Abstract
A new electrochemical heat pump using a combination of an electrolytic reaction at lower temperature to absorb low grade thermal energy and a thermochemical reaction at higher temperature to produce more efficient thermal energy is proposed. At a lower temperature, an endothermic reaction which cannot occur thermochemically proceeds with electrolysis. At a higher temperature, an exothermic reaction which is the reverse of the electrolysis reaction occurs thermochemically to produce high grade thermal energy. The water gas shift reaction, CO2(g) + H2(g) ⇌ CO(g) + H2O(g), in molten carbonate is one possible candidate for the new electrochemical heat pump and can lead to an increase in the temperature of the thermal energy from 1100 to 1200 K. A heat pump system using the shift reaction is also considered theoretically.
Similar content being viewed by others
References
H. Kameyama, M. Yamashita and Y. Saito, Catalyst 31 (1989) 285.
H. Kameyama, Refrigeration 71 (1996) 476.
G. Kreysa and G.F. Darbyshire, Electrochim. Acta 35 (1990) 1283.
L. Dittmar, K. Juttner and G. Kreysa, in `Electrochemical Engi-neering and Energy' (Plenum Press, 1994), pp. 57–65.
P.C. Ford, in `Electrochemical and Electrocatalytic Reactions of Carbon Dioxide' (edited by B.P. Sullivan), Elsevier, Oxford, 1993), chapter 3.
P.G.P. Ang and A.F. Sammells, J. Electrochem. Soc. 127 (1980) 1287.
T. Nishina, M. Takahashi and I. Uchida, J. Electrochem. Soc. 137 (1990) 1112.
I. Barin, `Thermochemical Data of Pure Substances', 3rd edn. Vol. 1 (VCH, Weinheim, 1995).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ishihara, A., Motohira, N., Ota, K. et al. High temperature electrochemical heat pump using water gas shift reaction. Part I: Theoretical considerations. Journal of Applied Electrochemistry 29, 1079–1084 (1999). https://doi.org/10.1023/A:1003689519081
Issue Date:
DOI: https://doi.org/10.1023/A:1003689519081