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

Yang, Linlin; Du, Xiaoze; Yang, Yongping

doi:10.1007/s11431-010-0094-4

Cited by 40 publications

(30 citation statements)

References 13 publications

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“…And this increase in inlet temperature is responsible for deterioration of the cooling capacity of the air through the upwind condenser cell. Also they [22] suggested it is clear from fig.2-2(a) there is no cooling air found to flow into the upwind condenser cells but the reversed flows from the outlet of the condenser cell to the inlet occurs which is again reducing the cooling capacity of air. L.J.Yang [22] shows from fig.2-2 (a and b) that the hot plume recirculation flow occurring for the condenser cell at the both sides.…”

Section: Wind Break Wallmentioning

confidence: 99%

“…Also they [22] suggested it is clear from fig.2-2(a) there is no cooling air found to flow into the upwind condenser cells but the reversed flows from the outlet of the condenser cell to the inlet occurs which is again reducing the cooling capacity of air. L.J.Yang [22] shows from fig.2-2 (a and b) that the hot plume recirculation flow occurring for the condenser cell at the both sides. fig.2-3 Conclude that due to recirculation of hot plume there is increased in the inlet temperature of AF.…”

Section: Wind Break Wallmentioning

confidence: 99%

“…But, most of the investigator done numerical solution without taking consideration of the turbine boiler buildings. L.J.Yang [22] suggest wind break wall mounted on the acc platform is considered to effective inn improvement of thermo flow characteristics of the ACC, but when the studies with the turbine and boiler buildings on power plants are carried out wind break wall shows some negative effect on performance of the ACC AF. L.J.Yang, X.Z.Du.…”

Section: Wind Break Wallmentioning

confidence: 99%

See 2 more Smart Citations

Review on Wind Effect and Axial Fan Performance of Air Cooled Condenser for a Thermal Power Plant

2017

IJAERD

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Section: Wind Break Wallmentioning

confidence: 99%

Section: Wind Break Wallmentioning

confidence: 99%

Section: Wind Break Wallmentioning

confidence: 99%

See 1 more Smart Citation

Review on Wind Effect and Axial Fan Performance of Air Cooled Condenser for a Thermal Power Plant

2017

IJAERD

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“…The steady-state fluid and heat flow governing equations on the air-side of the ACCs are as follows [17]:…”

Section: Computational Modelsmentioning

confidence: 99%

“…The experiment was conducted in a 4×600 MW direct-dry cooling power plant in the Shaanxi province of China [17]. The modeling and numerical solution methods used in the 4×600 MW power plant simulation are the same as those used for the 2×600 MW power plant in this paper.…”

Section: ( ) 10mentioning

confidence: 99%

Numerical investigation on the cluster effect of an array of axial flow fans for air-cooled condensers in a power plant

Yang

Zhang

et al. 2011

Chin. Sci. Bull.

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The aerodynamic behavior of tens of axial flow fans incorporated with air-cooled condensers in a power plant is different from that of an individual fan. Investigation of the aerodynamic characteristics of axial flow fan array benefits its design optimization and running regulation. Based on a representative 2600 MW direct-dry cooling power plant, the flow rate of each fan and the overall flow rate of the fan array are obtained in the absence of ambient wind and at various wind speeds and directions, using CFD simulation. The cluster factor of each fan and the average cluster factor of the fan array are calculated and analyzed. Results show that the cluster factors are different from each other and that the cluster effect with ambient wind is significantly different from the cluster effect with no wind. The fan at the periphery of the array or upwind of the ambient wind generally has a small cluster factor. The average cluster factor of the array decreases with the increasing wind speeds and also varies widely with wind direction. The cluster effect of the axial flow fan array can be applied to optimize the design and operation of air-cooled condensers in a power plant. An increased focus on water conservation has combined with continued concern over the environmental effects of both once-through and evaporative cooling, resulting in increased popularity of dry cooling technology. In particular, the use of air-cooled condenser (ACCs) in power plants for condenser heat rejection is expected to increase [1]. Largescale, air-cooled condensers in a power plant consists of an array of the condenser cells. For each condenser cell, the finned tube bundles are arranged in the form of an A-frame fitted with an axial flow fan below. Ambient air is impelled by the fans to flow through the finned tube bundles and the thermal duty of the exhaust steam from the turbine is removed in the air-cooled condensers. Many studies have found that finned tube bundles and axial flow fans work poorly in a wide range of specific climates, especially with large wind speeds and adverse wind directions.Meyer and Kroger [2] developed a numerical model to simulate the effect of an axial flow fan on the velocity field in the vicinity of the fan blades. In this model, the axial flow fan is regarded as an actuator disc. By using the actuator disc fan model, Meyer [3] numerically studied the effect of inlet flow distortions and found that inlet flow losses of the periphery fan are dominated by flow separation around the inlet lip of the fan inlet section. These flow losses can be reduced by the installation of a walkway at the edge of the fan platform or by removal of the periphery fan inlet section. Hotchkiss et al. [4] used computational fluid dynamics (CFD) methods to investigate the effects of ambient wind cross flows on the performance of axial flow fans in air-cooled condensers. van Rooyen and Kroger [5] studied the air flow around and through certain air-cooled condensers, assessing the performance of the fan with the actuator disc model....

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Rotational speed adjustment of axial flow fans to maximize net power output for direct dry cooling power generating units

Chen

Sun

Yang

et al. 2019

Heat Trans. Asian Res.

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The power consumption of axial flow fans may account for more than 1% of the rated power output of the power generating unit, so it is of benefit to the energy efficiency of the power generating unit to propose an operation adjustment approach to axial flow fans. On the basis of representative 2 × 600 MW direct dry cooling generating units, a computational model of air-side flow and heat transfer of an air-cooled condenser (ACC) combined with exhaust steam condensation is developed, by which the airflow rate, inlet air temperature of ACCs, the power consumption of axial flow fans, turbine backpressure, and net power output of power generating units at various wind speeds and in various wind directions are obtained. The results show that the net power output in the presence of winds always decreases when the rational speeds of the first upwind row axial flow fans increase from the rated speed of 79 rpm by 10% to 86.9 rpm. However, the net power output will increase in various wind directions if the rational speeds of all the fans except the upwind first row fans increase to 86.9 rpm. This can contribute to the optimal operation of the ACC by rotational speed adjustment of axial flow fans. K E Y W O R D S air-cooled condenser, axial flow fan, backpressure, power generating unit, power output, rotational speed regulation | 361

show abstract

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

Cited by 40 publications

References 13 publications

Review on Wind Effect and Axial Fan Performance of Air Cooled Condenser for a Thermal Power Plant

Review on Wind Effect and Axial Fan Performance of Air Cooled Condenser for a Thermal Power Plant

Numerical investigation on the cluster effect of an array of axial flow fans for air-cooled condensers in a power plant

Rotational speed adjustment of axial flow fans to maximize net power output for direct dry cooling power generating units

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