Wang Zenghui，Liu Ruilan，Jia Dounan，Su Guanghui，Qiu Suizheng
(School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract：Heat transfer of supper gas from distilled water at high temperature in narrow annular gap with width of 1.0, 1.5 and 2.0 mm has been experimentally investigated. The results indicated that characteristics of heat transfer in narrow channel are significantly different from that in the common tube. It was found that the smaller the gap width, the bigger the heat transfer coefficient. Using multivariate linear analysis, a heat transfer equation from the experiment results was suggested for engineering application.
Keywords：annular gap;super gas;multivariate linear analysis