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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. Pumpjack - Wikipedia

    en.wikipedia.org/wiki/Pumpjack

    A diagram of a pumpjack. A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1]It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface.

  4. 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.

  5. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Because the ground is a constant temperature source, a ground-source heat pump is not subjected to large temperature fluctuations, and therefore is the most energy-efficient type of heat pump. [ 54 ] The "seasonal coefficient of performance" (SCOP) is a measure of the aggregate energy efficiency measure over a period of one year which is ...

  6. Submersible pump - Wikipedia

    en.wikipedia.org/wiki/Submersible_pump

    Submersible pump cables are electrical conductors designed for use in wet ground or under water, with types specialized for pump environmental conditions. [5] [6] [7] A submersible pump cable is a specialized product to be used for a submersible pump in a deep well, or in similarly harsh conditions.

  7. Does college football have a flag-planting problem? 'Our ...

    www.aol.com/sports/does-college-football-flag...

    After this year’s 34-3 win over the Sooners, Texas players carried out a more specific flag-planting routine at midfield. They stabbed the flag pole through a No. 6 Oklahoma jersey belonging to ...

  8. America’s biggest private company is laying off thousands of ...

    www.aol.com/america-biggest-private-company...

    Cargill, the megasized Minnesota-based food production giant, is laying off about 5% of its global workforce as food commodity prices drop. Cargill is America’s largest privately held company ...

  9. Hand pump - Wikipedia

    en.wikipedia.org/wiki/Hand_pump

    Where it is necessary to raise water to a height above that to which a suction or lift pump will operate effectively (about 7 metres), or to raise the pressure so that it will exit a nozzle with a strong force, such as through a fire hose, a force pump may be used. As with a suction pump, in its manual form it relies on an operator to pump a ...

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