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 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 lbf/in² with a volumetric flow rate of 1000 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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Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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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/in² with a
volumetric flow rate of 1000 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
7₂=160°F
P₂-200 lbfin2
T₁=40°F
P1-80 lbf/in 2
-Condenser
мишин
-www
Air at T₁ P4-14.7 lbfin.²
(AV)4
73-90°F
P=200 lbf/in ²
T₂
<= 60°F
T₁
= 90°F
T₁
= 40°F
-
A
Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
P2 P3200 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 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/in² with a volumetric flow rate of 1000 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 7₂=160°F P₂-200 lbfin2 T₁=40°F P1-80 lbf/in 2 -Condenser мишин -www Air at T₁ P4-14.7 lbfin.² (AV)4 73-90°F P=200 lbf/in ² T₂ <= 60°F T₁ = 90°F T₁ = 40°F - A Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. P2 P3200 lb/in² pi = 80 lbrin²
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