Absorption heat pump

An absorption heat pump is an air-source heat pump driven not by electricity, but by a heat source such as solar-heated water, or geothermal-heated water. Absorption refrigerators also work on the same principle, but are not reversible and cannot serve as a heat source. An absorption heat pump is an air-source heat pump driven not by electricity, but by a heat source such as solar-heated water, or geothermal-heated water. Absorption refrigerators also work on the same principle, but are not reversible and cannot serve as a heat source.