Title :
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
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;
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
DOI :
10.1109/ICIEA.2008.4582794
