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  2. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    In general, heat pumps work most efficiently (that is, the heat output produced for a given energy input) when the difference between the heat source and the heat sink is small. When using a heat pump for space or water heating, therefore, the heat pump will be most efficient in mild conditions, and decline in efficiency on very cold days.

  3. Absorption heat pump - Wikipedia

    en.wikipedia.org/wiki/Absorption_heat_pump

    Natural gas is a common-used heat source, therefore, absorption heat pumps are sometimes called gas-fired heat pumps. [11] Also, when other heat sources heat pumps (waste heat for example) are running at the heating mode, they can meet the overload heating requirements of very cold periods in an efficient manner through additional gas boilers. [6]

  4. High efficiency glandless circulating pump - Wikipedia

    en.wikipedia.org/wiki/High_efficiency_glandless...

    Three different high efficiency glandless circulating pumps designed and developed by the company Wilo. A high efficiency glandless circulating pump is a component of a heating and air conditioning system that allows the system to perform with increased efficiency while significantly reducing the system's electrical usage.

  5. Grundig - Wikipedia

    en.wikipedia.org/wiki/Grundig

    In 2004 the UK's Alba plc and the Turkish Koç's Beko jointly took over Grundig Home InterMedia System, Grundig's consumer electronics division. In 2007 Alba sold its half of the business to Koç for US$50.3 million, [ 15 ] although it retained the license to use the Grundig brand in the UK until 2010, and in Australasia until 2012.

  6. 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]

  7. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    The coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. [1] [2] Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. The COP is used in thermodynamics.

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