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DEVELOPMENT OF HEAT TRANSFER COEFFICIENT CORRELATION FOR MINICHANNEL CONDENSER
Keywords:
alternative refrigerants, R152a, R134a, heat transfer coefficient.DOI:
https://doi.org/10.17654/0973576323021Abstract
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 minichannel condenser. Heater bank was provided for controlling condensation and evaporator temperature along with sub-cooling and superheating temperature by using PID controllers. All the refrigerants are tested for condensation temperature ranging from 40°C to 55°C while evaporation temperature ranges from –15°C to 15°C. Refrigerant charge was reduced 50% with the minichannel condenser over the conventional condenser. Two phase condensation heat transfer coefficient correlation was developed from the experimental data points within ±15% with existing correlations.
Received: February 9, 2023;
Accepted: March 30, 2023;
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