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 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.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
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 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 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.
Step 1
I₁=110°F
Compressor
1 R22 at
MR22
www
www
1₂-160 F
P=200 lbfin²
T₁-40°F
P-80 lbfin²
Condenser
4
Air at 7 P4-14.71lbfin¹
(AV),
3
7₁-90°F
P-200 lbf/in 2
Determine the mass flow rate of refrigerant, in lb/min.
Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower.
lb/min
T:
<- 60°F
T₁
-90°F
T₁
= 40°F
A
p=80 Thein
P2 = P = 200 lb/in²
V
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 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. Step 1 I₁=110°F Compressor 1 R22 at MR22 www www 1₂-160 F P=200 lbfin² T₁-40°F P-80 lbfin² Condenser 4 Air at 7 P4-14.71lbfin¹ (AV), 3 7₁-90°F P-200 lbf/in 2 Determine the mass flow rate of refrigerant, in lb/min. Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. lb/min T: <- 60°F T₁ -90°F T₁ = 40°F A p=80 Thein P2 = P = 200 lb/in² V
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