| 环境风对空冷单元运行性能影响的数值研究 |
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| 引用本文： | 何纬峰,戴义平,马庆中.环境风对空冷单元运行性能影响的数值研究[J].中国电机工程学报,2011,31(20). |
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| 作者姓名： | 何纬峰 戴义平 马庆中 |
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| 作者单位： | 1. 西安交通大学叶轮机械研究所,陕西省西安市,710049
2. 山西省电力科学研究院,山西省太原市,030001 |
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| 摘 要： | 通过加载汽轮机排汽在翅片管换热器中的凝结程序来模拟空气和蒸汽的换热过程，并利用FLUENT风机边界条件和多孔介质模型对空冷单元的空气动力特性进行建模，研究了环境风速对空冷单元风机风量的影响，分析了翅片管换热器换热量随环境风速及风温的变化规律，对比了加装挡风墙前后空冷单元运行性能的变化。计算结果表明：随着环境风速的增大，风机进口处不断扩大的负压区导致风机风量及换热器换热量的下降；环境风温的变化改变了换热器冷端的进口温度，使换热器换热量发生变化。挡风墙削弱了空冷单元热风回流率，但同时降低了风机的风量，两方面的相互作用最终使换热器的换热量几乎没有变化。环境风对空冷单元运行性能的影响规律为进一步研究空冷凝汽器的运行性能提供了理论依据。
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| 关 键 词： | 多孔介质 空冷单元 环境风速 挡风墙 换热量 |
Numerical Study on the Performance of an Air-cooled Condenser Cell Under Wind Influence |
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| HE Weifeng
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DAI Yiping
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MA Qingzhong.Numerical Study on the Performance of an Air-cooled Condenser Cell Under Wind Influence[J].Proceedings of the CSEE,2011,31(20). |
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| Authors: | HE Weifeng DAI Yiping MA Qingzhong |
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| Affiliation: | HE Weifeng 1,DAI Yiping 1,MA Qingzhong 2(1.Institute of Turbomachinery,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China,2.Shanxi Electric Power Research Institute,Taiyuan 030001,Shanxi Province,China) |
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| Abstract: | User defined function(UDF) describing the condensation of the turbine exhaust was loaded to the commercial computational fluid dynamics(CFD) code,FLUENT,to simulate the heat transfer process between the ambient air and the steam.Fan boundary condition and porous medium model were applied to model the aerodynamics characteristic of the air-cooled condenser(ACC) cell.The influence of the wind speed on the fan flow rate was studied,and the change patterns of the wind speed and temperature on the heat transfer ... |
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| Keywords: | porous medium air-cooled condenser cell wind speed wind wall heat transfer rate |
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