A Guide to Heat Pumps

The heat pump is a heat exchanger device. The components of the heat exchanger include the compressor, condenser, evaporator and the expansion valve. The articles linked here clearly explain the basic concepts of heat pump systems used in home heating and cooling and HVAC. They relate how to the use of the heat pump in the geothermal heating system, how components are arranged inside the heat pump, and how a reversed air condition can be used as a heater in the winter.