Compute the following: a. Refrigerating capacity of the system (kW) b. Intermediate pressure (Pa) p, =\P,P. where p. = suction pressure of low-stage compressor, pa = discharge pressure of high-state compressor, pi = intercooler pressure

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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 A two-stage R-22 system uses flash-gas remoal and intercooling as in the previous problem. The
evaporating temperature is -40 C and the condensing temperature is 30 C. The pumping capacity of the
high and low stage compressors is shown below: 

(from picture solve a and b)

4
High-stage compressor
Low-stage compressor
200
300
400
500
600
Intermediate pressure, kPa
(Note: for above figure, suction pressure of low-stage compressor = 105 kPa (-40 °C), discharge pressure
of the high-side compressor =1192 kPa (30 °C)
Compute the following:
a. Refrigerating capacity of the system (kW)
b. Intermediate pressure (Pa) p, =\P,P. where p. = suction pressure of low-stage
compressor, pa = discharge pressure of high-state compressor, pi = intercooler pressure
Pumping capacity, kg/s
Transcribed Image Text:4 High-stage compressor Low-stage compressor 200 300 400 500 600 Intermediate pressure, kPa (Note: for above figure, suction pressure of low-stage compressor = 105 kPa (-40 °C), discharge pressure of the high-side compressor =1192 kPa (30 °C) Compute the following: a. Refrigerating capacity of the system (kW) b. Intermediate pressure (Pa) p, =\P,P. where p. = suction pressure of low-stage compressor, pa = discharge pressure of high-state compressor, pi = intercooler pressure Pumping capacity, kg/s
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