化工学报2012，Vol.63Issue(3)：721-727,7.DOI:10.3969/j.issn.0438-1157.2012.03.007
三分螺旋折流板换热器水-水传热壳侧综合性能
Water to water heat transfer on shell-side of trisection helical baffle heat exchangers
摘要
Abstract
Experimental study was conducted in trisection helical baffle heat exchangers with three sector baffle schemes of tilt angles 10°, 15° and 20°, an ellipse baffle scheme of tilt angle 15°, and an axial overlap sector baffle scheme of tilt angle 20°, in contrast to a segmental baffle heat exchanger. Each helix heat exchanger has 48 tubes with layout of one third division of shell cylinder for each baffle, while the segmental baffle heat exchanger has 49 tubes. The data of the shell side, Nusselt number Nuo , axial Euler number Euz,o, and comprehensive performance indicator Nuo/Euz,o are presented versus the shell side axial Reynolds number Rex,o. The results show that the heat exchanger with the scheme of periphery connected sector baffles with tilt angle of 20° has the best performance, whose average comprehensive performance indicator Nuo/Euz,o is 69. 8% higher than that of segmental baffle heat exchanger, while the comprehensive performance indicator of the scheme with tilt angle 10° is lower than that of segmental baffle scheme. With the same tilt angle, the performance with the periphery connected connection baffle scheme is better than that with the axial overlap baffle scheme, and the performance with the sector baffle scheme is better than that with the ellipse baffle scheme.关键词
螺旋折流板换热器/三分螺旋折流板/倾斜角/综合性能Key words
helical baffle heat exchanger/trisection helical baffles/tilt angle/comprehensive performance indieator分类
能源科技引用本文复制引用
董聪,陈亚平,吴嘉峰,操瑞兵,盛艳军,倪明龙..三分螺旋折流板换热器水-水传热壳侧综合性能[J].化工学报,2012,63(3):721-727,7.基金项目
国家自然科学基金项目(50976022) （50976022）
"十一五"国家科技支撵计划重点项目(2008BAJ12B02). （2008BAJ12B02）
