摘要
氟塑料换热器优良的耐腐蚀特性,为电厂低温烟气余热回收提供了新的解决途径。针对氟塑料换热器开展实验研究,氟塑料换热管束表面光滑对层流边界层的附加扰动较弱,管外对流传热系数较金属换热材料偏低。茹卡乌斯卡斯经典关联式直接应用于塑料换热器存在约40%偏差。结合风洞实验数据,得到换热器在不同风速下的总传热系数、管外对流传热系数、空气阻力特性和各环节热阻分布特性。
Fluorine plastic heat exchangers have the excellent property of corrosion resistance, which can be used for the heat recovery of low temperature flue gas. In this paper, fluorine plastic heat exchangers were investigated by combination of experiment. Because the disturbance of laminar boundary layer, caused by smooth fluorine plastic heat exchange tube, is weak, the tube outside heat transfer coefficient of fluorine plastic usually is smaller than that of metal materials. Normally, if used directly, Juca UZ Castro correlation may cause 40% deviations. The heat transfer performance was tested on a wind tunnel to obtain the variations of total heat transfer coefficient, airside heat transfer coefficient, airside pressure drop and thermal resistance distribution of heat exchangers with different wind velocity.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第8期2297-2303,共7页
Proceedings of the CSEE
基金
国家自然科学基金项目(51436006)
中央高校基本科研业务费专项基金(2015ZZD10)~~
关键词
氟塑料
换热器
传热模型优化
传热性能
实验研究
fluorine plastic
heat exchangers
optimization of heat transfer model
heat transfer performance
experimental study
