖房能力の高い暖房運転手段を用いて暖房をおこなうことが可能な暖房制御装置が得られるという効果を奏する。
【００８３】
つぎの発明によれば、外気熱源暖房運転手段の運転効率およびカスケード暖房運転手段の運転効率を比較して、運転効率のより高い外気熱源暖房運転手段またはカスケード暖房運転手段に切り換え制御するよう構成したので、より運転効率の高い暖房運転手段を用いて暖房をおこなうことが可能な暖房制御装置が得られるという効果を奏する。
【００８４】
つぎの発明によれば、暖房能力に基づいて切り換えをおこなう第１の切換手段若しくは運転効率に基づいて切り換えをおこなう第２の切換手段のいずれか一方を選択するよう構成したので、暖房能力または運転効率に基づく暖房運転をおこなうことが可能な暖房制御装置が得られるという効果を奏する。
【００８５】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度並びに外気温度に基づいて外気熱源暖房運転手段の暖房能力を算定し、蓄熱槽内の第１の熱伝達媒体の温度並びに熱交換器から出力される第２の熱伝達媒体の温度に基づいてカスケード暖房運転手段の暖房能力を算定するよう構成したので、各運転手段の暖房能力を効率良く算定することが可能な暖房制御装置が得られるという効果を奏する。
【００８６】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度並びに外気温度に基づいて外気熱源暖房運転手段の運転効率を算定し、蓄熱槽内の第１の熱伝達媒体の温度並びに熱交換器から出力される第２の熱伝達媒体の温度に基づいてカスケード暖房運転手段の運転効率を算定するよう構成したので、各運転手段の運転効率を効率良く算定することが可能な暖房制御装置が得られるという効果を奏する。
【００８７】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度並びに外気熱源暖房運転およびカスケード暖房運転の特性に基づいて、外気熱源暖房運転手段またはカスケード暖房運転手段を切り換え制御するよう構成したので、効率良く外気熱源暖房運転またはカスケード暖房運転を切り換え、もって外気温度、蓄熱槽内水温または現地負荷状況に柔軟に対応することが可能な暖房制御方法が得られるという効果を奏する。
【００８８】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度が所定の温度以上である場合には、直接暖房運転に切り換え制御するよう構成したので、蓄熱槽内の温度を有効利用することが可能な暖房制御方法が得られるという効果を奏する。
【００８９】
つぎの発明によれば、外気熱源暖房運転の暖房能力およびカスケード暖房運転の暖房能力を比較して、暖房能力のより高い外気熱源暖房運転またはカスケード暖房運転に切り換え制御するよう構成したので、より暖房能力の高い暖房運転を用いて暖房をおこなうことが可能な暖房制御方法が得られるという効果を奏する。
【００９０】
つぎの発明によれば、外気熱源暖房運転の運転効率およびカスケード暖房運転の運転効率を比較して、運転効率のより高い外気熱源暖房運転またはカスケード暖房運転に切り換え制御するよう構成したので、より運転効率の高い暖房運転を用いて暖房をおこなうことが可能な暖房制御方法が得られるという効果を奏する。
【００９１】
つぎの発明によれば、外気熱源暖房運転およびカスケード暖房運転の暖房能力若しくは運転効率のいずれか一方に基づいて、暖房能力または運転効率のより高い外気熱源暖房運転またはカスケード暖房運転に切り換えるよう構成したので、暖房能力または運転効率に基づく暖房運転をおこなうことが可能な暖房制御方法が得られるという効果を奏する。
【００９２】
つぎの発明によれば、蓄熱槽内の第１の伝達媒体の温度並びに外気温度に基づいて外気熱源暖房運転の暖房能力を算定し、蓄熱槽内の第１の熱伝達媒体の温度並びに熱交換器から出力される第２の熱伝達媒体の温度に基づいてカスケード暖房運転の暖房能力を算定するよう構成したので、各運転手段の暖房能力を効率良く算定することが可能な暖房制御方法が得られるという効果を奏する。
【００９３】
つぎの発明によれば、蓄熱槽内の第１の熱伝達媒体の温度並びに外気温度に基づいて外気熱源暖房運転の運転効率を算定し、蓄熱槽内の第１の熱伝達媒体の温度並びに熱交換器から出力される第２の熱伝達媒体の温度に基づいてカスケード暖房運転の運転効率を算定するよう構成したので、各運転の運転効率を効率良く算定することが可能な暖房制御方法が得られるという効果を奏する。
【００９４】
つぎの発明によれば、上記方法のいずれか一つに記載された方法をコンピュータに実行させるプログラムを記録したことで、そのプログラムを機械読み取り可能となり、これによって、上記方法のいずれか一つの動作をコンピュータによって実現することが可能な記録媒体が得られるという効果を奏する。
【００９５】
つぎの発明によれば、上記の暖房制御装置を備える構成としたので、最適な自動暖房運転をおこなうことが可能な蓄熱システムが得られるという効果を奏する。
【００９６】
つぎの発明によれば、上記の記録媒体を備える構成としたので、これにより、上記方法のいずれか一つの動作をコンピュータによって実現することが可能な蓄熱システムが得られるという効果を奏する。
【図面の簡単な説明】
【図１】 本実施の形態１で用いる蓄熱システムの構成を示すシステム系統図である。
【図２】 図１に示した暖房制御装置のハードウェア構成を示すブロック図である。
【図３】 実施の形態１にかかる暖房運転制御手順を示すフローチャートである。
【図４】 蓄熱槽温水暖房運転の処理手順を示すフローチャートである。
【図５】 カスケード暖房運転の処理手順を示すフローチャートである。
【図６】 外気熱源暖房運転の処理手順を示すフローチャートである。
【図７】 実施の形態２にかかる暖房運転制御手順を示すフローチャートである。
【図８】 実施の形態３にかかる暖房運転制御手順を示すフローチャートである。
【図９】 暖房運転制御手順の変形例を示すフローチャートである。
【図１０】 カスケード暖房運転と外気熱源暖房運転の暖房能力を説明するための図である。
【符号の説明】
１ 熱源機、２ 蓄熱槽、３ 冷温水ポンプ、４ ブラインポンプ、５ 水側三方弁、６ ブライン側三方弁、７ 熱源機冷温水出口、８ 冷温水配管、９ 冷温水配管、１０ 冷温水配管、１１ 冷温水配管、１２ 冷温水配管、１３ 熱源機冷温水入口、１４ 熱源機ブライン出口、１５ ブライン配管、１６ ブライン配管、１７ ブライン配管、１８ 熱源機ブライン入口、１９ 蓄熱槽温度センサ、２０ 供給水温センサ、２１ 熱源機ブライン入口温度センサ、２２熱源機ブライン出口温度センサ、２３熱源機冷温水出口温度センサ。[0001]
BACKGROUND OF THE INVENTION
The present invention provides a heating control device, a heat storage system, a heating control method, and a program for causing a computer to execute the method for supplying the heat amount of the heat transfer medium stored in the heat storage tank to the heat load to perform heating control of the heat load. The present invention relates to a recorded computer-readable recording medium.
[0002]
[Prior art]
Conventionally, there has been known a heat storage system that stores hot water or the like in a heat storage tank in advance and supplies the hot water in the heat storage tank to a heat load to perform heating control of the heat load. The hot water heated by the machine is stored in a heat storage tank, and the hot water in the heat storage tank is directly supplied to the heat load in the daytime.
[0003]
By the way, when the temperature of the heat storage tank becomes equal to or lower than the load side supply temperature of, for example, 45 ° C., the heat stored in the heat storage tank cannot be used. Often done.
[0004]
Here, the outside air heat source heating operation is to supply hot water heated by the heat source unit to the heat load via the heat storage tank when the water temperature of the heat storage tank is lowered. Cascade heating operation refers to operating a heat source device at night to store hot water in a heat storage tank and performing heating operation while exchanging heat using the hot water stored in the heat storage tank as a heat source during the daytime.
[0005]
This cascade heating operation does not directly transfer the hot water in the heat storage tank to the heat load, so the night shift rate can be increased, but hot water stored in the heat storage tank at night is used as a heat source to reheat the hot water in the daytime. Since it is remade, there is a characteristic that efficiency becomes slightly worse.
[0006]
As described above, when such an outside air heat source heating operation or cascade heating operation is used, it is possible to cope with a decrease in the water temperature in the heat storage tank immediately or in advance.
[0007]
[Problems to be solved by the invention]
However, since the outdoor heat source heating operation and the cascade heating operation differ in the heating capacity depending on the outdoor air temperature, the water temperature in the heat storage tank, and the local load situation, it is optimal for either the outdoor air heat source heating operation or the cascade heating operation. There is a problem that heating operation cannot be performed.
[0008]
FIG. 10 is an explanatory diagram for explaining the heating capacity of the cascade heating operation and the outside heat source heating operation. The horizontal axis shown in the figure represents the temperature (° C.) of hot water in the heat storage tank, and the vertical axis represents the heating capacity (kW). In addition, α shown in the figure indicates the heating capacity change during cascade heating operation due to the water temperature change in the heat storage tank, and β, γ, and δ shown in the figure are the outside air temperatures of 7 ° C., 0 ° C., − The heating capacity change of the outside air heat source heating operation at 5 ° C. is shown.
[0009]
From this graph, it can be seen that the heating capacity when the outside air temperature is high and the water temperature in the heat storage tank is low is larger in the outside air source heating operation than in the cascade heating operation.
[0010]
That is, in the cascade heating operation, when the temperature of the heat storage tank is high, the heating capacity of the cascade heating operation is larger than the heating capacity of the outside air heat source heating, but when the operation time elapses and the water temperature in the heat storage tank decreases The heating capacity of the outside heat source heating is larger than the heating capacity of the cascade heating operation.
[0011]
As described above, it is an extremely important issue how to realize the optimum automatic heating operation without human intervention in consideration of the characteristics of the cascade heating operation and the outside air heat source heating.
[0012]
The present invention has been made in order to solve the above-described problems caused by the prior art, and is based on the characteristics of the cascade heating operation and the outside air heat source heating that change depending on the outside air temperature, the heat storage tank water temperature, the local load situation, and the like. Therefore, it is possible to obtain a heating control device, a heat storage system, a heating control method, and a computer-readable recording medium in which a program for causing a computer to execute the method is recorded, which can perform optimum automatic heating operation without human intervention. Objective.
[0013]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve the object, the heating control device according to the present invention supplies the heat amount of the first heat transfer medium stored in the heat storage tank to the heat load and performs heating control of the heat load. In the heating control apparatus, an outside air source heating operation means for supplying the heat load of the first heat transfer medium to the heat load while storing the first heat transfer medium heated by the outside air heat source in the heat storage tank, and a heat exchanger , A cascade heating operation means for exchanging heat of the first heat transfer medium to the second heat transfer medium and supplying the heat quantity of the second heat transfer medium to the heat load, and a first in the heat storage tank Control means for switching and controlling the outside air heat source heating operation means or the cascade heating operation means based on the temperature of the heat transfer medium and the characteristics of the outside air heat source heating operation means and the cascade heating operation means. You .
[0014]
According to this invention, the control means switches between the outside heat source heating operation means or the cascade heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the characteristics of the outside air heat source heating operation means and the cascade heating operation means. Since the control is performed, the outside heat source heating operation means or the cascade heating operation means can be switched efficiently.
[0015]
The heating control apparatus according to the next invention further comprises direct heating operation means for directly supplying the heat amount of the first heat transfer medium in the heat storage tank to the heat load in the above invention, When the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than a predetermined temperature, switching control is performed to the direct heating operation means.
[0016]
According to the present invention, when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than the predetermined temperature, the control means directly controls to switch to the heating operation means. Can be used effectively.
[0017]
In the heating control apparatus according to the next invention, in the above invention, the control means compares the heating capacity of the outside air heat source heating operation means and the heating capacity of the cascade heating operation means, and the outside air source heating with higher heating capacity is performed. It is characterized by switching control to operation means or cascade heating operation means.
[0018]
According to this invention, the control means compares the heating capacity of the outside air heat source heating operation means and the heating capacity of the cascade heating operation means, and performs switching control to the outside air source heating operation means or the cascade heating operation means having a higher heating capacity. Therefore, it is possible to perform heating using a heating operation means with higher heating capacity.
[0019]
In the heating control apparatus according to the next invention, in the above invention, the control means compares the operating efficiency of the outside air heat source heating operation means and the operation efficiency of the cascade heating operation means, and the outside air source heating with higher operating efficiency. It is characterized by switching control to operation means or cascade heating operation means.
[0020]
According to this invention, the control means compares the operation efficiency of the outside air heat source heating operation means and the operation efficiency of the cascade heating operation means, and performs switching control to the outside air source heating operation means or the cascade heating operation means having higher operation efficiency. Therefore, heating can be performed using a heating operation means with higher operating efficiency.
[0021]
In the heating control apparatus according to the next invention, in the above invention, the control means compares the heating capacity of the outside air heat source heating operation means and the heating capacity of the cascade heating operation means, and the outside air source heating with higher heating capacity is performed. Comparing the operating efficiency of the first switching means for switching to the operating means or the cascade heating operating means with the operating efficiency of the outdoor air source heating operating means and the operating efficiency of the cascade heating operating means, the outdoor air source heating operating means or cascade having higher operating efficiency The second switching means for switching to the heating operation means, and the switching selection means for selecting either the first switching means or the second switching means.
[0022]
According to the present invention, the switching selection means selects either the first switching means that switches based on the heating capacity or the second switching means that switches based on the operating efficiency. Heating operation based on the heating capacity or operation efficiency can be performed.
[0023]
In the heating control apparatus according to the next invention, in the above invention, the first switching unit is configured to heat the outside air heat source heating operation unit based on the temperature of the first heat transfer medium and the outside air temperature in the heat storage tank. The cascade heating operation means based on the first calculation means for calculating the capacity, the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger. And a second calculating means for calculating the heating capacity.
[0024]
According to this invention, the first calculating means calculates the heating capacity of the outside air heat source heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, and the second calculating means is the heat storage tank. Because the heating capacity of the cascade heating operation means is calculated based on the temperature of the first heat transfer medium in the first heat transfer medium and the temperature of the second heat transfer medium output from the heat exchanger, the heating capacity of each operation means Can be calculated efficiently.
[0025]
In the heating control apparatus according to the next invention, in the above invention, the second switching means operates the outside air heat source heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature. The cascade heating operation means based on the third calculating means for calculating the efficiency and the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger. And a fourth calculating means for calculating operating efficiency.
[0026]
According to this invention, the third calculation means calculates the operating efficiency of the outside heat source heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, and the fourth calculation means includes: Since the operation efficiency of the cascade heating operation means is calculated based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger, The operation efficiency can be calculated efficiently.
[0027]
The heating control method according to the next invention is a heating control method in which the amount of heat of the first heat transfer medium stored in the heat storage tank is supplied to the heat load to control the heating of the heat load. The heat quantity of the first heat transfer medium is stored in the heat storage tank while the amount of heat of the first heat transfer medium is stored in the heat storage tank while the amount of heat of the first heat transfer medium is supplied to the heat load by the outside heat source heating operation or heat exchanger. Either one of the cascade heating operations in which heat is exchanged with the transfer medium and the amount of heat of the second heat transfer medium is supplied to the heat load is the temperature of the first heat transfer medium in the heat storage tank and the outside air heat source heating operation. And switching control based on the characteristics of the cascade heating operation.
[0028]
According to the present invention, the outside air heat source heating operation means or the cascade heating operation means is controlled to be switched based on the temperature of the first heat transfer medium in the heat storage tank and the characteristics of the outside air heat source heating operation and the cascade heating operation. Therefore, the outdoor air heat source heating operation or the cascade heating operation can be switched efficiently.
[0029]
In the heating control method according to the next invention, in the above invention, when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than a predetermined temperature, the first heat transfer medium in the heat storage tank. The amount of heat is controlled by switching to direct heating operation for directly supplying the heat load to the heat load.
[0030]
According to the present invention, when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than the predetermined temperature, the control is switched to the direct heating operation, so the temperature in the heat storage tank is effectively used. be able to.
[0031]
In the heating control method according to the next invention, in the above invention, the heating capacity of the outside air heat source heating operation and the heating capacity of the cascade heating operation are compared, and the heating control method is switched to the outside air source heating operation or the cascade heating operation having a higher heating capacity. It is characterized by controlling.
[0032]
According to the present invention, the heating capacity of the outdoor air heat source heating operation and the heating capacity of the cascade heating operation are compared, and the switching control is performed to the outdoor air heat source heating operation or the cascade heating operation having a higher heating capacity. Heating can be performed using a high heating operation.
[0033]
In the heating control method according to the next invention, in the above invention, the operation efficiency of the outside air heat source heating operation and the operation efficiency of the cascade heating operation are compared, and the operation is switched to the outside air source heating operation or the cascade heating operation having a higher operation efficiency. It is characterized by controlling.
[0034]
According to the present invention, the operation efficiency of the outside air heat source heating operation and the operation efficiency of the cascade heating operation are compared, and the control is switched to the outside air heat source heating operation or the cascade heating operation having a higher operation efficiency. Heating can be performed using a high heating operation.
[0035]
The heating control method according to the next invention is the above-described invention, wherein the outside air heat source heating operation with higher heating capacity or operation efficiency is performed based on either the heating capacity or the operating efficiency of the outside air source heating operation and the cascade heating operation. Or it switches to cascade heating operation, It is characterized by the above-mentioned.
[0036]
According to the present invention, based on either the heating capacity or the operating efficiency of the outdoor air heat source heating operation and the cascade heating operation, the switching to the outdoor air heat source heating operation or the cascade heating operation with higher heating capacity or operating efficiency is performed. The heating operation based on the heating capacity or the operation efficiency can be performed.
[0037]
In the heating control method according to the next invention, in the above invention, a first calculation step of calculating a heating capacity of the outside air heat source heating operation based on a temperature of the first heat transfer medium in the heat storage tank and an outside air temperature. And a second calculation step of calculating the heating capacity of the cascade heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger. It is characterized by including.
[0038]
According to the present invention, in the first calculation step, the heating capacity of the outside air heat source heating operation is calculated based on the temperature of the first transmission medium in the heat storage tank and the outside air temperature, and in the second calculation step, the heating capacity in the heat storage tank is calculated. Since the heating capacity of the cascade heating operation is calculated on the basis of the temperature of the first heat transfer medium and the temperature of the second heat transfer medium output from the heat exchanger, the heating capacity of each operation means is efficiently improved. Can be calculated.
[0039]
In the heating control method according to the next invention, in the above invention, a third calculation step of calculating the operating efficiency of the outside air heat source heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature. And a fourth calculation step of calculating the operating efficiency of the cascade heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger It is characterized by including.
[0040]
According to this invention, in the third calculation step, the operating efficiency of the outside air heat source heating operation is calculated based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, and in the fourth calculation step, the heat storage Since the operation efficiency of the cascade heating operation is calculated based on the temperature of the first heat transfer medium in the tank and the temperature of the second heat transfer medium output from the heat exchanger, the operation efficiency of each operation is It can be calculated efficiently.
[0041]
The recording medium according to the next invention records a program for causing a computer to execute the above method, so that the program can be read by a machine, and thereby any one operation of the above method can be realized by the computer. .
[0042]
A heat storage system according to the next invention is characterized by including the above-described heating control device. Thereby, the thermal storage system which can perform optimal automatic heating operation can be obtained.
[0043]
A heat storage system according to the next invention includes the recording medium described above. Thereby, the thermal storage system which can implement | achieve any one operation | movement of the said method with a computer can be obtained.
[0044]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION Exemplary embodiments of a heating control device, a heat storage system, a heating control method, and a computer-readable recording medium storing a program that causes a computer to execute the method will be described in detail with reference to the accompanying drawings. Explained.
[0045]
Embodiment 1 FIG.
First, the system system of the heat storage system used in the first embodiment will be described. FIG. 1 is a system diagram of a heat storage system used in the first embodiment. In the figure, 1 is a heat source device including a heat exchanger 1a for cold / hot water and a heat exchanger 1b for brine, 2 is a heat storage tank for storing hot water, 3 is a cold / hot water pump for flowing hot water toward the load X side, 4 is a brine pump for flowing brine, 5 is a water-side three-way valve, 6 is a brine-side three-way valve, 7 is a heat source machine cold / hot water outlet, 8 is cold / hot water piping, 9 is cold / hot water piping, 10 is cold / hot water piping, 11 is a cold / hot water pipe, 12 is a cold / hot water pipe, 13 is a heat source machine cold / hot water inlet, 14 is a heat source machine brine outlet, 15 is a brine pipe, 16 is a brine pipe, 17 is a brine pipe, 18 is a heat source machine brine inlet, 19 Is a heat storage tank temperature sensor, 20 is a supply water temperature sensor, 21 is a heat source machine brine inlet temperature sensor, 22 is a heat source machine brine outlet temperature sensor, 23 is a heat source machine cold / hot water outlet temperature sensor, and 100 is a heating control device.
[0046]
This heat storage system is configured to appropriately supply hot water to the load X side and perform heating on the load X side by heat storage tank hot water heating operation, cascade heating operation, or outside air heat source heating operation. At night, the heat source unit 1 is operated and hot water is stored in the heat storage tank 2. The stored hot water is directly fed to the load X side by the cold / hot water pump 3 through the cold / hot water pipe 10, the water-side three-way valve 5, and the cold / hot water pipe 11 in the air conditioning time zone.
[0047]
Here, when the temperature of the heat storage tank 2 becomes equal to or lower than the supply water temperature, cascade heating is performed. The brine discharged from the heat source unit brine outlet 14 is heated by the hot water in the heat storage tank 2 and returned to the heat source unit brine inlet 18. In the heat source unit 1, heat is transferred from the brine heat exchanger 1b to the cold / hot water heat exchanger 1a side. To increase the temperature of water flowing from the load X side to make hot water.
[0048]
At this time, in order to prevent the temperature of the heat source unit brine inlet 18 from becoming too high, the brine side three-way valve 6 mixes a low temperature brine passing through the brine piping 16 and a high temperature brine passing through the brine piping 17. Adjust brine temperature at brine inlet 18. The hot water produced by cascade heating in the heat source unit 1 is supplied to the load X side through the heat source unit cold / hot water outlet 7, the cold / hot water pipe 8, the water side three-way valve 5, the cold / hot water pump 3, and the cold / hot water pipe 11. The Moreover, the capability of the cascade heating operation in the environment and the capability of the outdoor air heat source heating operation are compared based on the outside air temperature and the heat storage tank temperature, and the operation method with the higher heating ability is switched.
[0049]
As described above, this heat storage system is configured so that the heat storage tank hot water heating operation, the cascade heating operation, and the outside air heat source heating operation are used together, and the heating control device 100 can optimally switch the heating operation. In accordance with the heating capacity or operating efficiency that varies depending on the outside air temperature, the heat storage tank water temperature and the local load situation, etc., determine whether the heat storage tank hot water heating operation, the outside air source heating operation, or the cascade heating operation is optimal. Switching control is performed.
[0050]
Next, the hardware configuration of the heating control apparatus 100 shown in FIG. 1 will be described. FIG. 2 is a block diagram showing a hardware configuration of the heating control apparatus 100 shown in FIG. In FIG. 2, the heating control apparatus 100 includes a CPU 101, a ROM 102, and a RAM 103, a heat storage tank temperature sensor 19, a supplied water temperature sensor 20, a heat source machine brine inlet temperature sensor 21, a heat source machine brine outlet temperature sensor 22, and a heat source machine cold / hot water outlet. The sensor value (temperature) of each sensor of the temperature sensor 23 and the outside air temperature sensor 24 is detected.
[0051]
The CPU 101 executes a program stored in the ROM 102 or the RAM 103, so that the operations of the heat source unit 1, the cold / hot water pump 3, the brine pump 4, the water side three-way valve 5, and the brine side three-way valve 6 are performed based on each sensor value. To control.
[0052]
Next, the calculation points of the cascade heating capacity and the outside air heat source heating capacity by the heating control apparatus 100 shown in FIG. 1 will be described. In this heating control apparatus 100, the outside air temperature and the tank temperature are sampled at regular intervals, and the cascade heating capacity (QH1) and the outside air heat source heating capacity (QH2) are calculated based on the following formulas.
[0053]
Specifically, when the brine outlet temperature is Tb (° C.), the hot water outlet temperature is Tw (° C.), and the outside air temperature is Ta (° C.),
[0054]

Thus, the cascade heating capacity (QH1) and the outside air heat source heating capacity (QH2) are calculated from the above formula. However, A11, B11, C11, A12, B12, C12, A13, B13, C13, A21, B21, C21, A22, B22, C22, A23, B23, and C23 are predetermined coefficients.
[0055]
Next, the heating operation control of the heating control apparatus 100 shown in FIG. 1 will be described. FIG. 3 is a flowchart showing a heating operation control procedure in the air-conditioning time zone of the heating control apparatus 100 shown in FIG. In this air conditioning time zone, it is assumed that the heat storage tank hot water heating operation is performed, and the hot water stored in the heat storage tank 2 by operating the heat source unit 1 at night is cooled by the hot water pump 3 and the water. It is assumed that water is directly fed to the load X side through the side three-way valve 5 and the cold / hot water pipe 11.
[0056]
As shown in the figure, when the temperature of the hot water in the heat storage tank 2 (temperature in the tank) is lower than the supply water temperature (No in step S301), the CPU 101 calculates the cascade heating capacity based on the current temperature in the tank ( Step S302), and then the outside heat source heating capacity according to the current outside temperature is calculated (Step S303).
[0057]
As a result, when the cascade heating capability is smaller than the outside air source heating capability (No at Step S304), the outside air source heating operation is performed (Step S305), and when the cascade heating capability is larger than the outside air source heating capability (Step S304). (Yes in S304), cascade heating operation is performed (step S306). In addition, when the temperature of the hot water in the heat storage tank 2 (temperature in the tank) is higher than the supply water temperature (Yes in step S301), the heat storage tank hot water heating operation is performed (step S307).
[0058]
Next, the processing procedure of the heat storage tank hot water heating shown in step S307 of FIG. 3 will be described. FIG. 4 is a flowchart showing a processing procedure of the heat storage tank hot water heating shown in step S307 of FIG. As shown in the figure, when performing heat storage tank hot water heating, the water side three-way valve 5 is first fully opened (step S401), and the brine side three-way valve 6 is fully closed (step S402).
[0059]
Thereafter, the heat source unit 1 is caused to perform an operation using the outside air heat source (step S403) in the same manner as the outside air heat source heating operation. The reason why the water-side three-way valve 5 is fully opened is to supply hot water in the heat storage tank 2 to the load X side, and the reason that the brine-side three-way valve 6 is fully closed is that the brine is not circulated. In addition, when only the heat of the hot water in the heat storage tank 2 is not enough to heat the heat load X side, the heat source unit 1 is also chasing with the outside air heat source heating, so that it is particularly It is possible to cope with a case where the load X is low temperature and the load is large.
[0060]
Next, the processing procedure of the cascade heating operation shown in step S306 of FIG. 3 will be described. FIG. 5 is a flowchart showing a processing procedure of the cascade heating operation shown in step S306 of FIG. As shown in the figure, when performing such cascade heating operation, first, the water-side three-way valve 5 is fully closed (step S501), and then the supply water setting in which the temperature sensed by the heat source unit brine inlet temperature sensor 21 is set. The brine side three-way valve 6 is controlled to reach the temperature (step S502). Thereafter, the heat source apparatus 1 is caused to perform a heating operation using the hot water in the heat storage tank 2 as a heat source (step S503).
[0061]
When cascade heating operation is selected, since the water temperature in the heat storage tank 2 is lower than the supply water temperature, the water side three-way valve 5 is fully closed and the heat storage tank 2 is supplied directly to the load X side without passing hot water. Therefore, the hot water in the heat storage tank 2 transmits heat to the brine and is used as a heat source. Further, since the brine temperature varies depending on the temperature of the heat storage tank, the brine in the brine piping 17 and the brine in the brine piping 16 are mixed by the brine side three-way valve 6 to adjust the temperature of the heat source unit brine inlet 18.
[0062]
Next, the processing procedure of the outside air heat source heating operation shown in step S305 of FIG. 3 will be described. FIG. 6 is a flowchart showing a processing procedure of the outside air heat source heating operation shown in step S305 of FIG. As shown in the figure, when performing this outdoor air heat source heating operation, first, the water-side three-way valve 5 is fully closed (step S601), the brine-side three-way valve 6 is fully closed (step S602), and then the heat source machine. 1 is made to perform the outside air heat source heating operation (step S603).
[0063]
The water-side three-way valve 5 is fully closed because the water temperature in the heat storage tank 2 is lower than the supply temperature, and hot water is supplied at a stable temperature by supplying hot water to the heat load X side without passing through the heat storage tank 2. It is for supplying. The reason why the brine side three-way valve 6 is fully closed is that the brine is not circulated.
[0064]
As described above, in the first embodiment, since the optimum control is performed by the heating capacity according to the surrounding environment and the load condition, and the switching between the outdoor heat source heating operation and the cascade heating operation is performed, the heat storage tank The usable temperature range is expanded, and the daily heating capacity can be improved as compared with the conventional operation method. Moreover, since it becomes possible to select and switch the cascade heating operation, which has a higher instantaneous heating capability than the outside air heat source heating operation, it is possible to increase the instantaneous heating capability without human intervention.
[0065]
Embodiment 2. FIG.
In the first embodiment, the cascade heating operation and the outside air heat source heating operation are switched depending on the heating capacity, but the two operation methods can be switched depending on the operation efficiency η. Therefore, in the second embodiment, a case where the two operation methods are switched depending on the operation efficiency η is shown. The system system of the heat storage system and the hardware of the heating control device 100 are the same as those shown in FIG. 1 and FIG.
[0066]
First, the calculation point of the operation efficiency (η1) of the cascade heating and the operation efficiency (η2) of the outside air heat source heating by the heating control apparatus 100 shown in FIG. 1 will be described. The brine outlet temperature is Tb (° C), the hot water outlet temperature is Tw (° C), the outside air temperature is Ta (° C), the cascade heating power consumption is P1 (kW), and the outside air heat source heating power consumption is P2 (kW). Then,
[0067]

From the above formula, the operation efficiency (η1) of the cascade heating and the operation efficiency (η2) of the outside air heat source heating can be calculated. However, A31, B31, C31, A32, B32, C32, A33, B33, C33, A41, B41, C41, A42, B42, C42, A43, B43, and C43 are predetermined coefficients.
[0068]
Next, heating operation control of the heating control apparatus 100 according to the second embodiment will be described. FIG. 7 is a flowchart showing the heating operation control procedure in the air conditioning time zone of the heating control apparatus 100 according to the second embodiment. In this air conditioning time zone, it is assumed that the heat storage tank hot water heating operation is performed. As shown in the figure, when the temperature of the warm water in the heat storage tank 2 (temperature in the tank) is lower than the supply water temperature (No in step S701), the CPU 101 calculates the operation efficiency of cascade heating based on the current temperature in the tank. Then, the operating efficiency of the outside air heat source heating based on the current outside air temperature is calculated (step S703).
[0069]
As a result, when the operation efficiency of the cascade heating is smaller than the operation efficiency of the outside air source heating (No at Step S704), the outside air source heating operation is performed (Step S705), and the cascade heating ability is larger than the outside air source heating ability. In step S704, a cascade heating operation is performed (step S706). If the temperature of the hot water in the heat storage tank 2 (temperature in the tank) is higher than the supply water temperature (Yes at step S701), the heat storage tank hot water heating operation is performed (step S707). In addition, the process sequence of a thermal storage tank warm water heating operation, cascade heating, and an external air heat source heating operation is the same as that of what is shown in FIGS.
[0070]
As described above, in the second embodiment, since the optimum control is performed by the operation efficiency according to the surrounding environment / load condition, and the switching between the outdoor air heat source heating operation and the cascade heating operation is performed, the heat storage tank As a result, the operating temperature range can be expanded and the operating efficiency can be improved as compared with the conventional operating method.
[0071]
Embodiment 3 FIG.
By the way, in Embodiment 1 described above, switching between the outside air heat source heating operation and the cascade heating operation is performed based on the heating capacity, and in Embodiment 2, switching between the outside air heat source heating operation and the cascade heating operation is performed based on the operation efficiency. However, it is also possible to switch between the outside air heat source heating operation and the cascade heating operation by combining these heating capacities and operation efficiency.
[0072]
Therefore, in the third embodiment, a case will be described in which switching between the outdoor air heat source heating operation and the cascade heating operation is performed by combining the heating capacity and the operation efficiency. The system system of the heat storage system and the hardware of the heating control device 100 are the same as those shown in FIG. 1 and FIG.
[0073]
FIG. 8 is a flowchart showing the heating operation control procedure in the air conditioning time zone of the heating control apparatus 100 according to the third embodiment. In this air conditioning time zone, it is assumed that the heat storage tank hot water heating operation is performed. As shown in the figure, when the temperature of the hot water in the heat storage tank 2 (the temperature in the tank) is lower than the supply water temperature (No in step S801), the CPU 101 determines whether the heating capacity is prioritized or the operation efficiency is prioritized. In the case of priority (step S802, capacity priority), the cascade heating capacity based on the current tank temperature is calculated (step S803), and then the outside heat source heating capacity based on the current outside temperature is calculated (step S804).
[0074]
When the cascade heating capacity is smaller than the outside air source heating capacity (No at Step S805), the outside air source heating operation is performed (Step S808), and when the cascade heating capacity is larger than the outside air source heating capacity (Step S805). (Yes), cascade heating operation is performed (step S809). In addition, when it is determined whether the heating capacity is prioritized or the operation efficiency is prioritized and the operation efficiency is prioritized (step S802, operation efficiency is prioritized), the cascade heating operation efficiency according to the current temperature in the tank is calculated (step S806). The outside air heat source heating operation efficiency according to the current outside air temperature is calculated (step S807).
[0075]
When the cascade heating operation efficiency is smaller than the outside air source heating operation efficiency (No at Step S807), the outside air source heating operation is performed (Step S808), and when the cascade heating operation efficiency is larger than the outside air source heating operation efficiency. (Yes in step S807), cascade heating operation is performed (step S809). In addition, when the temperature (temperature in a tank) of the hot water of the thermal storage tank 2 is higher than supply water temperature (step S801 affirmation), a thermal storage tank warm water heating operation is performed (step S810).
[0076]
As described above, according to the third embodiment, the optimum control is performed by the heating capacity or the operation efficiency according to the surrounding environment / load condition, and the switching between the outdoor air heat source heating operation and the cascade heating operation is performed. By doing so, since the temperature range which can use a thermal storage tank spreads, it becomes possible to aim at the improvement of operation efficiency compared with the conventional operation method.
[0077]
In the first to third embodiments, the heating operation or the operation efficiency of the cascade heating and the outside heat source heating is compared, and then one of the heating operations is performed. However, the present invention is not limited to this. Alternatively, the heating operation can be started immediately when it is determined that the tank temperature is lower than the supply water temperature.
[0078]
For example, when switching between the outdoor heat source heating operation and the cascade heating operation depending on the heating capacity, as shown in FIG. 9, when the temperature of the hot water in the heat storage tank 2 (temperature in the tank) is lower than the supply water temperature, (No in step S901), the cascade heating operation is started (step S902), the cascade heating capacity based on the current temperature inside the tank is calculated (step S903), and then the outside heat source heating capacity based on the current outside temperature is calculated (step S903). S904).
[0079]
When the cascade heating capability is smaller than the outside air source heating capability (No at Step S905), the cascade heating operation is stopped and the outside air source heating operation is performed (Step S906), and the cascade heating capability is greater than the outside air source heating capability. If larger (No at Step S905), the cascade heating operation is continued (Step S907). In addition, when the temperature of the hot water in the heat storage tank 2 (temperature in the tank) is higher than the supply water temperature (Yes in step S901), the heat storage tank hot water heating operation is performed (step S908).
[0080]
【The invention's effect】
As described above, according to the present invention, based on the temperature of the first heat transfer medium in the heat storage tank and the characteristics of the outside air heat source heating operation means and the cascade heating operation means, the control means is the outside air source heating operation means or Since the cascade heating operation means is switched and controlled, heating that can efficiently switch between the outside air source heating operation means or the cascade heating operation means and flexibly respond to the outside air temperature, the water temperature in the heat storage tank, or the local load situation. There is an effect that a control device can be obtained.
[0081]
According to the next invention, when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than the predetermined temperature, the control is directly switched to the heating operation means, so the temperature in the heat storage tank is effective. There exists an effect that the heating control device which can be used is obtained.
[0082]
According to the next invention, the heating capacity of the outside air source heating operation means and the heating capacity of the cascade heating operation means are compared, and the switching control is performed to the outside air source heating operation means or the cascade heating operation means having a higher heating capacity. Therefore, there is an effect that a heating control device capable of performing heating using a heating operation means with higher heating capacity can be obtained.
[0083]
According to the next invention, the operation efficiency of the outside air heat source heating operation means and the operation efficiency of the cascade heating operation means are compared, and the switching efficiency is controlled to the outside air heat source heating operation means or the cascade heating operation means with higher operation efficiency. Therefore, there is an effect that a heating control device capable of heating using a heating operation means with higher operation efficiency can be obtained.
[0084]
According to the next invention, since either the first switching means for switching based on the heating capacity or the second switching means for switching based on the operating efficiency is selected, the heating capacity or the driving capacity is selected. There exists an effect that the heating control apparatus which can perform the heating operation based on efficiency is obtained.
[0085]
According to the next invention, the heating capacity of the outside heat source heating operation means is calculated based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, the temperature of the first heat transfer medium in the heat storage tank, and Since the heating capacity of the cascade heating operation means is calculated based on the temperature of the second heat transfer medium output from the heat exchanger, the heating control capable of efficiently calculating the heating capacity of each operation means There exists an effect that an apparatus is obtained.
[0086]
According to the next invention, the operating efficiency of the outside air heat source heating operation means is calculated based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, the temperature of the first heat transfer medium in the heat storage tank, and Since the operation efficiency of the cascade heating operation means is calculated based on the temperature of the second heat transfer medium output from the heat exchanger, the heating control capable of efficiently calculating the operation efficiency of each operation means There exists an effect that an apparatus is obtained.
[0087]
According to the next invention, it is configured to switch and control the outside air heat source heating operation means or the cascade heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the characteristics of the outside air heat source heating operation and the cascade heating operation. Therefore, there is an effect that it is possible to obtain a heating control method that can efficiently switch between the outside air heat source heating operation or the cascade heating operation and flexibly cope with the outside air temperature, the water temperature in the heat storage tank, or the local load situation.
[0088]
According to the next invention, when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than the predetermined temperature, it is configured to control the switching directly to the heating operation, so the temperature in the heat storage tank is effectively used. The effect that the heating control method which can do is obtained is produced.
[0089]
According to the next invention, the heating capacity of the outdoor air source heating operation and the heating capacity of the cascade heating operation are compared, and the switching control is performed to the outdoor air source heating operation or the cascade heating operation having a higher heating capacity. There exists an effect that the heating control method which can be heated using heating operation with high capability is obtained.
[0090]
According to the next invention, the operation efficiency of the outside air heat source heating operation and the operation efficiency of the cascade heating operation are compared, and the switching efficiency is controlled to the outside air heat source heating operation or the cascade heating operation with higher operation efficiency. There exists an effect that the heating control method which can be heated using heating operation with high efficiency is obtained.
[0091]
According to the next invention, on the basis of either the heating capacity or the operating efficiency of the outdoor air heat source heating operation and the cascade heating operation, it is configured to switch to the outdoor air heat source heating operation or the cascade heating operation having a higher heating capacity or operating efficiency. Therefore, there is an effect that a heating control method capable of performing the heating operation based on the heating capacity or the operation efficiency is obtained.
[0092]
According to the next invention, the heating capacity of the outside heat source heating operation is calculated based on the temperature of the first transfer medium in the heat storage tank and the outside air temperature, and the temperature and heat exchange of the first heat transfer medium in the heat storage tank. Since the heating capacity of the cascade heating operation is calculated based on the temperature of the second heat transfer medium output from the heater, a heating control method capable of efficiently calculating the heating capacity of each operating means is obtained. There is an effect that is.
[0093]
According to the next invention, the operating efficiency of the outside heat source heating operation is calculated based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature, and the temperature and heat of the first heat transfer medium in the heat storage tank are calculated. Since the operation efficiency of the cascade heating operation is calculated based on the temperature of the second heat transfer medium output from the exchanger, a heating control method capable of efficiently calculating the operation efficiency of each operation is obtained. There is an effect that is.
[0094]
According to the next invention, by recording a program for causing a computer to execute the method described in any one of the above methods, the program can be read by a machine, and thereby, the operation of any one of the above methods It is possible to obtain a recording medium that can be realized by a computer.
[0095]
According to the next invention, since it was set as the structure provided with said heating control apparatus, there exists an effect that the thermal storage system which can perform optimal automatic heating operation is obtained.
[0096]
According to the next invention, since the recording medium is provided, the heat storage system capable of realizing any one of the above-described methods by a computer is obtained.
[Brief description of the drawings]
FIG. 1 is a system diagram showing the configuration of a heat storage system used in Embodiment 1. FIG.
FIG. 2 is a block diagram showing a hardware configuration of the heating control apparatus shown in FIG.
FIG. 3 is a flowchart showing a heating operation control procedure according to the first embodiment;
FIG. 4 is a flowchart showing a processing procedure of a heat storage tank hot water heating operation.
FIG. 5 is a flowchart showing a processing procedure of cascade heating operation.
FIG. 6 is a flowchart showing a processing procedure of an outside air heat source heating operation.
FIG. 7 is a flowchart showing a heating operation control procedure according to the second embodiment.
FIG. 8 is a flowchart illustrating a heating operation control procedure according to the third embodiment.
FIG. 9 is a flowchart showing a modification of the heating operation control procedure.
FIG. 10 is a diagram for explaining the heating capacity of the cascade heating operation and the outside air source heating operation.
[Explanation of symbols]
1 heat source machine, 2 heat storage tank, 3 cold / hot water pump, 4 brine pump, 5 water side three-way valve, 6 brine side three way valve, 7 heat source machine cold / hot water outlet, 8 cold / hot water pipe, 9 cold / hot water pipe, 10 cold / hot water pipe , 11 Cold / hot water pipe, 12 Cold / hot water pipe, 13 Heat source machine cold / hot water inlet, 14 Heat source machine brine outlet, 15 Brine pipe, 16 Brine pipe, 17 Brine pipe, 18 Heat source machine brine inlet, 19 Heat storage tank temperature sensor, 20 supply Water temperature sensor, 21 heat source machine brine inlet temperature sensor, 22 heat source machine brine outlet temperature sensor, 23 heat source machine cold / hot water outlet temperature sensor.

Claims (15)

In a heating control apparatus that performs heating control of the heat load by supplying the heat amount of the first heat transfer medium stored in the heat storage tank to the heat load,
Outside air heat source heating operation means for supplying the heat load to the heat load while storing the first heat transfer medium heated by the outside air heat source in the heat storage tank,
Cascade heating operation means for exchanging heat of the first heat transfer medium with the heat exchanger to the second heat transfer medium and supplying the heat quantity of the second heat transfer medium to the heat load;
Control means for switching and controlling the outside air heat source heating operation means or the cascade heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the characteristics of the outside air heat source heating operation means and the cascade heating operation means;
With
Direct heating operation means for directly supplying the amount of heat of the first heat transfer medium in the heat storage tank to the heat load;
When the temperature of the 1st heat transfer medium in the said thermal storage tank is more than predetermined temperature, the said control means controls switching to the said direct heating operation means, The heating control apparatus characterized by the above-mentioned . The control means compares the heating capacity of the outside air heat source heating operation means and the heating capacity of the cascade heating operation means, and performs switching control to an outside air heat source heating operation means or a cascade heating operation means having a higher heating capacity. The heating control device according to claim 1 . The control means compares the operation efficiency of the outside air heat source heating operation means and the operation efficiency of the cascade heating operation means, and performs switching control to the outside air heat source heating operation means or the cascade heating operation means having a higher operation efficiency. The heating control device according to claim 1 . The control means includes
A first switching means for comparing the heating capacity of the outside air heat source heating operation means and the heating capacity of the cascade heating operation means to switch to the outside air heat source heating operation means or the cascade heating operation means having a higher heating capacity;
A second switching means for comparing the operating efficiency of the outside air heat source heating operation means and the operation efficiency of the cascade heating operation means and switching to the outside air heat source heating operation means or the cascade heating operation means having a higher operation efficiency;
Switching selection means for selecting either the first switching means or the second switching means;
The heating control device according to claim 1 , comprising: The first switching means includes
First calculating means for calculating the heating capacity of the outside heat source heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature;
Second calculating means for calculating the heating capacity of the cascade heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger; ,
The heating control apparatus according to claim 4 , comprising: The second switching means includes
Third calculation means for calculating the operating efficiency of the outside air heat source heating operation means based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature;
Fourth calculating means for calculating the operating efficiency of the cascade heating operating means based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger; ,
The heating control apparatus according to claim 4 , comprising: In the heating control method of performing heating control of the heat load by supplying the heat amount of the first heat transfer medium stored in the heat storage tank to the heat load,
The first heat transfer medium heated by the outside heat source or the heat exchanger that supplies the heat load to the heat load while storing the first heat transfer medium heated by the outside air heat source in the heat storage tank. The first heat transfer medium in the heat storage tank is replaced with any one of the cascade heating operations in which the heat amount of the second heat transfer medium is exchanged with the second heat transfer medium and the heat amount of the second heat transfer medium is supplied to the heat load. Switching control based on the temperature of the heat source and the characteristics of the outside air heat source heating operation and the cascade heating operation, and when the temperature of the first heat transfer medium in the heat storage tank is equal to or higher than a predetermined temperature, A heating control method characterized by switching to direct heating operation for directly supplying the heat amount of one heat transfer medium to the heat load . 8. The heating control according to claim 7 , wherein the heating capacity of the outdoor air heat source heating operation and the heating capacity of the cascade heating operation are compared, and switching control is performed to an outdoor air heat source heating operation or a cascade heating operation having a higher heating capacity. Method. 8. The heating control according to claim 7 , wherein the operation efficiency of the outside air heat source heating operation and the operation efficiency of the cascade heating operation are compared, and switching control is performed to an outside air heat source heating operation or a cascade heating operation with higher operation efficiency. Method. Based on said one outside air heat source or heating capacity or operation efficiency of the heating operation and cascading heating operation, in claim 7, characterized in that switching to higher external air heat source heating operation or cascade heating operation of heating capacity or operation efficiency The heating control method described. A first calculation step of calculating the heating capacity of the outside air heat source heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature;
A second calculation step of calculating the heating capacity of the cascade heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger;
The heating control method according to claim 10 , further comprising: A third calculation step of calculating the operating efficiency of the outside air heat source heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the outside air temperature;
A fourth calculation step of calculating the operation efficiency of the cascade heating operation based on the temperature of the first heat transfer medium in the heat storage tank and the temperature of the second heat transfer medium output from the heat exchanger;
The heating control method according to claim 10 , further comprising: A computer-readable recording medium having recorded thereon a program for causing a computer to execute the method according to any one of claims 7 to 12 . A heat storage system comprising the heating control device according to any one of claims 1 to 6 . A heat storage system comprising the recording medium according to claim 13 .

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