2013年第1期（总第181期）
doi:10.3969/j. issn. 1009 3230.2013.01.003
应用能源技术
环境风对某600MW直接空冷凝汽器
影响的数值分析
孙会亮”，索新良”
11
（1.华北电力大学，河北保定071003，2.淮浙煤电有限公司风台发电分公司，安徽淮南232000）
摘要：以某600MW直接空冷机组为例，利用CFD软件对其建立数值模型，采用Fluent软件对流场进行数值模拟。通过数值模拟，分析了环境风对直接空冷凝汽器换热影响。计算结果指出：当风速小于2m/s时环境风对凝汽器换热基本没有影响，当风速大于7m/s时，凝汽器换热恶化严重；在风速由0m/s上升至13m/s时空冷凝汽器的风机流量偏差率增加了41%；当风速由2m/s上升至7m/s时换势效率降低了14.1%：指出了环境风温变化对凝汽器换热的影响。通过分析获得了环境风速、风温变化对直接空冷凝汽器的影响，为空冷凝汽器进一步优化设计提供了理论依据。
关键调：空冷岛；数值模拟；流量偏差率；换热效率
中图分类号：TK264文献标志码：A文章编号：1009-3230(2013)01-0011-03 NumericalAnalysisofImpactforEnvironmentalWindupon
Air-cooledIsland of a6ooMWDirectair-cooledUnit
SUN Hui-liang",SUO Xin-liang
(1.North China Electric Power University,Baoding 071003,China;2.Huizhe Coal Electricity Power Company Limited Fengtai Generation Branch, Huinan 232000, China)
Abstract: A numerical model for a 600 MW air-cooled island was made by CFD software, the numerical simulation of the flow filed of it was made with FLUENT. By numerical simulation, analys the impact of the direct air-cooled condenser exchanger flow effects environmental wind. The results indicate that: environmental wind basically have no impact on the condenser heat exchanger when the wind speed is less than 2m/s,but it is serious deterioration when the wind speed is greater than 7m/ s; The flow rate of deviation of air-cooled condenser fan increases 41% when the wind speed increased from Om/s to 13m/s; Heat transfer efficiency of 14. 1% when the wind speed increased from 2m/s to 7m/s; Pointed out the impact of changes in the environmental air temperature on the condenser heat exchanger. The results indicated the influence of the change of environmental wind speed and temperature on the direct air-cooled condenser. The research results provide some theory evidence for the optimization of the effect of air-cooled islands heat transfer.
Key words: Air-cooled island; Numerical Simulation; Flow rate of deviation; Heat transfer efficiency
0
近年来，新建的机组大多采用直接空冷疑汽器作为电厂冷端的冷却系统，据有关资料显示，空
收稿日期：2012-11-11
修订日期：20121128
作者简介：孙会亮（1986-），男，碳士在读，主要研究方向为
直接空冷机组节能。
万方数据
冷机组比传统湿冷机组节水约70%左右[1-2]。
由于直接空冷机组的凝汽器是通过直接与围空气进行热交换来达到冷凝排汽的，因此环境风的变化将会直接影响直接空冷系统的运行特性[3]。目前，对环境风对空冷凝汽器运行性能的