Experimental and numerical study of heat transfer in evaporation and condensation with R410A, R32 and R454B in a finned tube heat exchanger

摘要

The progressive phase-out of HFCs and their replacement by the 4th generation of refrigerantsrequire identifying the performance of these alternative refrigerants in heat exchangers. Theobjective of this study was to assess the heat transfer performance during evaporation andcondensation of R410A, R454B and R32 in a finned tube heat exchanger. A 30 kW experimentalsetup was built to assess the heat exchanger performance with these three refrigerants. For eachrefrigerant, 6 tests were carried out in evaporation and 5 tests in condensation. During the tests,energy balance between the thermal capacities measured on the air and refrigerant sides wasfound to be less than 5%, which confirmed a good accuracy of measurements. A good agreement(+/-2.5%) between experimental data and simulations allowed using EVAP-COND software forcomparison of the performance of a same heat exchanger design with the 3 refrigerants. Thesimulations show that the same design of finned tube heat exchanger can be used for R410A andR454B but a design optimization will be necessary with R32.