Abstract
An experiment was conducted to determine the impact of selecting different materials for evaporator operating with enhanced surfaces based on characteristics of refrigerant R134a considering flow boiling heat transfer. The Experiment settings included fixed saturation temperature of 10 °C, mass flux varied from 100 to 300 kg/m2s and heat flux varied from 20 to 60 kW/m2. In the current study, a number of different experiments on flow boiling with R134a are compared with one another in terms of their heat transfer coefficients using tubes made of stainless steel, aluminum, brass, and copper respectively. And the findings demonstrated that, among the tubes that were chosen, the copper tube featuring a broad range of vapor quality that could reach 0.8 had the highest heat transfer coefficient.
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