化工学报2011，Vol.62Issue(12)：3381-3385,5.DOI:10.3969/j.issn.0438-1157.2011.12.011
水平管降膜蒸发器传热系数空间分布
Distribution of heat transfer coefficient in horizontal-tube falling film evaporator
摘要
Abstract
A set of experimental facilities was set up to measure the heat transfer coefficient of horizontaltube falling film evaporator. The effects of spray density on the topmost row Γ and evaporating temperature T on the overall heat transfer coefficient K are studied. The heat transfer coefficient distribution in the evaporator is presented. The results indicate that increase of spray density and evaporating temperature helps to enhance the value of K. Along the axial direction of the tube, K increases at the first 5 m and then decreases in the following 3 m, mainly caused by the condensation inside the tube. The K value decreases from the upper rows to the lower rows. In addition, increase of number of tube rows reduces the K value, especially at low spray density.关键词
水平管降膜蒸发器/传热系数/喷淋密度/管内凝结Key words
horizontal-tube falling film evaporator/ heat transfer coefficient/ spray density/ condensation in tube分类
海洋科学引用本文复制引用
沈胜强,梁刚涛,龚路远,牟兴森,刘瑞,刘晓华..水平管降膜蒸发器传热系数空间分布[J].化工学报,2011,62(12):3381-3385,5.基金项目
国家自然科学基金项目(50976016) （50976016）
辽宁省科学技术计划项目(2008220040) （2008220040）
上海市科委科研计划项目(09DZ1200502) （09DZ1200502）
中央高校基本科研业务费专项资金(DUT10ZD109). （DUT10ZD109）
