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5- A refrigeration machine uses Freon R-502, evaporating temperature is -10 °C, condensing temperature is 40 °C, and refrigeration capacity is 38 TR. The refrigerant leaves the evaporator with 8 °C superheating and sub-cooled in condenser with 8 °C lower than saturation temperature. The compressor is reciprocating, single acting, number of cylinders of 4, clearance factor of 5 %, number of revolution of 1150 rpm, mechanical efficiency of 0.80, and cylinder dimensions L/D is 1.27. The compression is adiabatic with h₁ = 0.9. The pressure drop in suction valve is 0.3 bar and delivery valve is 0.5 bar. The condenser is cooled with water and the water temperature raises 8 °C in the condenser. Estimate refrigerant mass flow rate, compressor power, cylinder dimensions, condenser heat load, and the coefficient of performance.

5- A refrigeration machine uses Freon R-502, evaporating temperature is -10 °C, condensing temperature is 40 °C, and refrigeration capacity is 38 TR. The refrigerant leaves the evaporator with 8 °C superheating and sub-cooled in condenser with 8 °C lower than saturation temperature. The compressor is reciprocating, single acting, number of cylinders of 4, clearance factor of 5 %, number of revolution of 1150 rpm, mechanical efficiency of 0.80, and cylinder dimensions L/D is 1.27. The compression is adiabatic with h₁ = 0.9. The pressure drop in suction valve is 0.3 bar and delivery valve is 0.5 bar. The condenser is cooled with water and the water temperature raises 8 °C in the condenser. Estimate refrigerant mass flow rate, compressor power, cylinder dimensions, condenser heat load, and the coefficient of performance.

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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5- A refrigeration machine uses Freon R-502, evaporating temperature is -10 °C, condensing temperature is 40 °C, and refrigeration capacity is 38 TR. The refrigerant leaves the evaporator with 8 °C superheating and sub-cooled in condenser with 8 °C lower than saturation temperature. The compressor is reciprocating, single acting, number of cylinders of 4, clearance factor of 5 %, number of revolution of 1150 rpm, mechanical efficiency of 0.80, and cylinder dimensions L/D is 1.27. The compression is adiabatic with h₁ = 0.9. The pressure drop in suction valve is 0.3 bar and delivery valve is 0.5 bar. The condenser is cooled with water and the water temperature raises 8 °C in the condenser. Estimate refrigerant mass flow rate, compressor power, cylinder dimensions, condenser heat load, and the coefficient of performance.
Transcribed Image Text:5- A refrigeration machine uses Freon R-502, evaporating temperature is -10 °C, condensing temperature is 40 °C, and refrigeration capacity is 38 TR. The refrigerant leaves the evaporator with 8 °C superheating and sub-cooled in condenser with 8 °C lower than saturation temperature. The compressor is reciprocating, single acting, number of cylinders of 4, clearance factor of 5 %, number of revolution of 1150 rpm, mechanical efficiency of 0.80, and cylinder dimensions L/D is 1.27. The compression is adiabatic with h₁ = 0.9. The pressure drop in suction valve is 0.3 bar and delivery valve is 0.5 bar. The condenser is cooled with water and the water temperature raises 8 °C in the condenser. Estimate refrigerant mass flow rate, compressor power, cylinder dimensions, condenser heat load, and the coefficient of performance.
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