1000MW凝汽器的非均匀管束间距布置方式数值模拟研究  

Numerical Study on the Non-uniform Spacing Arrangement of Bundles in a 1000MW Power Plant Condenser

作　　者：祝培旺 尹韬烨 霍兵 匡云 王辉 张春琳 王坚 郭金菊 罗坤[2] ZHU Pei-wang;YIN Tao-ye;HUO Bing;KUANG Yun;WANG Hui;ZHANG Chun-lin;WANG Jian;GUO Jin-ju;LUO Kun(China Power Engineering Consulting Group Central Southern Electric Power Design Institute Company Limited,Wuhan 430071,China;State Key Laboratory of Clean Energy Utilization,College of Energy Engineering,Zhejiang University,Hangzhou 310007,China;Huanggang Dabieshan Power Generation Company Limited,Huanggang 438300,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,武汉430071 [2]浙江大学能源清洁利用国家重点实验室,杭州310007 [3]黄冈大别山发电有限责任公司,黄冈438300

出　　处：《汽轮机技术》2021年第2期97-101,共5页Turbine Technology

基　　金：浙江省教育厅科研项目(No:Y201840482)。

摘　　要：为了克服多孔介质模型的不足,开发了用户自定义函数模型来研究含非凝性气体的蒸汽在1000MW机组电站冷凝器内的流动和传热。该模型通过用户自定义函数模拟混合气在冷凝管表面的冷凝和对流过程,可以考虑不同管束布置方式的影响。研究了两种不同管束排列布置,即非均匀管束间距布置和均匀管束间距布置对流动和冷凝过程的影响。结果表明,含有不凝结气体的蒸汽在凝汽器内部流动时,空气都集中在空冷区,管束区域汽阻较大,严重影响冷凝器的性能。相比于均匀管束间距布置,非均匀管束间距布置的进出口压降较小,但换热性能较差。In order to solve the problem that the porous medium model is not suitable for tube spacing arrangement analysis,a user-defined function(UDF)model is developed to simulate the condensation and convection process of the mixture of steam containing non-condensable gases on the surface of the condenser tube in a 1000MW power plant condenser.In this model,the effects of differenttube bundle arrangements can be taken into account.Two different tube bundle arrangements are mainly investigated,namely the non-uniform tube spacing arrangement and the uniform tube spacing arrangement.It is found that when the non-condensed steam flows inside the condenser,the air is concentrated in the air-cooling zone,and the tube bundle region has a large vapor resistance,which seriously affect the performance of the condenser.The pressure drop of the non-uniform tube bundle arrangement is smaller than that of the uniform tube bundle arrangement,but the heat transfer performance is poor.

关 键 词：凝结 传热 管束布置 减阻 管间距 

分 类 号：TK264.11[动力工程及工程热物理—动力机械及工程]