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 75°F, 14.7 lb/in² with a volumetric flow rate of 1250 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.

Elements Of Electromagnetics
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13 thermodynamics
Determine the compressor power, in horsepower.
W cv
=
i
hp
Transcribed Image Text:Determine the compressor power, in horsepower. W cv = i hp
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 75°F, 14.7 lb/in2 with a
volumetric flow rate of 1250 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
1+ R22 at
www
T₂=160°F
P2-200 lbfin
Condenser
Air at 7 P4-14.71bfin ²
(AV)
73-90°F
P=200 lbf/in²
T
T₂
= 60°F
T₁
=90°F
Ti
= 40°F
T₁ = 40°F
Pi-80 lbf/in2
Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
P2= pa= 200 lb/in
\P₁ = 80 Ibrin²
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 75°F, 14.7 lb/in2 with a volumetric flow rate of 1250 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 1+ R22 at www T₂=160°F P2-200 lbfin Condenser Air at 7 P4-14.71bfin ² (AV) 73-90°F P=200 lbf/in² T T₂ = 60°F T₁ =90°F Ti = 40°F T₁ = 40°F Pi-80 lbf/in2 Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. P2= pa= 200 lb/in \P₁ = 80 Ibrin²
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