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 30 degrees C atmospheric air from the outside down to 10 degrees 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? What is the mass flow rate of air at 10 degrees C?
This solution calculates the mass flow rate and low temperature heat transfer rate by using linear interpolation, heat flux value in the evaporator and the enthalpy change of air. All steps are shown with explanations.