JPH0739875B2 - Method of grasping the remaining amount of heat storage in the heat storage tank - Google Patents
Method of grasping the remaining amount of heat storage in the heat storage tankInfo
- Publication number
- JPH0739875B2 JPH0739875B2 JP62108249A JP10824987A JPH0739875B2 JP H0739875 B2 JPH0739875 B2 JP H0739875B2 JP 62108249 A JP62108249 A JP 62108249A JP 10824987 A JP10824987 A JP 10824987A JP H0739875 B2 JPH0739875 B2 JP H0739875B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- storage tank
- amount
- heat
- remaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は蓄熱槽における蓄熱残量把握方法に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a method for ascertaining the remaining heat storage amount in a heat storage tank.
従来ビル用空調システム、産業用冷温熱利用システム
で、ランニングコストの低減を目的として夜間の余剰電
力を利用し、これを蓄熱しておき、昼間これらの熱媒を
利用して冷暖房空調を行うことが行なわれている。Conventional building air-conditioning systems and industrial cold / heat utilization systems use surplus power at night for the purpose of reducing running costs, store it, and use these heat media during the day to perform heating / cooling air conditioning. Is being carried out.
上記の蓄熱のための蓄熱槽としては、潜熱蓄熱剤を封入
したカプセルを水密槽内に充填し、この槽内に熱媒を流
通させることによって相互の熱媒交換を図り蓄熱放熱を
行うものが多く採用されている。As the heat storage tank for the above heat storage, there is one in which a capsule enclosing a latent heat storage agent is filled in a watertight tank, and a heat medium is circulated in the tank to exchange heat medium with each other to radiate heat. It is widely adopted.
ところで、蓄熱槽より放熱を行う場合、蓄熱槽の蓄熱容
量は有限であるから、その蓄熱残量を把握しておくこと
は非常に重要であり、空調装置等の稼動中に蓄熱量が尽
きてしまう場合などはこれを予知して前もって予備の暖
房、又は冷房システムの稼動準備をしておかなくてはな
らない。By the way, when radiating heat from the heat storage tank, the heat storage capacity of the heat storage tank is finite, so it is very important to know the remaining amount of heat storage, and the heat storage amount will be exhausted during operation of the air conditioner etc. If this happens, it is necessary to anticipate this and prepare for the preliminary heating or cooling system in advance.
しかるに従来、潜熱蓄熱カプセルを用いた蓄熱槽にあっ
ては、蓄熱残量を常時把握する適当な手段が無かった。
例えば蓄熱槽の熱媒出口温度の推移により蓄熱残量を推
計することが行なわれることも有るが、潜熱による温度
変化は直線的でなく、従って温度変化を把握しても蓄熱
残量は必ずしも正確に推定することは出来ない問題が有
った。However, conventionally, in the heat storage tank using the latent heat storage capsule, there was no suitable means for constantly grasping the remaining heat storage amount.
For example, the remaining heat storage amount may be estimated by the transition of the heat medium outlet temperature of the heat storage tank, but the temperature change due to latent heat is not linear, and therefore the remaining heat storage amount is not always accurate even if the temperature change is grasped. There was a problem that could not be estimated.
また、蓄熱材料として氷を用いたものにあっては、氷の
融解時の水位変化、あるいは製氷熱交換器の浮力等を基
に蓄熱残量を推計することも試みられているが、蓄熱残
量を知るためのパラメータが二次的であり、間接的測定
となって誤差の介入が無視出来ず、修正もかなりやっか
いとなるなどの問題が有った。In the case of using ice as the heat storage material, it has been attempted to estimate the remaining heat storage amount based on the water level change when the ice melts or the buoyancy of the ice making heat exchanger. Since the parameter for knowing the quantity is secondary, it is an indirect measurement and the intervention of error cannot be ignored, and there is a problem that the correction is considerably troublesome.
この発明は上記問題点に鑑み、蓄熱槽内の蓄熱残量をそ
の時の蓄熱槽内の温度をパラメータとして直接的に測定
し、もって正確な蓄熱残量を知ることの出来る方法を得
ることを目的としてなされたものである。In view of the above problems, the present invention aims to obtain a method capable of directly measuring the remaining heat storage amount in the heat storage tank using the temperature in the heat storage tank at that time as a parameter, and thus knowing the accurate remaining heat storage amount. It was made as.
即ち、この発明の蓄熱槽における蓄熱残量把握方法は潜
熱蓄熱カプセルを充填した蓄熱槽において、熱媒入口及
び出口付近の潜熱蓄熱カプセル温度をサンプリングし、
これらの平均温度を得、該平均温度を三次関数の変数と
して、蓄熱槽から出た熱量を演算し、該演算結果を蓄熱
槽の持つ全蓄熱量より減じて蓄熱残量を演算することを
特徴とするものである。That is, the remaining amount of heat storage grasping method in the heat storage tank of the present invention, in the heat storage tank filled with latent heat storage capsules, sampling the latent heat storage capsule temperature near the heat medium inlet and outlet,
A characteristic is that these average temperatures are obtained, the amount of heat emitted from the heat storage tank is calculated using the average temperature as a variable of a cubic function, and the calculation result is subtracted from the total heat storage amount of the heat storage tank to calculate the remaining heat storage amount. It is what
潜熱蓄熱カプセルの持つ、蓄熱残量は周知のように潜熱
蓄熱剤の溶解、または凍結時は温度エネルギが相変化に
費やされ、その間の表面温度は変化せず一定値を保つ。As is well known, the residual heat storage capacity of the latent heat storage capsules is such that when the latent heat storage agent is melted or frozen, temperature energy is consumed for phase change, and the surface temperature during that time does not change and maintains a constant value.
多数の潜熱蓄熱カプセルを充填した蓄熱槽においては、
これら各潜熱蓄熱カプセルの熱容量の相和がその槽の蓄
熱残量となる。In a heat storage tank filled with many latent heat storage capsules,
The sum of the heat capacities of these latent heat storage capsules is the residual heat storage capacity of the tank.
従って、一般的に潜熱蓄熱槽の持つ熱容量の経時的変化
は第２図に示すように縦軸を熱容量（Ｑ）横軸を温度
（ｔ）とした場合潜熱蓄熱カプセルの温度ｔにつき、 Ｑ＝ｆ（ｔ）＝At3＋Bt2＋Ct＋Ｄ （A,B,C,Dは定数） の三次関数で表すことが出来る。Therefore, in general, the temporal change of the heat capacity of the latent heat storage tank is as shown in FIG. 2, where Q = is the heat capacity (Q) on the vertical axis and temperature (t) is the horizontal axis, and Q = f (t) = at 3 + Bt 2 + Ct + D (a, B, C, D are constants) can be expressed by a cubic function of.
そして、上記潜熱蓄熱カプセルの温度は、本来はすべて
のものの温度を測定することが望ましいが、潜熱蓄熱カ
プセルの温度の授受を考えた場合、熱媒入口と出口付近
のものが、最も大きな変化を行ない、他はこれらの中間
的なものと考えられる。And, the temperature of the latent heat storage capsule, originally it is desirable to measure the temperature of all things, when considering the transfer of the temperature of the latent heat storage capsule, those near the heat medium inlet and outlet, the largest change Others are considered to be in between.
従って、蓄熱槽全体の蓄熱残量を知るための温度パラメ
ータは、上記二箇所のカプセル温度の相和平均を知れば
相似的に知ることが可能となる。Therefore, the temperature parameter for knowing the remaining heat storage amount of the entire heat storage tank can be known analogously by knowing the sum average of the capsule temperatures at the two locations.
従って、上記相和平均温度を前述の三次関数の変数とし
て代入すれば、第２図に示すようにその時の放熱容量が
知ることが可能となり、この値を蓄熱槽の持つ総蓄熱量
から減ずれば蓄熱残量を測定可能となるのである。Therefore, by substituting the above-mentioned sum average temperature as a variable of the above-mentioned cubic function, it becomes possible to know the heat radiation capacity at that time as shown in FIG. 2, and this value is deviated from the total heat storage amount of the heat storage tank. For example, it is possible to measure the remaining amount of heat storage.
なお、潜熱蓄熱カプセルの温度変化は時間によって変化
するから、一定時間毎にこれを測定し、その変化率を観
察することによって蓄熱残量の０となる時刻を予想する
ことも可能となる。Since the temperature change of the latent heat storage capsule changes with time, it is also possible to predict the time when the remaining heat storage amount becomes 0 by measuring this at regular intervals and observing the change rate.
次に、この発明の実施例を説明する。 Next, an embodiment of the present invention will be described.
第１図に示すように４つの蓄熱槽1,1,1,1を組合わせ、
熱媒流通経路を矢印Ｘで示すように構成した潜熱蓄熱槽
において熱媒入口２及び出口３付近の潜熱蓄熱カプセル
Ap及びDpをサンプルとし、これに温度センサを取り付
け、これらからの温度情報を相和平均演算回路４に入力
し、この出力を熱量演算回路５に入力し、得た結果を予
め設定した第２図に示すような放冷量近似曲線と比較回
路６により比較させ、蓄熱残量をデジタル表示７させ
た。As shown in Fig. 1, combine four heat storage tanks 1,1,1,1
A latent heat storage capsule near the heat medium inlet 2 and the outlet 3 in the latent heat storage tank whose heat medium flow path is configured as shown by the arrow X.
Ap and Dp are taken as samples, temperature sensors are attached to these samples, temperature information from these is input to the sum average calculation circuit 4, this output is input to the calorific value calculation circuit 5, and the obtained results are set in advance. A comparison circuit 6 is used to compare the approximate amount of heat release as shown in the figure, and the remaining heat storage amount is displayed digitally 7.
上記デジタル表示された蓄熱残量及び変化率より得られ
る以後の所定放熱継続時間とを実際の運転状況と対比し
たところ、予想放熱終了時刻と実際の放熱終了時刻との
差は５分以内に止まった。When the predetermined heat radiation continuation time obtained from the digitally displayed heat storage remaining amount and the rate of change is compared with the actual operating condition, the difference between the predicted heat radiation end time and the actual heat radiation end time stops within 5 minutes. It was
この発明は以上説明したように潜熱蓄熱槽の蓄熱残量を
直接潜熱蓄熱カプセルの温度をサンプリングして測定す
るため、その検知が迅速かつ正確に行なわれ、またその
推移の予想も容易にできることから補助加熱又は冷却装
置の稼動見込みも容易に推定でき、運転管理が非常に容
易となるのである。As described above, since the present invention directly measures the residual heat storage capacity of the latent heat storage tank by sampling the temperature of the latent heat storage capsule, its detection can be performed quickly and accurately, and its transition can be predicted easily. The operation prospect of the auxiliary heating or cooling device can be easily estimated, and operation management becomes very easy.
第１図はこの発明の実施例の平面図、第２図は放冷量近
似曲線の一例を示すグラフである。FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a graph showing an example of a cooling amount approximation curve.
Claims (1)
て、熱媒入口及び出口付近の潜熱蓄熱カプセル温度をサ
ンプリングし、これらの平均温度を得、該平均温度を三
次関数の変数として、蓄熱槽から出た熱量を演算し、該
演算結果を蓄熱槽の持つ全蓄熱量より減じて蓄熱残量を
演算することを特徴とする蓄熱槽における蓄熱残量把握
方法。1. In a heat storage tank filled with latent heat storage capsules, the latent heat storage capsule temperatures near the inlet and outlet of a heat medium are sampled to obtain their average temperatures, and the average temperature is used as a variable of a cubic function from the heat storage tank. A method for ascertaining the remaining heat storage amount in a heat storage tank, wherein the amount of heat output is calculated, and the calculation result is subtracted from the total heat storage amount of the heat storage tank to calculate the remaining heat storage amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62108249A JPH0739875B2 (en) | 1987-04-30 | 1987-04-30 | Method of grasping the remaining amount of heat storage in the heat storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62108249A JPH0739875B2 (en) | 1987-04-30 | 1987-04-30 | Method of grasping the remaining amount of heat storage in the heat storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63273753A JPS63273753A (en) | 1988-11-10 |
| JPH0739875B2 true JPH0739875B2 (en) | 1995-05-01 |
Family
ID=14479867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62108249A Expired - Lifetime JPH0739875B2 (en) | 1987-04-30 | 1987-04-30 | Method of grasping the remaining amount of heat storage in the heat storage tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0739875B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004101031A (en) * | 2002-09-06 | 2004-04-02 | Daikin Ind Ltd | Hot water supply system |
| CN114370896B (en) * | 2021-12-29 | 2024-03-19 | 贵州电网有限责任公司 | Method for monitoring heating power generation capacity of heat storage tank of expansion power generation system |
-
1987
- 1987-04-30 JP JP62108249A patent/JPH0739875B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63273753A (en) | 1988-11-10 |
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