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T, = 30 °C P₁ = 9 bar www. Condenser expansion Compressor valve Evaporator www. P₂= 9 bar ne W. 6 T₁-35 °C P₁ = 0.6 bar Refrigerant 134a is the working fluid in a refrigeration cycle shown in the figure. The 134a enters the compressor at -35 °C, 0.6 bar an leaves the condenser at 9 bar, 30 °C. The compressor has an isentropic efficiency of 80% The mass flow rate of the refrigerant is 0.08 kg/s. The temperature at the outer surface of the condenser is 300 K. Air enters the evaporator at 270 K, 1 atm and leaves the evaporator at 240 K, 1 atm. The expansion valve is a throttling valve. Ignore the stray heat from the compressor, determine (a) the compressor power, in kW, (b) the coefficient of performance, and (c) the rate of entropy production per cycle.

T, = 30 °C P₁ = 9 bar www. Condenser expansion Compressor valve Evaporator www. P₂= 9 bar ne W. 6 T₁-35 °C P₁ = 0.6 bar Refrigerant 134a is the working fluid in a refrigeration cycle shown in the figure. The 134a enters the compressor at -35 °C, 0.6 bar an leaves the condenser at 9 bar, 30 °C. The compressor has an isentropic efficiency of 80% The mass flow rate of the refrigerant is 0.08 kg/s. The temperature at the outer surface of the condenser is 300 K. Air enters the evaporator at 270 K, 1 atm and leaves the evaporator at 240 K, 1 atm. The expansion valve is a throttling valve. Ignore the stray heat from the compressor, determine (a) the compressor power, in kW, (b) the coefficient of performance, and (c) the rate of entropy production per cycle.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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T₁ = 30 °C Pi=9 bar 3 www. Condenser expansion Compressor valve Evaporator www. P₂=9 bar ne W -6 T₁-35 °C P₁ = 0.6 bar Refrigerant 134a is the working fluid in a refrigeration cycle shown in the figure. The 134a enters the compressor at -35 °C, 0.6 bar leaves the condenser at 9 bar, 30 °C. The compressor has an isentropic efficiency of 80% The mass flow rate of the refrigerant is 0.08 kg/s. The temperature at the outer surface of the condenser is 300 K. Air enters the evaporator at 270 K, 1 atm and leaves the evaporator at 240 K, 1 atm. The expansion ai valve is a throttling valve. Ignore the stray heat from the compressor, determine (a) the compressor power, in kW, (b) the coefficient of performance, and (c) the rate of entropy production per cycle.
Transcribed Image Text:T₁ = 30 °C Pi=9 bar 3 www. Condenser expansion Compressor valve Evaporator www. P₂=9 bar ne W -6 T₁-35 °C P₁ = 0.6 bar Refrigerant 134a is the working fluid in a refrigeration cycle shown in the figure. The 134a enters the compressor at -35 °C, 0.6 bar leaves the condenser at 9 bar, 30 °C. The compressor has an isentropic efficiency of 80% The mass flow rate of the refrigerant is 0.08 kg/s. The temperature at the outer surface of the condenser is 300 K. Air enters the evaporator at 270 K, 1 atm and leaves the evaporator at 240 K, 1 atm. The expansion ai valve is a throttling valve. Ignore the stray heat from the compressor, determine (a) the compressor power, in kW, (b) the coefficient of performance, and (c) the rate of entropy production per cycle.
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