Experimental study on heat transfer and resistance performance of corrugated tube

Experimental research of heat transfer and resistance characteristic of three sizes of corrugated tube and straight tube was done. The results show that the shape of the corrugated pipe enhances disturbance of liquid, and strengthens heat exchange ability of corrugated tube. Corrugated tube heat exchange ability increases while the ratio of corrugation pitch and external diameter of corrugated tube decreases. The ratio of heat transfer coefficient and pressure drop of corrugated tube is 1.38-3.36 times more than that of straight tube. The experimental results contribute to some reference value for heat transfer calculation of corrugated tube.