Heat Energy Storage based on Reversible Chemical Reactions : Part 3-Temperature Field in Reactant under Energy Storage Process and its Application for Detection to the Completion of the Reaction

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  • FUJII Iwane
    Department of Mechanical Engineering, Faculty of Engineering, Meiji University

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Other Title
  • 可逆的化学反応サイクルによる蓄熱法 : 第3報-吸熱化学反応蓄熱過程における蓄熱物質内温度挙動と反応度検知への応用
  • 可逆的化学反応サイクルによる蓄熱法-3-吸熱化学反応蓄熱過程における蓄熱物質内温度挙動と反応度検知への応用
  • カギャクテキ カガク ハンノウ サイクル ニヨル チクネツホウ 3 キュウネツ

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Classifying roughly, thermal energy storage can be accomplished in two ways; by means of sensible or latent heat of material and by means of chemical energy formed through reversible thermo-chemical reaction. Though it is not long since the latter method first suggested, the methods of this type have attacted special interest recently, because of being competent for long-term storing. Now, the characteristic of the storage in chemical form is, not to mention, to be able to store the energy under room temperature, which is much different from the cases of sensible or latent heat storage. Therefore it is difficult to estimate energy storage quantity under energy-storing state, which compels us to make the estimation in the process of endothermic chemical reaction, namely, in energy storing process by measuring weight transition of the reactant, for instance. Of cource, this estimation method is said to be one which gives fairly good measuring for its simplicity. However, the above seems to be unsuitable on the stage of practical application on account of abundant storage material. Nevertheless, detection to energy storage quantity is also necessary to avoid unuseful heating of storage material. Under these circumstances, in this paper a detection by temperature mesurement is suggested and is proved to be promising by showing the relation of temperature fields and endothermic chemical reaction of reactant under energy storing process. Furthermore, theoretical analysis is performed for the temperature fields to confirm propriety of the fields obtained by experiments.

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