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

Résumé et principaux résultats

Présentation au 25th IIR International Congress of Refrigeration, Montréal, août 2019.
The progressive phase-out of HFCs and their replacement by the 4th generation of refrigerants require identifying the performance of these alternative refrigerants in heat exchangers. The objective of this study was to assess the heat transfer performance during evaporation and condensation of R410A, R454B and R32 in a finned tube heat exchanger. A 30 kW experimental setup was built to assess the heat exchanger performance with these three refrigerants. For each refrigerant, 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 was found 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 for comparison of the performance of a same heat exchanger design with the 3 refrigerants. The simulations show that the same design of finned tube heat exchanger can be used for R410A and R454B but a design optimization will be necessary with R32.

Thème

Echangeurs de chaleur

Mots-clés

Echangeurs, Fluides frigorigènes

Auteurs

GAILLARD Nicolas, MONDOT Michèle, PARDO Pierre