Experimental Study of Heat Transfer Rate During Evaporation of Ozone Safe Freon R134a on Plane and Finned Tubes

Abstract

Experimental definition of heat transfer rate during developed nucleate boiling of freon -134a on plane and longitudinally finned tubes in the conditions of pool boiling in the range of heat fluxes of 8-63 kW/m2 at saturation pressures of ps = 0.5-0.8 MPa has been provided. The criterion equations are obtained enabling to calculate the heat transfer rate on horizontal plane technically rough tubes for the conditions of experiments.