Question: 1 (12 points): An ideal vapor compression refrigeration cycle using R-134a, operates with an evaporating temperature of -20 F and condensing temperature of 60 F.
1 (12 points): An ideal vapor compression refrigeration cycle using R-134a, operates with an evaporating temperature of -20 F and condensing temperature of 60 F. The refrigerant leaves the evaporator as a saturated vapor and leaves the condenser as a saturated liquid. Determine the following assuming one-ton of refrigeration capacity: a) Refrigeration effect (Btu/Ib). b) Mass flow rate (Ib/min). c) Heat of compression (Btu/Ib). d) Heat of rejection (Btu/Ib). e) Theoretical compressor power in (Btu/min), in (hp/ton) and in (kW/ton). f) Theoretical compressor displacement (CFM/ton). g) Percentage of flash gas. h) COP. i) EER (Btu/W-hr). j) Using the value of COP, evaluate the compressor power in (hp/ton) and in (kW/ton). k) Refrigerating efficiency
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