9. An ammonia vapour-compression refrigerator has a single-stage, single-acting reciprocating compressor which has a bore of 127 mm, a stroke of 152 mm and a speed of 240 r.p.m. The pressure in the evaporator is 1.588 bar and that in the condenser is 13.89 bar. The volumetric efficiency of the compressor is 80% and its mechanical efficiency is 90%. The vapour is dry saturated on leaving the evaporator and the liquid leaves the condenser at 32°C. Calculate the mass flow of refrigerant, the refrigerating effect, and the power ideally required to drive the compressor. [Ans. 0.502 kg/min ; 9.04 kW; 2.73 kW]
9. An ammonia vapour-compression refrigerator has a single-stage, single-acting reciprocating compressor which has a bore of 127 mm, a stroke of 152 mm and a speed of 240 r.p.m. The pressure in the evaporator is 1.588 bar and that in the condenser is 13.89 bar. The volumetric efficiency of the compressor is 80% and its mechanical efficiency is 90%. The vapour is dry saturated on leaving the evaporator and the liquid leaves the condenser at 32°C. Calculate the mass flow of refrigerant, the refrigerating effect, and the power ideally required to drive the compressor. [Ans. 0.502 kg/min ; 9.04 kW; 2.73 kW]
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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![9. An ammonia vapour-compression refrigerator has a single-stage, single-acting reciprocating compressor
which has a bore of 127 mm, a stroke of 152 mm and a speed of 240 r.p.m. The pressure in the evaporator
is 1.588 bar and that in the condenser is 13.89 bar. The volumetric efficiency of the compressor is 80% and
its mechanical efficiency is 90%. The vapour is dry saturated on leaving the evaporator and the liquid leaves
the condenser at 32°C. Calculate the mass flow of refrigerant, the refrigerating effect, and the power
ideally required to drive the compressor.
[Ans. 0.502 kg/min ; 9.04 kW ; 2.73 kW]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffdfdab83-fc69-428b-b946-08a8ad0ea819%2Fb65c603e-9af6-4e0d-bf5d-05f0e4d426e6%2F0dl2iz_processed.jpeg&w=3840&q=75)
Transcribed Image Text:9. An ammonia vapour-compression refrigerator has a single-stage, single-acting reciprocating compressor
which has a bore of 127 mm, a stroke of 152 mm and a speed of 240 r.p.m. The pressure in the evaporator
is 1.588 bar and that in the condenser is 13.89 bar. The volumetric efficiency of the compressor is 80% and
its mechanical efficiency is 90%. The vapour is dry saturated on leaving the evaporator and the liquid leaves
the condenser at 32°C. Calculate the mass flow of refrigerant, the refrigerating effect, and the power
ideally required to drive the compressor.
[Ans. 0.502 kg/min ; 9.04 kW ; 2.73 kW]
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