Refrigeration Cycles Flashcards
1
Q
What is the Clasius Statement?
A
It is impossible to construct a device which operates on a cycle and produces no other effect than the heat transfer from a cooler body to a hotter body
2
Q
What are the steps for an ideal vapour-compression refrigeration cycle?
A
- 1-2 Isentropic compression in a compressor
- 2-3 Constant-Pressure heat rejection in a condenser
- 3-4 Throttling in an expansion device
- 4-1 Constant-Pressure heat absorption in an evaporator
3
Q
What is the coefficient of performance of a refrigerator?
A
COP = Ql / (Qh - Ql)
4
Q
What is the Carnot COP of a refrigerator?
A
Tl / (Th - Tl)
