Abstract
The concentration dependence of pool nucleate boiling heat transfer coefficients for HFC-134a and Alkylbenzene oil systems has experimentally been investigated. A horizontal Pt wire(φ 0.1 mm) is used. Heat transfer coefficients for HFC-134a/ Alkylbenzene oil systems have been obtained at temperatures of 282.15, 292.15 and 302.15 K for oil concentrations from 0 to 8 mass%. The range of heat flux is between 0.02 and 300 kW・m^<-2>. The present results show that the heat transfer coefficient decreases by about 50% at the oil concentration of 0.5 mass%. At the oil concentrations higher than 2 mass%, the heat transfer coefficients keep constant in spite ofthe increase in oil concentration.
