2018传热传质学年会集

2．重庆大学工程热物理研究所，重庆400030) Email:热器余热回收率从74.6%进一步提高至91.54%。1所示。该试验平台主要由中低温烟2-3-4-5-6-7-L=700mm1所示，三维肋管结构如图2所示。23个(a)肋结构示意图 (b)三维肋管实物图图2三维肋管及其肋结构S1=72 (a)三维肋管换热器结构示意图 (b)三维肋管换热器现场实物图图3三维肋管换热器结构和和现场实物图Qgmgcpgtg,otg,iQamacpata,ota,i

gaio为出口。

K

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式中，Y为因变量，△Y为因变量的误差；x为自变量，△x为自变量的误差。根据公式4.6%。图4所示。K拟合曲线K拟合曲线KK/(W/m230003500400045005000550060006500700075008000维肋管换热器的总传热系数约由8%增大至16%。30003500400045005000550060006500700075008000350℃、Re35008000时，三维肋管换热器的压降增大约在不同烟气温度条件下(210℃350℃)400Nm3/h，改变冷分别如图6和图7所示。2K2K/(W/m 提高至23%。降提高约40%~58%。余热回收率余热回收率余热回收率余热回收率0

为了进一步探究三维肋管换热器的余热回收性能，在烟气流量为500Nm3/h、换热器烟气温度为540℃的条件下，获得了三维肋管换热器在不同空气流量下的余热回收性能，结果如图9所示。从图上可知，随着空气流量的增加，三维肋管换热器的余热回收余热回收率余热回收率

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