Absorption heat pumps use an ammonia-water absorption cycle, as opposed to a vapor-compression cycle, to transfer heat. Ammonia could be the refrigerant, and water may be the absorber. The ammonia condenses at on the list of program’s coils to launch heat and evaporates at another coil to soak up heat. https://ztndz.com/story25525813/a-review-of-heat-pumps