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  2. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    The heat pump itself can be improved by increasing the size of the internal heat exchangers, which in turn increases the efficiency (and the cost) relative to the power of the compressor, and also by reducing the system's internal temperature gap over the compressor. Obviously, this latter measure makes some heat pumps unsuitable to produce ...

  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. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm space. [1] In winter a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house to the warmer outdoors in summer.

  5. Rankine cycle - Wikipedia

    en.wikipedia.org/wiki/Rankine_cycle

    The actual vapor power cycle differs from the ideal Rankine cycle because of irreversibilities in the inherent components caused by fluid friction and heat loss to the surroundings; fluid friction causes pressure drops in the boiler, the condenser, and the piping between the components, and as a result the steam leaves the boiler at a lower ...

  6. Affinity laws - Wikipedia

    en.wikipedia.org/wiki/Affinity_laws

    The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

  7. Lennox International - Wikipedia

    en.wikipedia.org/wiki/Lennox_International

    Previous logo. The company was founded in 1895, in Marshalltown, Iowa, by Dave Lennox, the owner of a machine repair business for railroads. [1] Inventors Ezra William Smith and Ernest Bryant brought their idea for a riveted steel coal-fired furnace to his machine shop to build parts for a prototype.

  8. Dave Duncan (writer) - Wikipedia

    en.wikipedia.org/wiki/Dave_Duncan_(writer)

    Duncan was a prolific writer and penned over fifty books. [ 8 ] [ 9 ] His sixth book, West of January , won the 1990 Aurora award , an award he would win again in 2007 for Children of Chaos . [ 10 ] [ 11 ] He was a member of SF Canada [ 12 ] and in 2015 he was inducted into the Canadian Science Fiction and Fantasy Hall of Fame.

  9. Ella Du Cane - Wikipedia

    en.wikipedia.org/wiki/Ella_Du_Cane

    Ella Du Cane came into artistic prominence in 1893 when she exhibited at an exhibition of the prestigious New Society of Painters in Water Colours. [4] Queen Victoria took a personal interest in her work, acquiring 26 of Du Cane's works between December 1895 and August 1898.