Numerical investigation of hot air recirculation of air-cooled condensers at a large power plant

Liu, Peiqing; Duan, Haoyu; Zhao, Wanchun

doi:10.1016/j.applthermaleng.2008.09.011

Cited by 79 publications

(26 citation statements)

References 7 publications

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“…Variation of HRR with wind speed also numerically investigated by Liu et al [11]. Fig.7 shows HRR increases with the increases of the wind speed upto 25 m/s and the peak value of the HRR arises at wind speed of 25 m/s.…”

Section: Fig7 the Variation Of The Hrr With The Increases Of The Winmentioning

confidence: 84%

“…Because of it large eddies with low pressure between the factory building and the ACSC are generated and due to this a strong hot air plume inlet to the fan. Liu et al [11], Numerically investigated the increased of hot air recirculation under different wind speed and wind direction and they give suggestion that to increasing the wind wall height and accelerating the rotational speed of the fans near the edge of the ACC platform for reducing the effect of hot air recirculation on the performances of ACC system. They consider three wind speeds according to meteorological data in recent several years that the velocity magnitude is 4, 8, and 25 m/s are selected, against eight different angles of the wind direction.…”

Section: Fig5 Heat Transfer Effectiveness At Column 4 Under Windy Comentioning

confidence: 99%

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A Critical Review on Operating Condition for the Performance of Air Cooled Condenser Used in Thermal Power Plant

2017

IJAERD

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Section: Fig7 the Variation Of The Hrr With The Increases Of The Winmentioning

confidence: 84%

Section: Fig5 Heat Transfer Effectiveness At Column 4 Under Windy Comentioning

confidence: 99%

A Critical Review on Operating Condition for the Performance of Air Cooled Condenser Used in Thermal Power Plant

2017

IJAERD

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“…Duvenhage and Kroger [2] investigated the influence of wind on fan performance and cooling air recirculation in air-cooled condenser bank by CFD simulation and found that cross winds significantly reduced the air flow rate in the upwind condenser cells and the winds along the longitudinal axis caused increased hot plume air recirculation. Liu et al [3] numerically simulated the effects of wind speed and direction on hot air recirculation of air-cooled condensers and two measures to increase the wind-wall height and accelerate the rotational speed of the fans near the edge of ACC (air-cooled condenser) platform were developed. Wang et al [4] investigated the overall flow and temperature fields of the air in the whole power plant by CFD simulation and found that the plume recirculation occurred in each case due to the wind effect and the suction of the fan.…”

Section: Introductionmentioning

confidence: 99%

Measures against the adverse impact of natural wind on air-cooled condensers in power plant

Yang

2010

Sci. China Technol. Sci.

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The natural wind plays disadvantageous roles in the operation of air-cooled steam condensers in power plant. It is of use to take various measures against the adverse effect of wind for the performance improvement of air-cooled condensers. Based on representative 2×600 MW direct air-cooled power plant, three ways that can arrange and optimize the flow field of cooling air thus enhance the heat transfer of air-cooled condensers were proposed. The physical and mathematical models of air-cooled condensers with various flow leading measures were presented and the flow and temperature fields of cooling air were obtained by CFD simulation. The back pressures of turbine were calculated for different measures on the basis of the heat transfer model of air-cooled condensers. The results show that the performance of air-cooled condensers is improved thus the back pressure of turbine is lowered to some extent by taking measures against the adverse impact of natural wind.air-cooled condenser, wind speed and direction, flow and heat transfer, back pressure, power plant Citation:Yang L J, Du X Z, Yang Y P. Measures against the adverse impact of natural wind on air-cooled condensers in power plant.

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“…While sometimes undesired vortices would be produced by the ambient environment around ACC. It would lead plume recirculation [5]. Hot air may re-entered in the inlet of the fans under ACC.…”

Section: Background Introductionmentioning

confidence: 99%

Investigation of a New Installation for Improving the Efficiency of the Air-Cooled Condenser Fans in Thermal-Power Plants

Yan¹,

Li²,

Ding³

2016

World Congress on Mechanical, Chemical, and Material Engineering

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A new installation for improving the efficiency of the air cooled condenser (ACC) heat exchange has been proposed in a patent and its performance is investigated in current paper. This installation can be used in air-cooled condenser power plants. The installation is simple and it is designed to be installed around ACC platform. The installation is called "ACC protecting shield". The performance of "ACC protecting shield" is investigated by CFD simulation. A series of wind environment conditions are simulated. The simulation results show that there would be significant improvements of the heat exchange efficiency when the installation is applied. The improvements include two aspects: first, flow rate of ACC fans would enhance. And second, plume recirculation would relieve. For 2m/s wind velocity condition, the average temperature of fans' inlet will drop remarkably (more than 0.78K)， and the fans' flow rate will increase more than 1% .

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Numerical investigation of hot air recirculation of air-cooled condensers at a large power plant

Cited by 79 publications

References 7 publications

A Critical Review on Operating Condition for the Performance of Air Cooled Condenser Used in Thermal Power Plant

A Critical Review on Operating Condition for the Performance of Air Cooled Condenser Used in Thermal Power Plant

Measures against the adverse impact of natural wind on air-cooled condensers in power plant

Investigation of a New Installation for Improving the Efficiency of the Air-Cooled Condenser Fans in Thermal-Power Plants

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