摘要
利用计算流体力学软件CFD,对自然通风状态下,某电厂2×300 MW机组两机一塔的SCAL型间接空冷散热器空冷塔内外空气的流动和传热性能进行数值模拟、分析和研究。确定考核工况基准下,不同环境风速对空冷塔通风量和间接空冷散热器散热量以及机组背压的影响。模拟结果显示,随着环境风速的增加,空冷塔内外流场发生复杂变化,空冷塔通风量和散热器散热量降低,机组背压升高,将引起很大的经济损失。这为间接空冷系统空冷散热器的优化设计提供了参考。
By using computational fluid dynamics software, a series of numerical simulation, analysis and research on the flow and heat transfer performance of the air inside and outside the SCAL type indirect air -cooling tower in the 2 x 300MW unit under the natural ventilation circumstance was proceeded. Under performance assessment condition, the influence of different wind speed on the air flow rate of the tower, heat transfer rate of the indirect air cooled radiator and the unit back pressure is determined. The s.imulation results show that as the environment wind speeds grow, the flow field inside and outside the tower changes complexly, and the air flow rate of the tower and the heat flux of the radiator decreases thus the unit back pressure rises, which would cause great economic loss. The present studies are of use in optimal designing for the air -cooled heat exchangers of indirect dry cooling system.
出处
《应用能源技术》
2013年第11期37-41,共5页
Applied Energy Technology
关键词
间接空冷散热器
空冷塔
CFD
流动传热性能
背压
Indirect air- cooled radiator
Air cooling tower
CFD
Flow and heat transfer charac-teristics
Back pressure
