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ABSTRACT
To improve the heat exchange of air-cooled condenser unit (ACCU), the numerical simulations of ACCU with a new swirling device (named swirler) installed at outlet of the fan (improved air-cooled condenser unit, named IACCU) is executed, under various vane angles of different swirlers compared to the same conventional air-cooled condenser unit (CACCU) without swirler. The swirl intensity theory is presented, and the flow fields and temperature distributions of the IACCUs are obtained and compared with that of the CACCU. The simulated results show that the heat transfer characteristic and the flow field characteristic of the IACCU are both better than that of the CACCU. The vane angle of the swirler is optimized for the IACCUs with four different kinds of swirlers, and the most effective one of these devices is found out.
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Notes on contributors
You Liang Cheng
You Liang Cheng is a Professor in the School of Energy Power and Mechanical Engineering, North China Electric Power University, China. His research interests include air-cooled technique, water intake-outlet layout in power plant, liquid film theory and application dynamics. He is on the editorial board of journal of hydrodynamics. He has co-authored more than 50 papers in archival journals and conference proceedings.
Ning Zhang
Ning Zhang is a M.S. student at the school of Energy Power and Mechanical Engineering, North China Electric Power University, China, under the supervision of Prof. Cheng. She is currently working on fluidity and heat transfer of directed air-cooled condenser unit.
Ze Min Ren
Ze Min Ren is an M.S. student at the School of Energy Power and Mechanical Engineering, North China Electric Power University, China. He is currently working in Tianjin Datang International Panshan Power Generation Co. Ltd.
Fei Guo
Fei Guo graduated with an M.S. from the School of Energy Power and Mechanical Engineering, North China Electric Power University, China. He is currently working in Harbin Boiler Factory Co. Ltd.