Electrochemically driven phase transformation for high-efficiency heat pumping

Junyoung Kim, Abhiroop Mishra, James E. Braun, Eckhard A. Groll, Joaquin Rodríguez-López, Davide Ziviani

Research output: Contribution to journalArticlepeer-review


To reduce energy consumption and improve energy utilization in space conditioning, advanced heat pumping technologies are needed. The chemical looping heat pump (CLHP) is a promising thermodynamic cycle that has theoretically shown the potential to achieve a cooling coefficient of performance (COPc) increase of over 20% relative to conventional vapor compression systems. In this paper, the key process of the CLHP is experimentally demonstrated, and the system performance and non-ideal behavior are predicted using the component-level models. The results show the feasibility of electrochemical phase change of a working fluid; the peak COPc was 7.64 with a cooling capacity of 3.6 mW (cooling density of 2.57 W m−2) at both sink and source temperature of 23°C based on laboratory experiments. The COPc can theoretically reach up to 13 at a temperature lift of 15°C as long as an electrochemical cell can achieve a greater degree of conversion.

Original languageEnglish (US)
Article number101369
JournalCell Reports Physical Science
Issue number4
StatePublished - Apr 19 2023


  • air conditioning
  • chemical looping heat pump
  • electrochemical
  • heat pump
  • not-in-kind technology

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • General Engineering
  • General Energy
  • General Physics and Astronomy


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