Heat transfer coefficient of near boiling single phase flow with propane in horizontal circular micro channel

Experimental study of heat transfer coefficient of single phase has conducted successfully. Technology to reduce energy consumption is important to be investigated, moreover with implementation of renewable energy. The study used natural refrigerant of propane as working fluid with heating process. The aim of the present research is to study near boiling single phase heat transfer coefficient on the micro channel of 500 mu m diameter and 0.5 meter length. Variable of research are heat flux of 1 to 15 kW/m(2), mass flux of 297 to 1102 kg/m(2).s, and test section inlet temperature of 21 to 26 degrees C. The experimental results showed single phase laminar-turbulence flow with Reynolds number less than 10000. Heat transfer coefficient of near boiling single phase flow is significantly affected by Reynolds number and Prantl number. Using the present experimental data, new correlation of Nusselt number is developed as a function of Reynolds number and Prantl number.