翅片管换热器结霜过饱和模型  

Supersaturation Model of Finned-tube Heat Exchangers under Frosting Conditions

作　　者：廖云虎[1] 丁国良[1] 林恩新[1] 黄兴华[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《上海交通大学学报》2008年第3期399-403,共5页Journal of Shanghai Jiaotong University

摘　　要：在改进现有霜表面水蒸气过饱和度计算公式的基础上,建立了翅片管换热器结霜过饱和模型,计算出了4个随时间变化的参数:结霜量、能量传递系数、霜层密度和厚度.实验数据表明,该模型能够有效地预测翅片管换热器结霜过程中的传热和传质现象.The water vapor at frost surface is found to be supersaturated. This paper improved the equation of calculating the water vapor supersaturation degree at frost surface, and described a numerical model which uses supersaturated water vapor at the frost surface to predict the frost growth for finned-tube heat exchangers. The mass of frost accumulated on the heat exchanger surface, the overall energy transfer coefficient, frost density and thickness were calculated. The supersaturation model was compared to the experimental data, and it was found that this model shows good ability to predict the frost growth for finnedtube heat exchangers.

关 键 词：翅片管换热器 结霜 过饱和度 模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]