11. Use ASHRAE Table and Ph diagram 2019 heat exchanger that would superheat the suction vapor to 25°C.Compare the coefficient of performance of these two cycles. Whatis the temperature of the refrigerant entering the expansion valvewith the heat exchanger? For a load of 50kW, determine thevolume flow rate for both cycles.Ans. 2.79, 2.80, 12°C, 0.0522m³/s, 0.0523 m³/s (11) In a conventional refrigeration cycle which uses Freon-12 as the refrigerant, the temperature of the evaporating fluidis -20°C. It leaves the evaporator as saturated vapor at -20°Cand enters the compressor. The pressure in the condenser is 1.30MPa. The liquid leaves the condenser and enters the expansionvalve at 40°C. It is proposed to modify this cycle by adding a

Given:Refrigerant=R12Evaporating temperature, Te=-20oCCondenser pressure, Pc=1.30 MPaTemperature of…

(11) In a conventional refrigeration cycle which uses Freon- 12 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

(11) In a conventional refrigeration cycle which uses Freon- 12 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

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter3: Refrigeration And Refrigerants

Section: Chapter Questions

Problem 12RQ: The condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how...

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Question

11. Use ASHRAE Table and Ph diagram 2019

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
volume flow rate for both cycles.
Ans. 2.79, 2.80, 12°C, 0.0522m³/s, 0.0523 m³/s

(11) In a conventional refrigeration cycle which uses Freon-
12 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

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