Two Phase Heat Transfer Coefficient for Automobile Condenser
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Abstract
Vapour compression refrigeration (VCR) system was designed, developed and fabricated for testing alternative refrigerants such as R152a, R600a, R290 and mixture of R290/R600a (50/50% by mass) over presently used R134a with aluminium mini channel condenser over conventional round tube plate fin condenser. The heater bank was provided for controlling condensation and evaporator temperature along with sub-cooling and superheating temperature by using PID controllers. All the refrigerants were tested for condensation temperature ranging from 40C to 55C while evaporation temperature ranges from -15degC to 15degC. The refrigerant charge was reduced drastically with the mini channel condenser over the conventional condenser by 50% due to low internal volume of condenser. The heat transfer coefficient correlation was developed from the experimental data points and validated with the standard correlations.
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