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  2. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

  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. Inverter compressor - Wikipedia

    en.wikipedia.org/wiki/Inverter_compressor

    Typical load profile in a building. Many refrigeration and air conditioning systems require reliable processes; The cooling requirements vary over a wide range during the day and over the year due to ambient conditions, occupancy and use, lighting, etc.

  5. Thermoelectric cooling - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_cooling

    Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current.

  6. Dilution refrigerator - Wikipedia

    en.wikipedia.org/wiki/Dilution_refrigerator

    Schematic diagram of a cryogen-free, or dry, dilution refrigerator precooled by a two-stage pulse tube refrigerator, indicated by the dotted rectangle. A 3 He/ 4 He dilution refrigerator is a cryogenic device that provides continuous cooling to temperatures as low as 2 mK, with no moving parts in the low-temperature region.

  7. US stocks fall sharply and Dow tumbles 1,100 points ... - AOL

    www.aol.com/stock-market-today-asian-stocks...

    U.S. stocks tumbled to one of their worst days of the year after the Federal Reserve hinted Wednesday it may deliver fewer shots of adrenaline for the U.S. economy in 2025 than earlier thought.

  8. Pittsburgh Pirates present outrageous offer in exchange for ...

    www.aol.com/sports/pittsburgh-pirates-present...

    Hidden in the latest round of Topps baseball cards is a particular gem: A completely unique, autographed MLB Debut rookie card for star Pittsburgh Pirates pitcher Paul Skenes.

  9. Vapor-compression refrigeration - Wikipedia

    en.wikipedia.org/wiki/Vapor-compression...

    A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.

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