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2. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   In this system the solar thermal panel performs the function of the low temperature heat source and the heat produced is used to feed the heat pump's evaporator. [29] The goal of this system is to get high coefficient of performance ( COP ) and then produce energy in a more efficient and less expensive way.

3. Heat pump and refrigeration cycle - Wikipedia

   en.wikipedia.org/wiki/Heat_pump_and...

   Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

4. Absorption heat pump - Wikipedia

   en.wikipedia.org/wiki/Absorption_heat_pump

   The heat pump system is made up of some main units such as the generator, condenser, evaporator, absorber and heat exchanger, as well as the suction device, shielding pump (solution pump and refrigerant pump). [4] In the simplest case, five heat exchangers are also required (at each component and an internal heat exchanger).

5. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator and is intended to regulate the superheat of the refrigerant that flows out of the evaporator ...

6. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   An air source heat pump can be used to air condition the building during hot weather, and to warm the building using heat extracted from outdoor air in cold weather. Air-source heat pumps are generally uneconomic for outdoor temperatures much below freezing. In colder climates, geothermal heat pumps can be used to extract heat from the ground ...

7. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   The main components of a split-system (called split as there are both inside and outside coils) air source heat pump are: An outdoor evaporator heat exchanger coil, which extracts heat from ambient air; One or more [9] indoor condenser heat exchanger coils. They transfer the heat into the indoor air, or an indoor heating system such as water ...