enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Dilution refrigerator - Wikipedia

    en.wikipedia.org/wiki/Dilution_refrigerator

    The refrigeration process uses a mixture of two isotopes of helium: helium-3 and helium-4.When cooled below approximately 870 millikelvins, the mixture undergoes spontaneous phase separation to form a 3 He-rich phase (the concentrated phase) and a 3 He-poor phase (the dilute phase).

  3. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible. A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator. As a refrigerant passes through a circuit containing these four elements, air ...

  4. Refrigeration - Wikipedia

    en.wikipedia.org/wiki/Refrigeration

    Commercial refrigeration. Refrigeration is any of various types of cooling of a space, substance, or system to lower and/or maintain its temperature below the ambient one (while the removed heat is ejected to a place of higher temperature). [1] [2] Refrigeration is an artificial, or human-made, cooling method. [1] [2]

  5. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

  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. Federal agencies to be closed on Christmas Eve 2024 ... - AOL

    www.aol.com/federal-agencies-closed-christmas...

    On Thursday, President Joe Biden signed an executive order designating Christmas Eve as a federal holiday for most employees.

  8. Jerusalem resident detained for suspected Iranian spy plot - AOL

    www.aol.com/news/jerusalem-resident-detained...

    An Israeli resident of Jerusalem has been arrested on suspicion of being in contact with Iranian intelligence agents as part of a plot to carry out an attack in Israel in return for payment ...

  9. Vapor-compression refrigeration - Wikipedia

    en.wikipedia.org/.../Vapor-compression_refrigeration

    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.