As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb-/in² and is compressed to 160°F, 200 lb/in². The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 80°F, 14.7 lb-/in² with a volumetric flow rate of 1500 ft3/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. 5 I₁=110°F Compressor 1- R22 at www ww T₂=160°F P₂-200 lbfin ² -Condenser Air at T₁ P4-14.7 lbfin.² (AV)₂ 73-90°F P-200 lbf/in² T₂ All = 60°F T₂ = 90°F T₁ = 40°F T₁=40°F P1-80 lbf/in.² Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. P2 = Pa = 200 lb/in² Pi = 80 lbrin²

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Question 40

 

As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb-/in²
and is compressed to 160°F, 200 lb/in². The refrigerant exiting the compressor enters a condenser where energy transfer to air as a
separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 80°F, 14.7 lb-/in² with a
volumetric flow rate of 1500 ft3/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and
assume ideal gas behavior for the air.
5
I₂ = 110°F
Compressor
1+ R22 at
www
www
T₂=160°F
P₂= 200 lbfin ²
Condenser
3
Air at T₁ P4-14.71bfin.²
(AV),
73-90°F
P3= 200 lbf/in.²
H
T₂
= 60°F
T₁
= 90°F
T₁
= 40°F
I₁ = 40°F
P1-80 lbf/in.²
Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
P2 = P3 = 200 lb/in²
Pi = 80 lbrin²
Transcribed Image Text:As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb-/in² and is compressed to 160°F, 200 lb/in². The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 80°F, 14.7 lb-/in² with a volumetric flow rate of 1500 ft3/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. 5 I₂ = 110°F Compressor 1+ R22 at www www T₂=160°F P₂= 200 lbfin ² Condenser 3 Air at T₁ P4-14.71bfin.² (AV), 73-90°F P3= 200 lbf/in.² H T₂ = 60°F T₁ = 90°F T₁ = 40°F I₁ = 40°F P1-80 lbf/in.² Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. P2 = P3 = 200 lb/in² Pi = 80 lbrin²
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