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《Guangdong Electric Power》 2004-05
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Experimental investigation on convective heat transfer and flowing friction in RISG tubes

LONG Xin-fengion,Ministry of Education,School of Chemical Engineering and Energy,South China Univ. of Technology,Guangzhou 510640,China)  
Aiming at the need of non-copper in boiler feedwater system in power plants, a new type of steel two-side heat transfer enhancement tube, namely ratchet tube with internal spiral grooves (RISG tube), was designed and manufactured. By use of a general steam condensation testing equipment only for horizontal single tube, a set of experimental tests are conducted on 5 RISG tubes with different structural parameters to investigate the characteristics of heat transfer and flowing friction. Based on a lot of experimental data, the correlations of internal heat transfer coefficient and friction factor are obtained in the range of experimental Reynolds number. Furthermore, performance evaluation criteria are used to obtain quantitative estimates of the benefits offered by RISG tubes with water flowing in them. As the experimental results indicated, compared with smooth tubes, the internal heat transfer coefficient of all RISG tubes is improved by 42% to 152%, and the flow resistance coefficient increased by 48% to 350%. The integrate capability of RISG tubes in heat transfer and flowing friction is better than that of smooth tubes under any condition. As a result, RISG tubes can be used in heat exchanging equipments of power plants to considerably enhance the utilization of thermal energy.
【Fund】: 广东省科技计划资助项目(2KM00905G)
【CateGory Index】: TK124
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【Citations】
Chinese Journal Full-text Database 4 Hits
1 JIANG Hai 1,ZENG Dong ping 1,DENG Dong hai 2,LIANG Ping 2, LONG Xin feng 3,ZHUANG Li xian 3, CHEN Guang huai 3 (1.Guangdong Electric Power Holding Co., Guangzhou 510600, China; 2. Guangdong Electric Power Industrial School, Guangzhou 510520;Heat transfer investigation and application of steel spirally fluted tubes[J];GUANGDONG ELECTRIC POWER;2000-03
2 LIANG Ping1, LONG Xin-feng2, LOU Bo1, CHEN Guang-hui2, ZHUANG Li-xian2 (1. School of Guangdong Electric Power Engineering, Guangzhou 510520, China; 2. South China University of Technology, Guangzhou 510604, China);Investigation on heat transfer enhancement for the erect water- feed preheater and non-copper running in power station[J];Journal of University of Shanghai For Science and Technology;2001-03
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【Co-citations】
Chinese Journal Full-text Database 8 Hits
1 SU Mao-e, LONG Xin-feng, LIANG Ping (Guangdong Power Industry School, Guangzhou 510520, China; South China University of Technology, Guangzhou 510640, China);Investigation into Heat Transfer and Flow Friction of RISG and Its Application[J];Electric Power Science and Engineering;2005-03
2 LONG Xin-feng(Chemical & Enegy Institute, South China University of Science and Technology, Gugangzhou, Guangdong, 510640, China);An Experiment upon the Properties of Convective Heat Exchange and Flow Resistance within the External Ratched Tubes of Inside Spin[J];Power Station Auxiliary Equipment;2005-01
3 WANG Yu,WANG Tao(Shenyang Huibo Heat Energy Equipment Co.,Ltd.,Shenyang 110043,China);General Studies of the Comprehensive Performance of Four Common Types of Intensified Heat Exchange Tubes[J];Pipeline Technique and Equipment;2006-05
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7 ZENG Li-jun1,LONG Xin-feng2,LIANG Ping3(1.Guangdong Yuehua Power Generation Ltd.Co.,Guangzhou 510731,China;2.School of Chemical Engineering and Energy ofSouth China University of Technology,Guangzhou 510640,China;3.School of Electricity Power of South China University ofTechnology,Guangzhou 510640,China);Analysis of the condenser ammonia corrosion and its non-copper modification[J];Water Conservancy & Electric Power Machinery;2006-09
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