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2. Absorption refrigerator - Wikipedia

   en.wikipedia.org/wiki/Absorption_refrigerator

   Common absorption refrigerators use a refrigerant with a very low boiling point (less than −18 °C (0 °F)) just like compressor refrigerators.Compression refrigerators typically use an HCFC or HFC, while absorption refrigerators typically use ammonia or water and need at least a second fluid able to absorb the coolant, the absorbent, respectively water (for ammonia) or brine (for water).

3. 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.

4. Auto-defrost - Wikipedia

   en.wikipedia.org/wiki/Auto-defrost

   Instead, they use an independent cooling system (for example: an evaporator coil with a defrost heater and a circulating fan in the freezer and a cold-plate or open-coil evaporator in the refrigerator. "Frost-Free" refrigerator/freezer units usually use a heating element to defrost their evaporators, a pan to collect and evaporate water from ...

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6. Refrigerant - Wikipedia

   en.wikipedia.org/wiki/Refrigerant

   The R- numbering system was developed by DuPont (which owned the Freon trademark), and systematically identifies the molecular structure of refrigerants made with a single halogenated hydrocarbon. ASHRAE has since set guidelines for the numbering system as follows: [85] R-X 1 X 2 X 3 X 4. X 1 = Number of unsaturated carbon-carbon bonds (omit if ...

7. Walmart's Cyber Monday deals are extended — here are 10 you ...

   www.aol.com/lifestyle/walmarts-cyber-monday...

   We've spent the last week covering just about Cyber Monday deal we thought our AOL readers would love: orthopedic sneakers at 50% off, $20 Sam's Club memberships, and even sweaters you can get ...

8. The world’s ‘winter depression hotspots’ may surprise you ...

   www.aol.com/finance/world-winter-depression...

   When temperatures drop and sweater weather is in full swing, some people may begin to notice they feel down and not as engaged with the world around them—in part because fewer sunlight hours and ...

9. Refrigerated container - Wikipedia

   en.wikipedia.org/wiki/Refrigerated_container

   Full-size intermodal containers equipped with these "cryogenic" systems can maintain their temperature for the 30 days needed for sea transport. [4] Since they do not require an external power supply, cryogenically refrigerated containers can be stored anywhere on any vessel that can accommodate "dry" (un-refrigerated) ocean freight containers.