Cooling Performance Optimization of Direct Dry Cooling System Based on Partition Adjustment of Axial Flow Fans

Wenhui Huang, Lei Chen, Weijia Wang, Lijun Yang and Xiaoze Du
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Wenhui Huang: Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, Beijing 102206, China
Lei Chen: Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, Beijing 102206, China
Weijia Wang: Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, Beijing 102206, China
Lijun Yang: Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, Beijing 102206, China
Xiaoze Du: Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, Beijing 102206, China

Energies, 2020, vol. 13, issue 12, 1-22

Abstract: Axial flow fans play key roles in the thermo-flow performance of direct dry cooling system under windy conditions, so the energy efficiency of a power generating unit can be improved by optimizing the operation strategies of the axial flow fans. In this work, various measures based on the partition adjustment of axial flow fans with constant power consumption of a 2 × 660 MW power plant are studied by computational fluid dynamics (CFD) methods. The results show that increasing the rotational speed of the windward fans is beneficial to reduce the inlet air temperature and increase the mass flow rates of the fans, which enhance the heat rejections of the air-cooled condensers, especially at high wind speeds. Moreover, the turbine back pressures for the optimal and original cases are achieved by iterative methods, with the largest drop of 2.77 kPa at the wind speed of 12 m/s for 110-case 3 in the wind direction of −90°. It is recommended to adopt 110-case 1 and 110-case 3 at low and high wind speeds, respectively, in the wind directions of 90° and −90°, while 110-case 2 is always the best choice in the 0° wind direction.

Keywords: direct dry cooling system; air-cooled condenser; axial flow fan; partition adjustment; cooling performance; turbine back pressure (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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