Development of high performance porous solid supported chemical heat storage material and chemical heat pump using that material

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06692
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Energy engineering
• Research Institution: Aichi Institute of Technology
• Principal Investigator: WATANABE Fjio 愛知工業大学, 総合技術研究所, 教授 (70109312)
• Co-Investigator(Kenkyū-buntansha): 架谷 昌信 愛知工業大学, 工学部, 教授 (50021788) ; 小林 敬幸 名古屋大学, 工学研究科, 准教授 (90242883)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 化学蓄熱 / 化学ヒートポンプ / 多孔体担持型蓄熱材 / 酸化カルシウム / カーボン多孔体 / 金属多孔体

Outline of Final Research Achievements

The most important issues in the development of chemical heat pumps using a gas-solid chemical reaction are: reduction in reaction rate due to repeated dehydration reaction and hydration reaction, and the increase in heat transfer resistance due to changes in volume. In this research, two types of porous solid supported chemical heat storage materials are proposed: (1) a carbonaceous porous solid supported CaO, and (2) a porous metal supported Ca(OH)2. The effectiveness of these heat storage materials was evaluated. The following findings were obtained as a result.
Based on (1), it was shown that: with a sample having CaO content of 50 wt% or less, volume expansion due to hydration occurs only in the pores of the porous solid; the hydration reaction ratio is 85% or higher. Based on (2), the carrier ratio for Ca(OH)2 of 40 vol% was obtained. In addition, it was found that for the 10 repeated hydration/dehydration reactions, the hydration reaction ratio was about 80%.

Free Research Field

エネルギー変換工学