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Calculate Refrigeration State Quality and Refrigeration Cycle

Question

Consider the T-S diagram of a refrigerator unit. The working flid is R-22. The refrigerator operates between a low pressure of 0.60 bar absolute (measured in the evaporator) and high pressure of 18.0 bar absolute (measured in the condenser). Assume negligible pressure loss in either condenser (path 1 -> 2) or the evaporator (path 3-> 4). A throttle controls the pressure change between states 2 and 3. A perfectly insulated compressor provides the work for the cycle (Path 4->1). The quality of state 2 is 0.00 and the quality of state 4 is 1.00.

 

1) What is the quality of state 3?

2) While the cycle is internally reversible, is the cycle plus surroundings completely reversible? Briefly explain.  

Summary    

The question belongs to Chemical Engineering and it is about refrigeration unit. The unit operates at low pressure of 0.60 bar and high pressure of 18 bar. The questions are about the quality of state 3 and whether or not the cycle and its surrounding completely reversible.

Note: The solution is in handwritten format



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