制冷用水平管降膜蒸发器管束换热特性数值模拟Numerical Simulation of the Heat Transfer Performance of Horizontal Falling Film Evaporator in the Large Refrigeration Systems
杨培志,张营,李晓
YANG Pei-Zhi,ZHANG Ying,LI Xiao
摘要(Abstract)：
采用分布参数法建立水平管降膜蒸发器管束换热模型,模拟计算了水平管降膜蒸发器不同管程布置下换热管干斑分布和平均降膜因子,并进行比较分析;并在下进上出的管程布置形式下研究了制冷剂流量、管间距、满液区排管数对蒸发器换热性能的影响。本文的研究为水平管降膜蒸发器的设计提供理论指导,促进其在制冷空调领域的推广应用。
A theoretical thermodynamic model with distributed parameters was developed for simulating the falling film heat transfer performance,and in this model the effect of film breakdown( or dry patch) is considered. In this simulation,the distribution of dry patch,average falling film factor is obtained,and the effect of the tube bundle layout,refrigerant mass flow rate,tube pitch,the flooded tube row amount is also analyzed. This study is a contribution for the design of horizontal falling film evaporators and promote their application in the field of refrigeration and air conditioning.
关键词(KeyWords)：
降膜蒸发;数值模拟;分布参数法;管束换热特性
falling film evaporator;numerical simulation;distributed parameter method;heat transfer performance of tube bundle
基金项目(Foundation): 中南大学中央高校基本科研业务专项资金资助项目
作者(Author):
杨培志,张营,李晓
YANG Pei-Zhi,ZHANG Ying,LI Xiao
参考文献(References)：
- [1]RIBATSKI G,JACOBI A M.Falling-film evaporation on horizontal tubes—a critical Review[J].International Journal of Refrigeration.2005,28:635-653.
- [2]王学会,袁晓蓉,吴美,等.制冷用水平降膜式蒸发器研究进展[J].制冷学报,2014,35(2):19-29.
- [3]Ribatski G,Thome J R.Experimental study on the onset of local dryout in an evaporating falling film on horizontal plain tubes[J].Experimental Thermal and Fluid Science.2007,31:483-493.
- [4]Roques J F,Thome J R.Falling Films on Arrays of Horizontal Tubes with R-134a,Part I:Boiling Heat Transfer Results for Four Types of Tubes[J].Heat Transfer Engineering.2007,28(5):398-414.
- [5]Roques J F,Thome J R.Falling Films on Arrays of Horizontal Tubes with R-134a,Part II:Flow Visualization,Onset of Dryout,and Heat Transfer Predictions[J].Heat Transfer Engineering.2007,28(5):415-434.
- [6]王小飞,何茂刚,张颖,等.水平管降膜蒸发器管外液体流动数值模拟[J].工程热物理学报,2008,29(8):1347-1350.
- [7]阮并璐,刘广彬,赵远扬,等.制冷系统中水平管降膜式蒸发器内部流动数值模拟[J].西安交通大学学报,2008,42(3):318-322.
- [8]邱庆刚,陈金波.管束排列方式及管间距对水平管外液体成膜情况的影响分析[J].热科学与技术,2011,10(2):117-122.
- [9]杨丽,王文,周加强.水平管降膜蒸发器管束结构优化数值模拟[J].山东建筑大学学报,2012,27(2):193-197.
- [10]杨丽,王文,白云飞,等.水平管降膜蒸发器传热优化研究[J].工程热物理学报,2009,30(11):1913-1916.
- [11]翟玉燕,黄兴华.基于分布参数模型的水平管式降膜蒸发器模拟[J].机械工程学报,2009,45(7):284-290.
- [12]许莉,王世昌,王宇新,等.水平管外壁液膜流动状态及其对传热的影响[J].化工学报,2002,53(6):555-559.
- [13]张丽娜,高长银,刘敏姗.新型百叶窗翅片对流换热特性研究[J].压力容器,2014,31(5):46-50.
- [14]夏源,徐厚达,王守国,等.小尺度蒸发器的数值模拟及优化研究[J].流体机械,2014,42(1):57-62.
- [15]曹湘琪,姚斌,郑勤红,等.圆柱形微波加热器加热效率及均匀性仿真分析[J].包装与食品机械,2014,32(6):29-31.
- [16]王银龙,邓科,杨明辉,等.水平管束冷凝换热设计计算问题讨论[J].化工设备与管道,2014,51(3):25-29,39.
- [17]陈爱华,杜炜东,戴亚东,等.煤矿井下空调蒸发器对流传热特性试验[J].流体机械,2014,42(12):64-67.
- [18]侯昊,毕勤成,马红,等.水平管降膜厚度分布特性及对传热的影响[J].西南交通大学学报,2011,46(6):1013-1018.
- [19]张颖,吕凯,王小飞,等.布液方式对水平蒸发管管间流型转换的影响[J].西安交通大学学报,2012,46(1):19-23,29.
- [20]郭磊,李敏霞,马一太,等.制冷系统用新型水平管降膜蒸发[J].化工学报,2013,64(11):3894-3902.