Heat pumps

thumb|Food in a refrigerator with its door open

device that transfers thermal energy in the opposite direction of spontaneous heat transfer

engine powered by a source of heat applied externally to it

single pressure absorption refrigeration

mathematical models of heat pumps and refrigeration

ratio of useful heating or cooling provided to work required

methods of heating and cooling a building using underground heat

Heat pump powered by sound

heat pump that uses air as the heat source / sink

heating and/or cooling system that transfers heat to or from the ground

ventilation system that recovers energy by operating between two air sources at different temperatures

temperature change of a material under an electric field

heat engine

Sanhua Holding Group Co., Ltd. (三花控股集团有限公司) is a global manufacturer of controls and components for the HVAC & Refrigeration home appliance, automotive air conditioning and thermal management industries.

Austrian scientist (1811-1872)