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第 42 卷第 3 期上海交通大学学报 Vol. 42 No. 3
2008 年 3 月 J OURNAL OF SHAN GHAI J IAO TON G UNIV ERSIT Y Mar. 2008
文章编号:1006 2467 (2008) 03 0399 05
翅片管换热器结霜过饱和模型
廖云虎, 丁国良, 林恩新, 黄兴华
(上海交通大学制冷与低温工程研究所, 上海 200240)
摘要: 在2改2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
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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
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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.
关键词: 翅片管换热器; 结霜; 过饱和度; 模型
中图分类号: T K 124 文献标识码: A
Supersaturation Model of Finned tube Heat
Exchangers under Frosting Conditions
L I A O Yun hu , D I N G Guo li ang , L I N En x i n , HUA N G X i ng hua
(Institute of Refrigerant & Cryogenics Engineering , Shanghai Jiaotong University , Shanghai 200240 , China)
Abstract : The water vapor at frost surface is found to be supersat urated. This paper improved t he equation
of calculating t he water vapor supersat uration degree at frost surface , and described a numerical model
which uses supersat urated water vapor at t he frost surface to predict the frost growt h for finned t ube heat
exchangers. The mass of frost accumulated on t he heat exchanger surface , t he overall energy transfer coef
ficient , frost density and t hickness were calculated. The supersat uration model pared to the exper
imental data , and it was found t hat t his model shows good ability to predict the frost growt h for finned
t ube heat exchangers.
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