Refrigerator |
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A refrigerator takes heat from a cold place and
Heat Q1 is taken from the cold place and heat Q2 is expelled to the hot place. Q2 is larger than Q1. The difference is the work input to the system DW. Q1 is less than DW and the fact that Q2 is bigger than Q1 is unfortunate, especially in Bangkok, where we would like to avoid heating the kitchen! The coefficient of performance for a refrigerator is defined as the heat removed from the cold box (Q1) divided by the energy input to the refrigerator (DW) [the energy we have to pay for].  A Carnot refrigerator has the highest possible coefficient. |
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moves it to a hot
place.