May 2011
Beginner
492 pages
14h 16m
English
Content preview from Heat and Thermodynamics
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7.14 Refrigerating Mechanism
It is the mechanism of artificially maintaining a reservoir at a fixed desired temperature lower than that of the surrounding which is done by extracting heat from a cold reservoir with as little work as possible, applied externally. If a device takes heat Q2 from cold body at temperature T2 and gives out heat Q1 to the surrounding or hot body at temperature T1, the excess of heat Q1 over Q2 is the work W applied on the device, then the coefficient of performance is defined as
At temperatures above 10°C, bacteria increase greatly at a rapid rate. Food materials such as cooked food or raw materials such as fish, ...
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