The figure belows shows three components of an air-conditioning system, where T3 = 95°F and m3 = 4.5 lb/s. Refrigerant 134a flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-state operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic and potential energy effects are negligible. Saturated liquid R-134a T3, m3 Air T₁ = 535°R Cp = 0.240 Btu/lb-°R

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Question 35

The figure belows shows three components of an air-conditioning system, where T3 = 95°F and m3 = 4.5 lb/s. Refrigerant 134a
flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-state
operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic
and potential energy effects are negligible.
m₁ =
Saturated liquid R-134a
T3, mz
i
Throttling
valve
lb/s
4
P4= 60 lbf/in.²
Air
T₁ = 535°R
Cp = 0.240 Btu/lb-ºR
Fan
wwwwww
T₂=528°R 2
5
Vcv = -0.2 hp
Modeling air as an ideal gas with constant cp = 0.240 Btu/lb. "R, determine the mass flow rate of the air, in lb/s.
Saturated vapor
P5=P4
-Heat exchanger
Transcribed Image Text:The figure belows shows three components of an air-conditioning system, where T3 = 95°F and m3 = 4.5 lb/s. Refrigerant 134a flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-state operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic and potential energy effects are negligible. m₁ = Saturated liquid R-134a T3, mz i Throttling valve lb/s 4 P4= 60 lbf/in.² Air T₁ = 535°R Cp = 0.240 Btu/lb-ºR Fan wwwwww T₂=528°R 2 5 Vcv = -0.2 hp Modeling air as an ideal gas with constant cp = 0.240 Btu/lb. "R, determine the mass flow rate of the air, in lb/s. Saturated vapor P5=P4 -Heat exchanger
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