JP3263144B2 - Ice amount measurement device in ice thermal storage tank - Google Patents
Ice amount measurement device in ice thermal storage tankInfo
- Publication number
- JP3263144B2 JP3263144B2 JP25322792A JP25322792A JP3263144B2 JP 3263144 B2 JP3263144 B2 JP 3263144B2 JP 25322792 A JP25322792 A JP 25322792A JP 25322792 A JP25322792 A JP 25322792A JP 3263144 B2 JP3263144 B2 JP 3263144B2
- Authority
- JP
- Japan
- Prior art keywords
- ice
- storage tank
- heat medium
- amount
- heat
- 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 - Fee Related
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、氷蓄熱槽内の氷量測定
装置、特に、熱媒体総量が変動する氷蓄熱槽内の氷量測
定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the amount of ice in an ice heat storage tank, and more particularly to an apparatus for measuring the amount of ice in an ice heat storage tank in which the total amount of heat medium fluctuates.
【０００２】[0002]
【従来の技術】氷蓄熱槽内の氷の量を測定する場合、氷
が生成することによる槽内の液面の変化から氷の量を測
定する方式が、一般的である。2. Description of the Related Art When measuring the amount of ice in an ice storage tank, a method of measuring the amount of ice based on a change in the liquid level in the tank due to formation of ice is generally used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、氷蓄熱槽内の
熱媒体総量が変化する場合、熱媒体総量の変化によって
氷の量が誤って計算されてしまう。例えば、熱媒体総量
が増えた場合、氷の量に関係なく槽内の液面は上昇し、
氷の量を高く計算する。一方、熱媒体総量が減った場
合、氷の量に関係なく、槽内の液面は下降し、氷の量を
低く計算する。However, when the total amount of the heat medium in the ice heat storage tank changes, the amount of ice is erroneously calculated due to the change in the total amount of the heat medium. For example, when the total amount of heat medium increases, the liquid level in the tank rises regardless of the amount of ice,
Calculate the amount of ice higher. On the other hand, when the total amount of the heat medium is reduced, the liquid level in the tank falls, regardless of the amount of ice, and the amount of ice is calculated to be low.
【０００４】本発明は、かかる問題を克服するためにな
されたものであり、その目的は、熱媒体総量が変動して
も、氷蓄熱槽内の氷量を正確に測定する氷量測定装置を
提供することにある。[0004] The present invention has been made to overcome such a problem, and an object of the present invention is to provide an ice amount measuring device for accurately measuring the amount of ice in an ice storage tank even when the total amount of a heat medium fluctuates. To provide.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成し得る本
発明の氷量測定装置は、熱媒体総量が変動する断面積Ａ
(cm2 ) の氷蓄熱槽と、氷蓄熱槽の頂部に設けた超音波
レベル計と、氷蓄熱槽の底部に設けた圧力計と、氷蓄熱
槽内の熱媒体温度を測定する温度計と前記熱媒体の濃度
を測定する屈折率計と、前記超音波レベル計、圧力計、
温度計及び屈折率計と電気的に接続された演算機とから
成り、演算機が氷蓄熱槽の断面積Ａ (cm 2 ) と圧力計か
ら入力した槽底部の圧力Ｐ (kg／cm2 ) から求めた熱媒
体総量Ｇ(kg) と、熱媒体の濃度Ｃ (wt％) と温度Ｔ
(℃) から求めた熱媒体の密度ρbと、超音波レベル計か
ら入力した熱媒体の深さ (cm) と、から槽内の氷の重量
ＧＩ (kg) を演算する機能を備えていることを特徴とす
るものである。A book which can achieve the above object.
The ice amount measuring device of the invention has a cross-sectional area A where the total amount of the heat medium fluctuates.
(cmTwo) Ice heat storage tank and ultrasonic waves installed on the top of the ice heat storage tank
Level gauge, pressure gauge at the bottom of the ice storage tank, and ice heat storage
Thermometer for measuring the temperature of the heat medium in the tank and the concentration of the heat medium
And an ultrasonic level meter, a pressure gauge,
From a thermometer and a computer electrically connected to the refractometer
And the computer calculates the cross-sectional area A (cm Two) And pressure gauge
Pressure (P / kg / cm)Two)
Total body weight G (kg), heat medium concentration C (wt%) and temperature T
Density of heat medium ρ calculated from (℃)bAnd an ultrasonic level meter
And the weight of the ice in the tank
It has a function of calculating GI (kg).
Things.
【０００６】このように熱媒体総量が変動する断面積Ａ
(cm2 ) の氷蓄熱槽と、氷蓄熱槽の頂部に設けた超音波
レベル計と、氷蓄熱槽の底部に設けた圧力計と、氷蓄熱
槽内の熱媒体温度を測定する温度計と前記熱媒体の濃度
を測定する屈折率計と、前記超音波レベル計、圧力計、
温度計及び屈折率計と電気的に接続された演算機とから
成り、演算機が氷蓄熱槽の断面積Ａ (cm2 ) と圧力計か
ら入力した槽底部の圧力Ｐ (kg／cm2 ) から求めた熱媒
体総量Ｇ (kg) と、熱媒体の濃度Ｃ (wt％) と温度Ｔ
(℃) から求めた熱媒体の密度ρb と、超音波レベル計
から入力した熱媒体の深さ (cm) と、から槽内の氷の重
量ＧＩ (kg) を演算する機能を備えていることを特徴と
することより、熱媒体総量が変動しても、氷蓄熱槽内の
氷量を正確に測定することができる。The cross-sectional area A in which the total amount of the heat medium fluctuates is
(cm 2 ) ice thermal storage tank, an ultrasonic level gauge provided at the top of the ice thermal storage tank, a pressure gauge provided at the bottom of the ice thermal storage tank, and a thermometer for measuring the temperature of the heat medium in the ice thermal storage tank. Refractometer for measuring the concentration of the heat medium, the ultrasonic level meter, pressure gauge,
It consists of a thermometer and a calculator electrically connected to the refractometer, and the calculator has a sectional area A (cm 2 ) of the ice heat storage tank and a pressure P (kg / cm 2 ) at the bottom of the tank input from the pressure gauge. Of heating medium G (kg), concentration C (wt%) of heating medium and temperature T
It has a function to calculate the weight GI (kg) of ice in the tank from the density ρ b of the heat medium obtained from (° C) and the depth (cm) of the heat medium input from the ultrasonic level meter. With this feature, even if the total amount of the heat medium changes, the amount of ice in the ice heat storage tank can be accurately measured.
【０００７】[0007]
【実施例】以下、図面により本発明の実施例を説明す
る。図１において、１は氷蓄熱槽であり、氷蓄熱槽１内
には、配管８を通って氷スラリーが供給される一方、氷
蓄熱槽１内の熱媒体ｂが配管９を通って熱交換器 (図示
せず) に供給されるようになっている。符号ｉは、細粗
粒氷を示している。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an ice heat storage tank, and ice slurry is supplied into the ice heat storage tank 1 through a pipe 8, while a heat medium b in the ice heat storage tank 1 passes through a pipe 9 to exchange heat. (Not shown). The symbol i indicates fine and coarse-grained ice.
【０００８】一方、氷蓄熱槽１の天井部には、超音波レ
ベル計２が設けられ、氷蓄熱槽１の底部には、圧力計
(差圧発信器) ３が設けられている。さらに、氷蓄熱槽
１の側壁には、温度計５及び屈折率計６が配設されてい
る。温度計５と屈折率計６とは、熱媒体がエチレングリ
コール水溶液等、凝固点降下を起こす熱媒体の時のみ使
用するようになっている。On the other hand, an ultrasonic level gauge 2 is provided on the ceiling of the ice heat storage tank 1, and a pressure gauge is provided on the bottom of the ice heat storage tank 1.
(Differential pressure transmitter) 3 is provided. Further, a thermometer 5 and a refractometer 6 are provided on a side wall of the ice heat storage tank 1. The thermometer 5 and the refractometer 6 are used only when the heat medium is a heat medium that causes a freezing point drop, such as an ethylene glycol aqueous solution.
【０００９】上記超音波レベル計２、圧力計３、温度計
５及び屈折率計６と電気的に接続している演算機４は、
次の機能を有している。すなわち、圧力計３から入力し
た氷蓄熱槽１の底部の圧力Ｐ (kg／cm2 ) から熱媒体総
量Ｇ (kg) を求めるとともに、超音波レベル計２から液
面Ｗの変化を求める。さらに、温度計５と屈折率計６に
よって測定した熱媒体 (氷分を除く) の濃度Ｃ (wt％)
と温度Ｔ (℃) から熱媒体の密度ρb を求める。ここ
で、氷の密度をρI とすると、熱媒体の氷の密度ρb に
対し、氷の密度ρI の方が小さいため、一部分、氷が熱
媒体から浮上することになる。この場合、氷の排除容積
は、氷の重量と同等の熱媒体の容積となる。また、熱媒
体の容積と氷の容積との差が、熱媒体に浮く氷の量にな
る。また、氷はある一定量の空気を含んだ状態となって
おり (空隙率：ε) 、この量と毛細管現象の量を補正す
ることによって氷の量が求まるようになっている。A computer 4 electrically connected to the ultrasonic level gauge 2, pressure gauge 3, thermometer 5, and refractometer 6 comprises:
It has the following functions: That is, the total heat medium amount G (kg) is determined from the pressure P (kg / cm 2 ) at the bottom of the ice storage tank 1 input from the pressure gauge 3, and the change in the liquid level W is determined from the ultrasonic level meter 2. Furthermore, the concentration C (wt%) of the heat medium (excluding ice) measured by the thermometer 5 and the refractometer 6
And the temperature T (° C.) to determine the density ρ b of the heat medium. Here, assuming that the density of ice is ρ I , the ice density ρ I is smaller than the ice density ρ b of the heat medium, so that part of the ice floats from the heat medium. In this case, the excluded volume of ice is the volume of the heat medium equivalent to the weight of ice. Also, the difference between the volume of the heat medium and the volume of ice is the amount of ice floating on the heat medium. The ice contains a certain amount of air (porosity: ε), and the amount of ice can be obtained by correcting this amount and the amount of capillary action.
【００１０】以下、計算式を用いて具体的に説明する。
氷蓄熱槽１内の熱媒体総量Ｇ (kg) は、氷蓄熱槽１の底
部に設けた圧力計３の出力Ｐ (kg／cm2 ) と、氷蓄熱槽
１の断面積Ａ (cm2 ) から求める。 Ｇ＝Ｐ×Ａ ・・・・ (１) 熱媒体の密度ρb は、熱媒体の濃度Ｃ (wt％ )と温度Ｔ
(℃) の関数 ρb ＝Ｆ (Ｃ，Ｔ) ・・・・ (２) となる。Hereinafter, a specific description will be given using a calculation formula.
The total amount G (kg) of the heat medium in the ice heat storage tank 1 is calculated by calculating the output P (kg / cm 2 ) of the pressure gauge 3 provided at the bottom of the ice heat storage tank 1 and the cross-sectional area A (cm 2 ) of the ice heat storage tank 1. Ask from. G = P × A (1) The density ρ b of the heat medium is represented by the concentration C (wt%) of the heat medium and the temperature T.
(° C.) function ρ b = F (C, T) (2)
【００１１】また、この時の氷の充填率をＩＰＦ (％)
とすると、氷分を除く熱媒体の重量Ｇb (kg) は、 Ｇ＝Ｇ−（Ｇ／100 ）×ＩＰＦ ・・・・ (３) となる。また、氷分を除く熱媒体の容積Ｖb (cm3 )
は、 Ｖb ＝Ｇb ／ρb ・・・・ (４) となる。At this time, the filling rate of the ice was calculated as IPF (%).
Then, the weight G b (kg) of the heat medium excluding the ice is G = G− (G / 100) × IPF (3). In addition, the volume V b (cm 3 ) of the heat medium excluding ice components
Is as follows: V b = G b / ρ b (4)
【００１２】一方、氷分の重量ＧI (kg) は、 Ｇ＝（Ｇ／100 ）×ＩＰＦ ・・・・ (５) となる。氷分の容積ＶI (cm3 ) は、 ＶI ＝ＧI ／ρI ・・・・ (６) となる。On the other hand, the weight G I (kg) of the ice is G = (G / 100) × IPF (5). Ice content of the volume V I (cm 3) is a V I = G I / ρ I ···· (6).
【００１３】熱媒体の中に沈む氷の容積ＶI-1 (cm3 )
は、 ＶI-1 ＝ＧI ／ρb ・・・・ (７) となる。熱媒体に浮く氷の容積ＶI-2 (cm3 ) は、 ＶI-2 ＝ＶI ／ＶI-1 ・・・・ (８) となる。The volume of ice sinking in the heat medium V I-1 (cm 3 )
Becomes V I-1 = G I / ρ b ···· (7). Volume of ice floats on the heating medium V I-2 (cm 3) is a V I-2 = V I / V I-1 ···· (8).
【００１４】また、熱媒体に浮く氷において、空隙率を
εとすると、実際に熱媒体に浮く氷の容積ＶI-3 (cm3 )
は、 ＶI-3 ＝ＶI-2 ／ (１−ε) ・・・・ (９) となる。従って、熱媒体全体の容積Ｖは、 Ｖ＝ＶI-1 ＋ＶI-3 ＋Ｖb ・・・・ (10) となる。Further, assuming that the porosity of the ice floating on the heat medium is ε, the volume V I-3 (cm 3 ) of the ice actually floating on the heat medium
Is as follows: VI -3 = VI -2 / (1- [epsilon]) (9) Therefore, the volume V of the entire heat medium is as follows: V = VI -1 + VI -3 + Vb (10)
【００１５】一方、超音波レベル計２の出力Ｈ (cm)
は、 Ｈ＝Ｖ／Ａ ・・・・ (11) となる。ここで、上記 (10) 式に上記 (４), (７) 及び
(９) 式を代入すると、上記熱媒体全体の容積Ｖは、On the other hand, the output H (cm) of the ultrasonic level meter 2
Is as follows: H = V / A (11) Here, the above equations (4), (7) and
Substituting equation (9), the volume V of the entire heat medium is
【００１６】 [0016]
【００１７】[0017]
【発明の効果】上記のように、本発明によれば、熱媒体
総量Ｇ (kg) が変動しても、氷蓄熱槽内の氷量を正確に
測定することができる。As described above, according to the present invention, the amount of ice in the ice heat storage tank can be accurately measured even when the total amount of heat medium G (kg) fluctuates.
【図１】本発明に係る氷蓄熱槽内の氷量測定装置の概略
図である。FIG. 1 is a schematic diagram of an apparatus for measuring the amount of ice in an ice heat storage tank according to the present invention.
１ 氷蓄熱槽 ２ 超音波レベル計 ３ 圧力計 ４ 演算機 ５ 温度計 ６ 屈折率計 DESCRIPTION OF SYMBOLS 1 Ice thermal storage tank 2 Ultrasonic level gauge 3 Pressure gauge 4 Computing machine 5 Thermometer 6 Refractometer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 敬一 千葉県市原市八幡海岸通１番地 三井造 船株式会社 千葉事業所内 (72)発明者 永森 茂 千葉県市原市八幡海岸通１番地 三井造 船株式会社 千葉事業所内 (56)参考文献 特開 昭48−54542（ＪＰ，Ａ) 特開 平３−75426（ＪＰ，Ａ) 特開 平２−309141（ＪＰ，Ａ) 実開 平１−148537（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F24F 5/00 102 ──────────────────────────────────────────────────の Continuing from the front page (72) Keiichi Watanabe, Inventor Keiichi Watanabe, Chiba Pref. (56) References JP-A-48-54542 (JP, A) JP-A-3-75426 (JP, A) JP-A-2-309141 (JP, A) JP-A-1-148537 ( JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) F24F 5/00 102
Claims (1)
の氷蓄熱槽と、氷蓄熱槽の頂部に設けた超音波レベル計
と、氷蓄熱槽の底部に設けた圧力計と、氷蓄熱槽内の熱
媒体温度を測定する温度計と前記熱媒体の濃度を測定す
る屈折率計と、前記超音波レベル計、圧力計、温度計及
び屈折率計と電気的に接続された演算機とから成り、演
算機が氷蓄熱槽の断面積Ａ (cm2 ) と圧力計から入力し
た槽底部の圧力Ｐ (kg／cm2 ) から求めた熱媒体総量Ｇ
(kg) と、熱媒体の濃度Ｃ (wt％) と温度Ｔ (℃) から
求めた熱媒体の密度ρb と、超音波レベル計から入力し
た熱媒体の深さ (cm) と、から槽内の氷の重量ＧI (k
g) を演算する機能を備えていることを特徴とする氷蓄
熱槽内の氷量測定装置。1. A sectional area A (cm 2 ) in which the total amount of the heat medium fluctuates.
An ice heat storage tank, an ultrasonic level meter provided at the top of the ice heat storage tank, a pressure gauge provided at the bottom of the ice heat storage tank, a thermometer for measuring the temperature of the heat medium in the ice heat storage tank, and the heat medium. It comprises a refractometer for measuring the concentration, and a calculator electrically connected to the ultrasonic level gauge, pressure gauge, thermometer and refractometer, wherein the calculator is a cross-sectional area A (cm 2 ) And the total amount of heat medium G calculated from the pressure P (kg / cm 2 ) at the bottom of the tank input from the pressure gauge
(kg), the density ρ b of the heat medium obtained from the concentration C (wt%) of the heat medium and the temperature T (° C.), and the depth (cm) of the heat medium input from the ultrasonic level meter. weight G I (k of ice on the inner
g) A device for measuring the amount of ice in an ice storage tank, which has a function of calculating
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322792A JP3263144B2 (en) | 1992-09-22 | 1992-09-22 | Ice amount measurement device in ice thermal storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322792A JP3263144B2 (en) | 1992-09-22 | 1992-09-22 | Ice amount measurement device in ice thermal storage tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06109289A JPH06109289A (en) | 1994-04-19 |
| JP3263144B2 true JP3263144B2 (en) | 2002-03-04 |
Family
ID=17248341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25322792A Expired - Fee Related JP3263144B2 (en) | 1992-09-22 | 1992-09-22 | Ice amount measurement device in ice thermal storage tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3263144B2 (en) |
-
1992
- 1992-09-22 JP JP25322792A patent/JP3263144B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06109289A (en) | 1994-04-19 |
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