Journal
APPLIED THERMAL ENGINEERING
Volume 123, Issue -, Pages 810-819Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.05.151
Keywords
Air-cooled steam condenser; Numerical model; Fan array; Blade angle regulation; Net power
Funding
- National Natural Science Foundation of China [51406081]
- China Postdoctoral Science Foundation [2016M601801]
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For enough cooling air flowing through the finned tube heat exchangers, the performance of the forced draught fans are always pivotal for the final characteristics of the air-cooled steam condenser (ACSC) as well as the power station. Hence, it is necessary to optimize the fan operation for a superior performance. In this paper, a previous numerical model is designated to execute the impact analysis from the blade angle regulation for forced draught fans with different positions on the performance of the air-cooled system at the prevailing wind angle of beta = 22.5 degrees. The simulation results indicate the fan volumetric effectiveness, heat transfer rate and the related equilibrium back pressure are influenced significantly once the fan blade angle is regulated. Compared with the design case, it is found that a maximum elevation of net power, 17.76 MW, is obtained for the fan array case when the wind speed is v(m), = 2 rn.s(-1). Furthermore, it is found that the windward and peripheral case almost have a same effect to raise the net power of the power plant. (C) 2017 Elsevier Ltd. All rights reserved.
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