Absorption heat pumps use an ammonia-water absorption cycle, as an alternative to a vapor-compression cycle, to transfer heat. Ammonia would be the refrigerant, and water will be the absorber. The ammonia condenses at one of the technique’s coils to launch heat and evaporates at the opposite coil to soak up https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/