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1,1,1,2-Tetrafluoroethane is a non-flammable gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12. Retrofit kits are available to convert units that were ...
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).
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.
Subcooling is a key factor in improving the efficiency of refrigeration systems, which has led to extensive research. Systems that operate at higher pressures tend to be more efficient, and compressors used in subcooling loops are generally more efficient than those that cool the liquid refrigerant directly.
KNOXVILLE, Tenn. (AP) — Zee Spearman scored 18 points, including a basket with 12 seconds left, to lead No. 19 Tennessee to an 80-76 win over No. 5 UConn on Thursday night. The Lady Volunteers ...
Now: Anthony Michael Hall. Another Hughes muse, Anthony Michael Hall, is best known for his roles in John's teen classics Sixteen Candles, The Breakfast Club, and Weird Science.At 17, he briefly ...
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