Reaction durability of a magnesium oxide/water chemical heat pump system

IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203) Pub Date : 1997-12-31 DOI:10.1109/IECEC.1997.661947

Y. Kato, Wataru Nanmoku, F. Takahashi, Y. Yoshizawa

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Abstract

Magnesium oxide/water chemical heat pump system was studied experimentally to demonstrate the durability for repetitive operation. The results showed that this heat pump had a practical performance for a heat storage system from viewpoints of durability to repetitive operation and heat output. The reactivity of a reactor bed was kept during ten times of repetitive reactions except a lowering of reactivity in initial three reaction cycles. From the reactivity change during whole cycles, it was surmised that this material had enough durability for dozens of times of repetition. The system was able to store thermal energy at about 430/spl deg/C and to supply thermal energy at about 85-125/spl deg/C as a heat amplifier type heat pump, and the heat output power exceeded 50 W per 1 kg of initial magnesium hydroxide during 40-60 minutes. The results of experiments and simulations showed that the heat pump had enough thermal storage capacity and thermal power as a practical system.

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氧化镁/水化学热泵系统的反应耐久性

对氧化镁/水化学热泵系统进行了实验研究，以验证其重复运行的耐久性。结果表明，该热泵从耐用性、重复运行和热量输出等方面都具有较好的储热性能。反应器床的反应性在10次重复反应中保持不变，但在最初的3次反应循环中反应性有所降低。根据整个循环过程中反应性的变化，推测该材料具有足够的耐久性，可以重复几十次。该系统能够储存约430/spl℃的热能，并作为热放大器型热泵提供约85-125/spl℃的热能，在40-60分钟内，每千克初始氢氧化镁的热输出功率超过50 W。实验和仿真结果表明，该热泵作为一种实用的系统具有足够的蓄热能力和热功率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203)

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