In a conventional refrigeration cycle which uses Freon12 as the refrigerant, the temperature of the evaporating fluid is -20°C. It leaves the evaporator as saturated vapor at -20°C and enters the compressor. The pressure in the condenser is 1.30 MPa. The liquid leaves the condenser and enters the expansion valve at 40"C. It is proposed to modify this cycle by adding a heat exchanger that would superheat the suction vapor to 25°C. Compare the coefficient of performance of these two cycles. What is the temperature of the refrigerant entering the expansion valve with the heat exchanger? For a load of 50kW, determine the vol ume flow rate for both cycles.
In a conventional refrigeration cycle which uses Freon12 as the refrigerant, the temperature of the evaporating fluid is -20°C. It leaves the evaporator as saturated vapor at -20°C and enters the compressor. The pressure in the condenser is 1.30 MPa. The liquid leaves the condenser and enters the expansion valve at 40"C. It is proposed to modify this cycle by adding a heat exchanger that would superheat the suction vapor to 25°C. Compare the coefficient of performance of these two cycles. What is the temperature of the refrigerant entering the expansion valve with the heat exchanger? For a load of 50kW, determine the vol ume flow rate for both cycles.
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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Use ashrae for refregerant
In a conventional refrigeration cycle which uses Freon12 as the refrigerant, the temperature of the evaporating fluid
is -20°C. It leaves the evaporator as saturated vapor at -20°C
and enters the compressor. The pressure in the condenser is 1.30
MPa. The liquid leaves the condenser and enters the expansion
valve at 40"C. It is proposed to modify this cycle by adding a heat exchanger that would superheat the suction vapor to 25°C.
Compare the coefficient of performance of these two cycles. What
is the temperature of the refrigerant entering the expansion valve
with the heat exchanger? For a load of 50kW, determine the
vol ume flow rate for both cycles.
Ans. 2.79, 2.80, 12°C, 0.0522m3/s, 0.0523 m3/s
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