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  2. Dilution refrigerator - Wikipedia

    en.wikipedia.org/wiki/Dilution_refrigerator

    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. [ 1 ] [ 2 ] The cooling power is provided by the heat of mixing of the helium-3 and helium-4 isotopes.

  3. Whirlpool - Wikipedia

    en.wikipedia.org/wiki/Whirlpool

    A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. [ 1 ] [ clarification needed ] Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms ( / ˈ m eɪ l s t r ɒ m , - r ə m / MAYL -strom, -⁠strəm ).

  4. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    A refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is 3 to 5 °C (37 to 41 °F). [3] A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents’ temperature below the freezing point of water. [4]

  5. Whirlpool Corporation - Wikipedia

    en.wikipedia.org/wiki/Whirlpool_Corporation

    Whirlpool Corporation is an American multinational manufacturer and marketer of home appliances headquartered in Benton Charter Township, Michigan, United States. [2] In 2023, the Fortune 500 company had an annual revenue of approximately $19 billion in sales, around 59,000 employees, and more than 55 manufacturing and technology research centers globally.

  6. Absorption refrigerator - Wikipedia

    en.wikipedia.org/wiki/Absorption_refrigerator

    An absorption refrigerator changes the gas back into a liquid using a method that needs only heat, and has no moving parts other than the fluids. 1: boiler 2: separation chamber 3: ammonia-poor water back-pipe 4: ammonia condense 5: pressure balance pipe 6: liquid ammonia pipe 7: evaporator (inside cabinet) 8: ammonia gas pipe 9: absorber ...

  7. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes

  8. Cascade refrigeration - Wikipedia

    en.wikipedia.org/wiki/Cascade_refrigeration

    A two-cycle cascade refrigeration process schematic diagram. A cascade refrigeration cycle is a multi-stage thermodynamic cycle. An example two-stage process is shown at right. (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers. [1]

  9. Refrigeration - Wikipedia

    en.wikipedia.org/wiki/Refrigeration

    The use of gas eliminated the need for an electric compressor motor and decreased the size of the refrigerator. However, electric companies that were customers of GE did not benefit from a gas-powered unit. Thus, GE invested in developing an electric model. In 1927, GE released the Monitor Top, the first refrigerator to run on electricity. [35]

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