4. An ammonia refrigerating cycle operates at 247 kPa suction pressure and 1200 kPa condenser pressure. Otherdata are the following:Refrigerating capacityCompressor clearance28 kW5%Compression efficiencyMechanical efficiency80%75%Actual volumetric efficiency74%Determine (a) the clearance volumetric efficiency, (b) the ideal and actual COP, (c) the mass flow rate of ammonia,and (d) the brake work.

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4. An ammonia refrigerating cycle operates at 247 kPa suction pressure and 1200 kPa condenser pressure. Other data are the following: Refrigerating capacity 28 kW Compressor clearance Compression efficiency 5% 80% Mechanical efficiency 75% Actual volumetric efficiency 74% Determine (a) the clearance volumetric efficiency, (b) the ideal and actual COP, (c) the mass flow rate of ammonia, and (d) the brake work.

4. An ammonia refrigerating cycle operates at 247 kPa suction pressure and 1200 kPa condenser pressure. Other data are the following: Refrigerating capacity 28 kW Compressor clearance Compression efficiency 5% 80% Mechanical efficiency 75% Actual volumetric efficiency 74% Determine (a) the clearance volumetric efficiency, (b) the ideal and actual COP, (c) the mass flow rate of ammonia, and (d) the brake work.

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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Question

4. An ammonia refrigerating cycle operates at 247 kPa suction pressure and 1200 kPa condenser pressure. Other
data are the following:
Refrigerating capacity
Compressor clearance
28 kW
5%
Compression efficiency
Mechanical efficiency
80%
75%
Actual volumetric efficiency
74%
Determine (a) the clearance volumetric efficiency, (b) the ideal and actual COP, (c) the mass flow rate of ammonia,
and (d) the brake work.

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