Kuwata, K., Esaki, T., Yasuda, M., Matsuda, T., Kobayashi, N. and Shiren, Y. (2017) Durability of Thermochemical Heat Storage Demonstrated through Long-Term Repetitive CaCl2/H2O Reversible Reactions. Journal of Renewable and Sustainable Energy, 9, Article ID: 024102.
https://doi.org/10.1063/1.4978351

has been cited by the following article:

• TITLE: Experimental Evaluation of the Heat Output/Input and Coefficient of Performance Characteristics of a Chemical Heat Pump in the Periodic Operation of CaCl2 Hydration

  AUTHORS: Atsuhiro Ichinose, Kazuki Kuwata, Takehiro Esaki, Takayuki Matsuda, Noriyuki Kobayashi

  KEYWORDS: Chemical Heat Pump, CaCl2/H2O Hydration Reaction, Heat Pump Cycle, Coefficient of Performance

  JOURNAL NAME: Journal of Materials Science and Chemical Engineering, Vol.8 No.11, November 17, 2020

  ABSTRACT: We herein evaluate the use of a chemical heat pump (CHP) for upgrading waste heat. CaCl2 was used in the system of CHP. We evaluated the heat storage and heat releasing of CHP, and confirmed the practicality from the experimental results. The reactor module employed was an aluminum plate-tube heat exchanger with corrugated fins, and the CaCl2 powder was in the form of a packed bed. Heat storage operation and heat dissipation operation are performed at the same time and supplied to the heat demand destination. At this time, an environmental heat source can be used during the heat radiation operation, and the heat output can release more heat than the heat input during heat storage. The heat discharging and charging characteristics of the reactor module were evaluated experimentally. The coefficient of performance (COP) was calculated for the heat upgrading cycle, and the heat output in the system was determined. A COP of 1.42 and output of 650 W/L, based on the heat exchanger volume, were obtained using a 600 s change time for the heat pump.