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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]
A bagel (Yiddish: בײגל, romanized: beygl; Polish: bajgiel [ˈbajɡʲɛl] ⓘ; also spelled beigel) [1] is a bread roll originating in the Jewish communities of Poland. [2] Bagels are traditionally made from yeasted wheat dough that is shaped by hand into a torus or ring, briefly boiled in water, and then baked. The result is a dense, chewy ...
The operating principle of the refrigeration cycle was described mathematically by Sadi Carnot in 1824 as a heat engine. The most common types of refrigeration systems use the reverse-Rankine vapor-compression refrigeration cycle, although absorption heat pumps are used in a minority of applications. Cyclic refrigeration can be classified as:
The above systems produce an economizer effect by using compressors, meters, valves and heat exchangers within the refrigeration cycle. In some refrigeration systems the economizer can be an independent refrigeration mechanism. Such is the case of subcooling the liquid line by any other means that draws the heat out of the main system. For ...
Bialys are a breakfast bread winner. This personal portion-sized bread is a flat, round roll that’s perfectly chewy on the inside and crusty on the outside. Sometimes referred to as a “Jewish ...
Isaac’s Bagels have gained a following for their no-frills, New York-style bagels. They’re what Durham’s been waiting for. Isaac’s Bagels sell out for a reason.
Photo: Ronnie Koenig. Design: Eat This, Not That!Grabbing a bagel at Panera is a treat for some and a ritual for others. Among its many soups, salads, and baked goods galore, the chain has a huge ...
The most common refrigeration cycle is the vapor compression cycle, which models systems using refrigerants that change phase. The absorption refrigeration cycle is an alternative that absorbs the refrigerant in a liquid solution rather than evaporating it. Gas refrigeration cycles include the reversed Brayton cycle and the Hampson–Linde cycle.