Experimental Investigation of Boiling Heat Transfer Coefficient of MC22 on Horizontal Copper Rod

In recent years, refrigerant MC 22 as a kind of natural refrigerant which is environmentally-friendly has been considered to used in refrigeration and air conditioning applied. The research aim to ascertain boiling heat transfer coefficient of refrigerant MC22 on horizontal copper rod. This work has been done experimentally by especially designed for this investigation. A copper rod with 12 mm diameters and 70 cm long was used as a testing object in boiling heat transfer test apparatus. Method was used by heating the copper rod at from 2 to 10 watts with 2 watts increases; each increases was made after a 2 minutes time interval. It was concluded that the enhanced of heat flux caused the increasing of boiling heat transfer coefficient of refrigerant MC 22.