Search results
Results from the WOW.Com Content Network
Less work is required to move heat than for conversion into heat, and because of this, heat pumps, air conditioners and refrigeration systems can have a coefficient of performance greater than one. The COP is highly dependent on operating conditions, especially absolute temperature and relative temperature between sink and system, and is often ...
Ice packs are used in coolers to keep perishable foods (especially meats, dairy products, eggs, etc.) below the 5–75 °C (41–167 °F) danger zone when outside a refrigerator or freezer, and to keep drinks pleasantly cool.
One should not confuse thermal efficiency with other efficiencies that are used when discussing engines. The above efficiency formulas are based on simple idealized mathematical models of engines, with no friction and working fluids that obey simple thermodynamic rules called the ideal gas law. Real engines have many departures from ideal ...
Domestic refrigerators and freezers for food storage are made in a range of sizes. Among the smallest are Peltier-type refrigerators designed to chill beverages. A large domestic refrigerator stands as tall as a person and may be about one metre (3 ft 3 in) wide with a capacity of 0.6 m 3 (21 cu ft).
Coca-Cola has fielded CO 2-based beverage coolers and the U.S. Army is considering CO 2 refrigeration. [ 64 ] [ 65 ] Due to the need to operate at pressures of up to 130 bars (1,900 psi; 13,000 kPa), CO 2 systems require highly resistant components, however these have already been developed for mass production in many sectors.
AOL Mail is free and helps keep you safe. ... Should you need additional assistance we have experts available around the clock at 800-730-2563.
AOL latest headlines, entertainment, sports, articles for business, health and world news.
Portable Ice Chest, U.S. Patent # 2,663,167 (1953) A cooler, portable ice chest, ice box, cool box, [1] chilly bin (in New Zealand), or esky is an insulated box used to keep food or drink cool. Ice cubes are most commonly placed in it to help the contents inside stay cool.