制冷技术2016，Vol.36Issue(1)：35-39,45,6.DOI:10.3969/j.issn.2095-4468.2016.01.108
立式螺旋折流板冷凝器内制冷剂流型和换热特性的数值模拟
Numerical Simulation of Flow Pattern and Heat Transfer Characteristics of Refrigerant in Vertical Condenser with Helical Baffles
摘要
Abstract
The condensation heat transfer characteristics of the vertical condensers with variable angled trisection helical baffles with single or double thread and with a variable spanned segmental baffle were numerically studied and compared. The physical models of the trisection helical baffle condensers and the segmental baffle one were developed. The distributions of the velocity and pressure of vapor and the volumes of fraction of condensate in these heat exchangers were simulated with the mixing module of Fluent software. The simulation results show that, the variable angled trisection helical baffle vertical condenser with double-threads could significantly improve the condensation heat transfer coefficient, and the average shell-side heat transfer coefficient of the vertical condenser with dual-thread variable angled trisection helical baffles is 35.7%higher than that of the variable spanned segmental baffled one. The liquid dam plus drainage gaps on each inclined baffle plate could drain condensate effectively and prevent liquid film entrainment into vapor, thus it overcomes the limitation of the conventional vertical condensers which could not drain condensate effectively with horizontal segmental baffles.关键词
立式冷凝器/三分螺旋折流板/挡液堰/疏液缺口/冷凝Key words
Vertical condensers/Trisection helical baffles/Liquid dam/Drainage gaps/Condensation引用本文复制引用
郭亚,林丽,陈亚平,吴嘉峰..立式螺旋折流板冷凝器内制冷剂流型和换热特性的数值模拟[J].制冷技术,2016,36(1):35-39,45,6.基金项目
国家自然科学基金项目（No.51276035、51206022）；江苏省科技创新与成果转化专项引导资金项目（No.BY2011155）。 （）
