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2. 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]

3. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   An international milestone is the heat pump built by Escher Wyss in 1937/38 to replace the wood stoves in the City Hall of Zurich. To avoid noise and vibrations, a recently developed rotary piston compressor was used. This historic heat pump heated the town hall for 63 years until 2001. Only then was it replaced by a new, more efficient heat ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Electrical heaters are often used as backup or supplemental heat for heat pump systems. The heat pump gained popularity in the 1950s in Japan and the United States. [14] Heat pumps can extract heat from various sources, such as environmental air, exhaust air from a building, or from the ground. Heat pumps transfer heat from outside the ...

5. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   The heat pump unit contains an evaporator, compressor, condenser, and expansion valve. [33] Thermal energy is extracted from the ground through an antifreeze solution in the GHE, transferred to the refrigerant in the heat pump, and compressed before being delivered to a refrigerant-to-air heat exchanger. A fan then circulates the heated air ...

6. Category:Heat pumps - Wikipedia

   en.wikipedia.org/wiki/Category:Heat_pumps

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

7. Thermostat - Wikipedia

   en.wikipedia.org/wiki/Thermostat

   The majority of modern heating/cooling/heat pump thermostats operate on low voltage (typically 24 volts AC) control circuits. The source of the 24 volt AC power is a control transformer installed as part of the heating/cooling equipment.

8. Pat Riley says Heat are not trading Jimmy Butler - AOL

   www.aol.com/pat-riley-says-heat-not-190552693.html

   Butler has career averages of 18.3 points, 5.4 rebounds and 4.3 assists in 834 games (729 starts) with the Chicago Bulls (2011-17), Minnesota Timberwolves (2017-18), Philadelphia 76ers (2018-19 ...

9. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.