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《Electric Power Science and Engineering》 2005-03
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Investigation into Heat Transfer and Flow Friction of RISG and Its Application

SU Mao-e, LONG Xin-feng, LIANG Ping (Guangdong Power Industry School, Guangzhou 510520, China; South China University of Technology, Guangzhou 510640, China)  
A new type of integer steel two-side heat transfer enhancement tube, ratchet tube with internal spiral groove (RISG tube) is designed and manufactured. A set of experimental tests are conducted to investigate the characteristics of heat transfer and hydrodynamics. The experimental results indicate that compared with smooth tube, the internal heat transfer coefficient of all RISG tubes are improved by 56 % to 189 % , and the flow resistance coefficient increased by 37% to 330 %. The field testing results show that the internal heat transfer coefficient of RISG is improved by 21 % to 45% comparing with copper smooth tube.
【Fund】: 广东省科技计划项目资助(2KM00905G)
【CateGory Index】: TK124;
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