The air conditioner in a car uses R-134a and the compressor power input is 1.5 kW bringing the R-134a from 201.7 kPa to 1200 kPa by compression. The cold space is a heat exchanger that cools atmospheric air from the outside 30°C down to 10°C and blows it into the car. What is the mass flow rate of the R-134a and what is the low temperature heat transfer rate. How much is the mass flow rate of air at 10°C? Standard Refrigeration Cycle Table B.5: h₁ = 392.28 kJ/kg; s₁=1.7319 kJ/kg K, ha-hy=266 kJ/kg

Elements Of Electromagnetics
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Borgnakke and Sonntag
11.89
The air conditioner in a car uses R-134a and the compressor power input is 15 kW
bringing the R-134a from 201.7 kPa to 1200 kPa by compression. The cold space is
a heat exchanger that cools atmospheric air from the outside 30°C down to 10°C
and blows it into the car. What is the mass flow rate of the R-134a and what is the
low temperature heat transfer rate. How much is the mass flow rate of air at 10°C?
Standard Refrigeration Cycle
Table B.5: h, = 392.28 kJ/kg; s = 1.7319 kJ/kg K, h h, 266 kJ/kg
C.V. Compressor (assume ideal)
Transcribed Image Text:Borgnakke and Sonntag 11.89 The air conditioner in a car uses R-134a and the compressor power input is 15 kW bringing the R-134a from 201.7 kPa to 1200 kPa by compression. The cold space is a heat exchanger that cools atmospheric air from the outside 30°C down to 10°C and blows it into the car. What is the mass flow rate of the R-134a and what is the low temperature heat transfer rate. How much is the mass flow rate of air at 10°C? Standard Refrigeration Cycle Table B.5: h, = 392.28 kJ/kg; s = 1.7319 kJ/kg K, h h, 266 kJ/kg C.V. Compressor (assume ideal)
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