@article{kim2023electrochemically,
title = {Electrochemically driven phase transformation for high-efficiency heat pumping},
author = {Junyoung Kim and Abhiroop Mishra and James E. Braun and Eckhard A. Groll and Joaquin Rodr{\'i}guez-L{\'o}pez and Davide Ziviani},
journal = {Cell Reports Physical Science},
volume = {4},
number = {4},
pages = {101369},
year = {2023},
issn = {2666-3864},
doi = {10.1016/j.xcrp.2023.101369},
url = {https://www.sciencedirect.com/science/article/pii/S2666386423001376},
urldate={2023-04-20},
keywords = {heat pump, air conditioning, electrochemical, chemical looping heat pump, not-in-kind technology},
abstract = {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{\degree}C based on laboratory experiments. The COPc can theoretically reach up to 13 at a temperature lift of 15{\degree}C as long as an electrochemical cell can achieve a greater degree of conversion.},
}