Numerical simulation and analysis of the hot air recirculation phenomenon observed in direct air-cooled system

Author

Zhao, Wensheng ; Lei, Ming ; Wang, Songling ; Cui, Ning ; Liu, Yang

Author_Institution

Sch. of Energy & Power Eng., North China Electr. Power Univ., Baoding

fYear

2008

fDate

3-5 June 2008

Firstpage

1624

Lastpage

1628

Abstract

The hot air recirculation phenomenon observed in direct air- cooled system is numerical simulated and the causes of the hot air recirculation and its influence on air-cooled units are qualitatively analyzed with the help of computational fluid dynamics (CFD) software. The results indicate that the hot air recirculation is a common trouble in the air-cooled power units. It is provoked by the arrangement of the air-cooled island and the environmental condition around the direct air-cooled system, especially the strong wind. The hot air recirculation greatly reduces the heat transfer ability, which will worsen units´ vacuum and cause the power units to trip out.

Keywords

computational fluid dynamics; condensers (steam plant); heat transfer; numerical analysis; air-cooled island; air-cooled power units; computational fluid dynamics software; direct air-cooled system; environmental condition; heat transfer ability; hot air recirculation phenomenon; numerical analysis; numerical simulation; Atmospheric modeling; Computational fluid dynamics; Computational modeling; Cooling; Ducts; Equations; Heat transfer; Numerical simulation; Power generation; Turbines; computational fluid dynamics ( CFD ); direct air-cooled system; hot air recirculation; numerical simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications, 2008. ICIEA 2008. 3rd IEEE Conference on

Conference_Location

Singapore

Print_ISBN

978-1-4244-1717-9

Electronic_ISBN

978-1-4244-1718-6

Type

conf

DOI

10.1109/ICIEA.2008.4582794

Filename

4582794