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  2. Auto-defrost - Wikipedia

    en.wikipedia.org/wiki/Auto-defrost

    "Frost-Free" refrigerator/freezer units usually use a heating element to defrost their evaporators, a pan to collect and evaporate water from the frost that melts from the cold plate and/or evaporator coil, a timer which turns off the compressor and turns on the defrost element usually from once to 4 times a day for periods usually ranging from ...

  3. Why sudden loud booms sometimes occur when it's very cold outside

    www.aol.com/weather/why-sudden-loud-booms...

    During extreme cold events, you may hear a loud boom and feel like you have experienced an earthquake. ... However, this event was more likely a cryoseism, also known as an ice quake or a frost ...

  4. Mpemba effect - Wikipedia

    en.wikipedia.org/wiki/Mpemba_effect

    The phenomenon, when taken to mean "hot water freezes faster than cold", is difficult to reproduce or confirm because it is ill-defined. [4] Monwhea Jeng proposed a more precise wording: "There exists a set of initial parameters, and a pair of temperatures, such that given two bodies of water identical in these parameters, and differing only in initial uniform temperatures, the hot one will ...

  5. List of unexplained sounds - Wikipedia

    en.wikipedia.org/wiki/List_of_unexplained_sounds

    It was investigated by Canadian military authorities, who did not detect any anomalies on the seabed, where the sound originated. Possible causes include local sonar surveys or the acoustics of Arctic ice. [13] The Forest Grove Sound, a sound heard in Forest Grove, Oregon during February 2016. Suspected to be a faulty piece of mechanical ...

  6. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    The 1950s and 1960s saw technical advances like automatic defrosting and automatic ice making. More efficient refrigerators were developed in the 1970s and 1980s, even though environmental issues led to the banning of very effective (Freon) refrigerants. Early refrigerator models (from 1916) had a cold compartment for ice cube trays.

  7. 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.

  8. Kelvinator - Wikipedia

    en.wikipedia.org/wiki/Kelvinator

    Kelvinator ad from 1920 Kelvinator refrigerator, c. 1926 The enterprise was established on September 18, 1914, in Detroit , Michigan , United States, by engineer Nathaniel B. Wales , who introduced his idea for a practical electric refrigeration unit for the home to Edmund Copeland and Arnold Goss.

  9. Thermoacoustic heat engine - Wikipedia

    en.wikipedia.org/wiki/Thermoacoustic_heat_engine

    Creating or moving heat from a cold to a warm reservoir requires work. Acoustic power provides this work. The stack creates a pressure drop. Interference between the incoming and reflected acoustic waves is now imperfect. The difference in amplitude causes the standing wave to travel, giving the wave acoustic power.

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