Study on Compact and High Power Storage System by Means of a Liquid-Solid Reaction System using CaCl<sub>2 </sub>and Water for a Motive Use

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  • CaCl<sub>2 </sub>を用いた液固反応による移動体向け高出力高密度蓄熱システムの放熱基礎特性
  • CaCl₂を用いた液固反応による移動体向け高出力高密度蓄熱システムの放熱基礎特性
  • CaCl ₂ オ モチイタ エキコハンノウ ニ ヨル イドウタイ ムケ コウシュツリョク コウミツドチクネツ システム ノ ホウネツ キソ トクセイ

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In this study, we have developed a heat storage system, which is able to store waste heat and release it to an appropriate heating equipment elsewhere, in order to improve utility of waste heat and thus reduce environmental pollutants. The heat of solution of a solid-liquid reaction was adopted for the heat storage system. In this system, the reactant was also used as heat transfer medium and being sent to heating parts. Therefore, the evaporator that has been used in conventional chemical heat storage can be omitted to reduce the device size and for motive use. The heat value, heat release rate and cyclic performance of CaCl2/H2O system were measured. The results indicated that the heat of solution was proportional to the mass concentration as far as the reaction reached its saturation solubility under ambient temperature. In addition, the heat value per unit mass was higher at lower concentration than that at higher concentration. During the first 1 minute, the heat output of 5.06kW/L- H2O was obtained for CaCl2 (s) /H2O (l) when the reaction reached its saturated solubility. It was found no degradation in chemical composition after 50 times of cyclic operation.

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