Mélanges de frigorigènes comme fluide actif d'un thermosiphon fermé diphasique.

This paper investigates the heat transfer characteristics of a closed two-phase thermosyphon using refrigerant blends as the working fluid. The selected working fluids were HP62 (or R404A which is a near azeotropic blend of HFC-125/HFC-143a/HFC-134a with 44/52/4% by mass) and MP39 (a blend of HCFC-22/HFC-152a/HCFC-124 with 3/13/34% mass). The mathematical model proposed by Shiraishi et al. (1982) was employed to predict the temperature distribution of a thermosiphon. The temperature distribution from the experimental results matched the prediction from the model satisfactorily, as did the overall thermal resistance of the thermosiphon.