An air-conditioning system is shown in the figure below in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of (AV)₁ = 150 m³/min at 32°C, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Air P₁ = 1 bar T₁ = 32°C = 305 K (AV)1 3 Refrigerant 134a R-134a P3 = 5 bar x3=0.20 Air 2-P2=0.95 bar T₂ 22°C 295 K R-134a P4 = 5 bar T₁ = 20°C Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state: (a) the mass flow rate of the refrigerant, in kg/min. (b) the rate of heat transfer, in kJ/min, to the air from the refrigerant.
An air-conditioning system is shown in the figure below in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of (AV)₁ = 150 m³/min at 32°C, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Air P₁ = 1 bar T₁ = 32°C = 305 K (AV)1 3 Refrigerant 134a R-134a P3 = 5 bar x3=0.20 Air 2-P2=0.95 bar T₂ 22°C 295 K R-134a P4 = 5 bar T₁ = 20°C Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state: (a) the mass flow rate of the refrigerant, in kg/min. (b) the rate of heat transfer, in kJ/min, to the air from the refrigerant.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:An air-conditioning system is shown in the figure below in which air flows over tubes carrying Refrigerant 134a. Air enters with a
volumetric flow rate of (AV)₁ = 150 m³/min at 32°C, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a
quality of 20% and exits at 5 bar, 20°C.
Air
P₁ = 1 bar
T₁ = 32°C = 305 K
(AV)1
3
Refrigerant 134a
R-134a
P3 = 5 bar
x3=0.20
Air
2-P2=0.95 bar
T₂ 22°C 295 K
R-134a
P4 = 5 bar
T₁ = 20°C
Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at
steady state:
(a) the mass flow rate of the refrigerant, in kg/min.
(b) the rate of heat transfer, in kJ/min, to the air from the refrigerant.
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