Performance of Direct Air-Cooled Condenser Under Windy Conditions and Its Influencing Factors

doi:10.11930/j.issn.1004-9649.2013.11.113.5

Abstract

Abstract: The environmental wind has significant effects on the heat transfer efficiency of direct air-cooled condensers. By way of the example of a 300-MW direct air-cooled condenser, the models of the air-cooled island and the heat exchanger units are built for numerical analysis. The effects of the environmental wind on the heat transfer efficiency of the air-cooled condenser are studied, and the dominant factor contributing to the reduction of the efficiency under windy conditions is found out. The result shows that the air inlet temperature at the edge of the heat exchanger units is greatly influenced by the environmental wind due to the hot air recirculation and the backward flow; the air inflow of the heat exchanger units on the upwind side is also seriously affected by the environmental wind since there is a negative pressure zone existing that lowers the performance of the fan. The decrease of the air inflow due to the fan performance degradation is the major factor affecting the performance of the air-cooled condenser.

Key words: direct air-cooled condenser, air-cooled unit, numerical simulation, dominant factor

CLC Number:

TK264.1⁺1

GAO Pei, ZHANG Xue-lei. Performance of Direct Air-Cooled Condenser Under Windy Conditions and Its Influencing Factors[J]. Electric Power, 2013, 46(11): 113-118.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.11.113.5

https://www.electricpower.com.cn/EN/Y2013/V46/I11/113

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