Performance Trends of an Air-Cooled Steam Condenser Under Windy Conditions
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TLDR
In this paper, the authors modeled the air flow field about and through a particular air-cooled steam condensers with the aid of a novel numerical approach known as the "actuator disc model".Abstract:
Air-cooled steam condensers (ACSCs) are increasingly employed to reject heat in modern power plants. Unfortunately, these cooling systems become less effective under windy conditions and when ambient temperatures are high. A better understanding of the fundamental air flow patterns about and through such ACSCs is essential if their performance is to be improved under these conditions. The present numerical study models the air flow field about and through a particular ACSC. The performance of the fans is modeled with the aid of a novel numerical approach known as the “actuator disc model.” Distorted air flow patterns that significantly reduce fan performance in certain areas and recirculatory flows that entrain hot plume air are found to be the reasons for poor ACSC performance. It is found that the reduction in fan performance is the main reason for the poor ACSC performance while recirculation of hot plume air only reduces performance by a small amount.read more
Citations
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A novel layout of air-cooled condensers to improve thermo-flow performances
TL;DR: In this paper, a vertical arrangement of air-cooled condensers is proposed on the basis of a 2 × 600 MW direct dry cooling power plant, which can weaken the adverse wind effects and utilize the wind power to improve the cooling capacity of aircooled Condensers.
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Wind effect on the thermo-flow performances and its decay characteristics for air-cooled condensers in a power plant
Lijun Yang,Xiaoze Du,Yan-Ru Yang +2 more
TL;DR: In this paper, the physical and mathematical models of air-side fluid and heat flows for the air-cooled condensers at various ambient wind speeds and directions are set up.
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Space characteristics of the thermal performance for air-cooled condensers at ambient winds
Lijun Yang,Xiaoze Du,Yan-Ru Yang +2 more
TL;DR: In this article, the authors investigate the impacts of the ambient winds on the air-cooled condensers in a power plant and obtain the volumetric flow rate, inlet air temperature, and heat rejection for different aircooled cells and fin-tube bundles using CFD simulation.
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Influences of wind-break wall configurations upon flow and heat transfer characteristics of air-cooled condensers in a power plant
Lijun Yang,Xiaoze Du,Yan-Ru Yang +2 more
TL;DR: In this article, the effects of wind-break wall configurations on the thermo-flow performances of air-cooled condensers were investigated in a 2 × 600 MW direct dry cooling power plant.
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Performance prediction of an improved air-cooled steam condenser with deflector under strong wind
TL;DR: In this article, a new method is proposed to remove the strong wind effect by adding deflecting plates under the air-cooled platform, which contributes to forming a uniform air mass flow rate in the axial fans by leading enough cooling air to the fans in the upwind region.
References
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Journal ArticleDOI
Numerical investigation of fan performance in a forced draft air-cooled steam condenser
TL;DR: In this article, the effect of inlet flow distortions on the flow rate through the fans in an ACSC is numerically investigated by modelling the flow field in a section of such a system using the computational fluid dynamics code, FLUENT.
Journal ArticleDOI
The influence of wind on the performance of forced draught air-cooled heat exchangers
K. Duvenhage,D.G. Kröger +1 more
TL;DR: In this paper, the influence of wind on fan performance and recirculation in a forced draught air-cooled heat exchanger (ACHE) bank is investigated numerically.
Journal ArticleDOI
Effect of inlet flow distortions on fan performance in forced draught air-cooled heat exchangers
C.A. Salta,D.G. Kröger +1 more
TL;DR: In this paper, the reduction of the air flow rate through ACHE models having different numbers of fan rows is investigated experimentally and the results are correlated by an empirical relation which can be applied to the design of ACHEs.
Journal ArticleDOI
Numerical investigation of the effect of inlet flow distortions on forced draught air-cooled heat exchanger performance
TL;DR: In this article, a numerical resolution of flow fields associated with systems comprising a single and two banks of ACHEs is presented. But the numerical models used accurately reflect the experimentally determined differences in inlet flow losses experienced by systems using either bellmouth, conical or cylindrical fan inlet sections.
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