Some comparative experiments between straight tubes and helical tubes have been taken. It indicates that helical tube is a kind of more effective enhanced heat exchanger than straight tube. Besides, more heat exchange area can be disposed in constant space because of the compact framework. 前人已经将直管和螺旋管进行了比较分析,结果表明:螺旋管是一种有效的传热强化管,换热性能优于直管;结构紧凑,在单位空间内可布置更大的换热面积。