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A 75-kW refrigeration load is to be carried by an air refrigerating system with a discharge pressure of 1,370 kPa and a refrigerator pressure of 345 kPa. Compression and expansion processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa and the temperature is 32OC. Air temperature leaving the refrigerator is 0OC and entering the compressor is 5OC. Clearance for both compressor and expander is 5%. Draw the (a) Schematic diagram, (b) the P-V diagram and (c) the T-S diagram. Determine (d) the piston displacement of the compressor, (e) the piston displacement of the expand

A 75-kW refrigeration load is to be carried by an air refrigerating system with a discharge pressure of 1,370 kPa and a refrigerator pressure of 345 kPa. Compression and expansion processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa and the temperature is 32OC. Air temperature leaving the refrigerator is 0OC and entering the compressor is 5OC. Clearance for both compressor and expander is 5%. Draw the (a) Schematic diagram, (b) the P-V diagram and (c) the T-S diagram. Determine (d) the piston displacement of the compressor, (e) the piston displacement of the expand

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A 75-kW refrigeration load is to be carried by an air refrigerating system with a discharge

pressure of 1,370 kPa and a refrigerator pressure of 345 kPa. Compression and expansion

processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa

and the temperature is 32OC. Air temperature leaving the refrigerator is 0OC and entering

the compressor is 5OC. Clearance for both compressor and expander is 5%. Draw the

(a) Schematic diagram, (b) the P-V diagram and (c) the T-S diagram. Determine (d) the

piston displacement of the compressor, (e) the piston displacement of the expander,

(f) the net work and (g) the COP

 

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