摘要
以水为工质,对弓形折流板光管换热器、螺旋折流板波槽管换热器以及螺旋折流板光管换热器进行了传热实验。结果表明,螺旋折流板波槽管换热器具有良好的换热能力,螺旋角对螺旋折流板换热器壳程换热影响较大。与折流板数量为14个和5个的弓形折流板光管换热器相比,螺旋角为9.8°的螺旋折流板光管换热器的壳程换热系数分别提高了4%~60%和5%~70%;螺旋角均为9.8°的螺旋折流板波槽管换热器与螺旋折流板光管换热器相比,前者的壳程换热系数和管程换热系数分别提高了2%~26%和60%~120%;与螺旋角为9.8°的波槽管换热器相比,螺旋角为6°和8°的波槽管换热器的壳程换热系数分别提高13%~48%和5%~37%。
With water be the working medium,a series of heat transfer experiments have been performed on embowed baffle heat exchangers with smooth tubes,helical baffle heat exchangers with wave-groove tubes,and helical baffle heat exchangers with smooth tubes. The results shows that helical baffle heat exchanger with wave-groove tubes has good heat transfer performance,and spiral angle on the shell side of helical baffle heat exchanger with wave-groove tubes heat transfer effect is larger. Compared with segmental baffle heat exchanger with smooth tubes and 14 embowed baffle plates,as and 5 embowed baffle,the shell side heat transfer coefficient of helical baffle heat exchanger with smooth tubes of which the helical angle are both 9. 8° is improved 4% ~ 60% and 5% ~ 70%. Besides,comparing the helical baffle heat exchanger with wave-groove tubes and the one with smooth tubes,of which the helical angle are both 9. 8°,the heat transfer coefficient of shell side of the former is improved 2% ~ 26% compared to that of the latter,and the heat transfer coefficient of tube side of the former is improved 60% ~ 120% compared to that of the latter. Moreover,for the heat exchangers with wave-groove tubes,of which the the helical angle is 6° and 8°,the heat transfer coefficient of shell side respectively improved 13% ~ 48% and5% ~ 37% compared to that of which the helical angle is 9. 8°.
出处
《世界科技研究与发展》
CSCD
2015年第5期525-528,共4页
World Sci-Tech R&D
关键词
换热器
对比
强化换热
光管
波槽管
螺旋角
heat exchanger
comparison
strengthen heat transfer
smooth tube
wave-groove tube
helical angle
