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 lbf/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 lbf/in², 90°F. Air enters the condenser at 75°F, 14.7 lbf/in² with a volumetric flow rate of 750 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. I₁=110°F Compressor 1+ R22 at mim www 7₂-160°F P₂-200 lbfin2 T₁ = 40°F Pi-80 lbf/in2 Condenser Air at T₁ P4-14.71bfin.² (AV) 7₁-90°F P-200 lbf/in² T₂ <<- 60°F T₁ = 90°F T₁ = 40°F Papa = 200 bin AE P-80 lbrin Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.

Elements Of Electromagnetics
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4.13

As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lbf/in²
and is compressed to 160°F, 200 lbf/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 lbf/in², 90°F. Air enters the condenser at 75°F, 14.7 lbf/in2² with a
volumetric flow rate of 750 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.
I, 110°F
Compressor
T₂=160°F
P₂-200 lbfin ²
R22 at
I₁ = 40°F
P₁-80 lbf/in.²
Condenser
www
mm ³
Air at T₁ P4-14.71bf'in ²
(AV)₁
73-90°F
P3=200 lbf/in ²
T
Papa = 200 lb/in²
N
Ibrin²
Pi=1
T₂
= 60°F
T₁
= 90°F
T
= 40°F
Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
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 lbf/in² and is compressed to 160°F, 200 lbf/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 lbf/in², 90°F. Air enters the condenser at 75°F, 14.7 lbf/in2² with a volumetric flow rate of 750 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. I, 110°F Compressor T₂=160°F P₂-200 lbfin ² R22 at I₁ = 40°F P₁-80 lbf/in.² Condenser www mm ³ Air at T₁ P4-14.71bf'in ² (AV)₁ 73-90°F P3=200 lbf/in ² T Papa = 200 lb/in² N Ibrin² Pi=1 T₂ = 60°F T₁ = 90°F T = 40°F Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
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