西安理工大学学报2016，Vol.32Issue(3)：343-348,6.DOI:10.19322/j.cnki.issn.1006-4710.2016.03.016
不同微肋表面横管外降膜吸收过程中传热特性分析
Analysis of heat transfer properties in falling-film absorption process of different micro fin surfaces out horizontal tubes
摘要
Abstract
In the Lithium Bromide(LiBr)absorption refrigeration system,the heat transfer per-formance of the absorber largely influences the heat transfer performance of the entire refrigera-tion system,so it is necessary to explore how to improve the absorption effect of the absorber. Based on the analysis of heat transfer properties in falling-film absorption outside the smooth tubes,the theoretical analysis and numerical simulation are carried out about the heat transfer en-hanced tubes wrapped with a stainless-steel wire-mesh screen to hold up more liquid film in this paper.The research results show that with an increase of the radius angle,the liquid film thick-ness decreases first and then increases with the thermal boundary layer thickness increasing and the local heat transfer coefficient decreasing.The measurement of wrapping the horizontal tube with a wire-mesh screen can enhance the heat and mass transfer performance in absorber.But if the wire diameter is too big or too small,it will has a bad influence on the heat and mass transfer performance.When the wire diameter is equaling to 0.2mm,the heat transfer performance and the absorption effect are the best.关键词
吸收式制冷/降膜吸收/强化管/数值模拟Key words
absorption refrigeration/falling film absorption/heat transfer enhanced tube/numer-ical simulation分类
通用工业技术引用本文复制引用
王天,谷雅秀,赵润青,屈长杰..不同微肋表面横管外降膜吸收过程中传热特性分析[J].西安理工大学学报,2016,32(3):343-348,6.基金项目
国家自然科学基金资助项目 （）
