New defrosting tech may increase coefficient of performance of air-source heat pumps by up to 11.2%

A group of researchers from the University of Glasgow and the University of Liverpool in the United Kingdom have presented an experimental flexible heat pump concept that can carry out a defrosting operation while avoiding a reduction of heat supply when the refrigerant condenses in the frosted evaporator. The proposed system integrates heat storage based on the conventional Evans-Perkins vapor compression cycle to recover and store part of the heat that exits the condenser during defrosting. The system works in four operation modes and aims to enhance heating efficiency by condensing the refrigerant in the frosted evaporator.

Source:

https://www.pv-magazine.com/2024/09/16/new-defrosting-tech-may-increase-coefficient-of-performance-of-air-source-heat-pumps-by-up-to-11-2/

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