Experimental Study on Wall Temperature Distribution of Flat Tube

Research on the distribution of outside wall temperature,horizontally and vertically laid flattube in the casing pipe,is carried out by experimental method. The present study indicates that the outside wall temperature,which is measured by the thermocouple in middle of straight wall surface of flat tube,is lower than the temperature near the arc part,and regular methods can not be adopted to measure the flat tube outside wall temperature,like the circular tube.