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An ammonia refrigerator produces 20 tonnes of ice per day at 0°C. The condensation and .2 evaporation take place at 20°C and -20°C respectively. The temperature of vapour at the end :of isentropic compression is 50°C. The actual COP is 70% of the theoretical COP. Determine .i) the rate of NH, circulation) ii) the size of single acting-compressor when running at 240 rpm, assuming L=D and) [volumetric efficiency of 80%. [where: L is the stroke and D is the piston diameter .Take h (fusion of ice) = 335 kJ/kg

An ammonia refrigerator produces 20 tonnes of ice per day at 0°C. The condensation and .2 evaporation take place at 20°C and -20°C respectively. The temperature of vapour at the end :of isentropic compression is 50°C. The actual COP is 70% of the theoretical COP. Determine .i) the rate of NH, circulation) ii) the size of single acting-compressor when running at 240 rpm, assuming L=D and) [volumetric efficiency of 80%. [where: L is the stroke and D is the piston diameter .Take h (fusion of ice) = 335 kJ/kg

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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An ammonia refrigerator produces 20 tonnes of ice per day at 0°C. The condensation and .2 evaporation take place at 20°C and -20°C respectively. The temperature of vapour at the end :of isentropic compression is 50°C. The actual COP is 70% of the theoretical COP. Determine .i) the rate of NH, circulation) ii) the size of single acting-compressor when running at 240 rpm, assuming L=D and) [volumetric efficiency of 80%. [where: Lis the stroke and D is the piston diameter .Take he (fusion of ice) = 335 kJ/kg
Transcribed Image Text:An ammonia refrigerator produces 20 tonnes of ice per day at 0°C. The condensation and .2 evaporation take place at 20°C and -20°C respectively. The temperature of vapour at the end :of isentropic compression is 50°C. The actual COP is 70% of the theoretical COP. Determine .i) the rate of NH, circulation) ii) the size of single acting-compressor when running at 240 rpm, assuming L=D and) [volumetric efficiency of 80%. [where: Lis the stroke and D is the piston diameter .Take he (fusion of ice) = 335 kJ/kg
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