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 lb//in², 90°F. Air enters the condenser at 80°F, 14.7 lbf/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. Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. Condenser Ts= 110°F 2+ Compressor www www T₂= 160°F P2= 200 lbf/in.² R22 at T₁ = 40°F P₁ = 80 lbf/in.2 Air at T4 = 80°F, P4 = 14.7 lbf/in.² (AV)4 3 T3 = 90°F P3= 200 lbf/in.²

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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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 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. Determine the mass
flow rate of refrigerant, in lb/min, and the
compressor power, in horsepower.
Condenser
Ts= 110°F
2+
Compressor
www
www
T₂= 160°F
P2= 200 lbffin.²
R22 at
T₁ = 40°F
P₁ = 80 lbf/in.2
Air at T4 = 80°F, P4 = 14.7 lbf/in.²
(AV)4
3
T3 = 90°F
P3= 200 lbf/in.²
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 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. Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. Condenser Ts= 110°F 2+ Compressor www www T₂= 160°F P2= 200 lbffin.² R22 at T₁ = 40°F P₁ = 80 lbf/in.2 Air at T4 = 80°F, P4 = 14.7 lbf/in.² (AV)4 3 T3 = 90°F P3= 200 lbf/in.²
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