A two-stage vapor compression refrigeration system similar to the system in Fig. 10.10 of the textbook employs R134a as the working fluid. The intermediate system pressure is 6 bar, and the condenser operates at 12 bar. The high- and low- pressure expansion valves receive saturated liquid at 12 and 6 bars of pressure respectively. The first stage compressor receives saturated vapor at 10℃. Assume that the refrigeration capacity is 10 tons, and the compressors operate isentropically. Find: the coefficient of performance. the compressor power input, in kW.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A two-stage vapor compression refrigeration system similar to the system in Fig. 10.10 of the textbook employs R134a as the working fluid. The intermediate system pressure is 6 bar, and the condenser operates at 12 bar. The high- and low- pressure expansion valves receive saturated liquid at 12 and 6 bars of pressure respectively. The first stage compressor receives saturated vapor at 10℃. Assume that the refrigeration capacity is 10 tons, and the compressors operate isentropically. Find:

  1. the coefficient of performance.
  2. the compressor power input, in kW.

 
(1)
రెంయం
Expansion
valve
Compressor
(1)
6-
3+(1)
Direct-contact
bcat cxchanger
Flash
chamber
2-(1-x)
7.
(1-)
7.
Compr
Expansion
valve
Evaporator
Transcribed Image Text:(1) రెంయం Expansion valve Compressor (1) 6- 3+(1) Direct-contact bcat cxchanger Flash chamber 2-(1-x) 7. (1-) 7. Compr Expansion valve Evaporator
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