北京交通大学学报2017，Vol.41Issue(4)：70-76,7.DOI:10.11860/j.issn.1673-0291.2017.04.010
钢塔对间冷散热器换热性能的影响
Influence of steel tower on the heat transfer characteristics of indirect air cooled radiator
摘要
Abstract
By using the numerical heat transfer software FLUENT,the flow and thermal characteristics of the first 2 × 660 MW units indirect air cooled radiator(IACR) in China is numerically simulated,analyzed and studied under natural draft,whose steel-structured air cooling tower is coated with aluminum sheet.Under the performance assessment working condition set in this paper,the difference value of the heat transfer amount of IACR and ventilation volume of steel tower between units with and without horizontal stiffening rings takes up about 2.7％ of the designed heat transfer amount.The heat transfer amount of aluminum plates takes up about 0.6 ％ of the power units' heat rejection amount.The driving force of steel tower decreases as wind speed increases.Hot air in steel tower flow out through cooling column as wind speed is greater than 10m/s.Wind gust through the tower appears as wind speed is greater than 20m/s,and the heat transfer amount of IACR and ventilation volume of steel tower apparently increase.When environmental wind speed is less than 12m/s,heat transfer amount of IACR and air flow rate of steel tower gradually decrease as wind speed increases.When environmental wind speed is greater than 12m/s,heat transfer amount of IACR and air flow rate of steel tower tend to increase as wind speed decreases.When environmental wind speed is greater than 12m/s,heat exchange rate of IACR and air flow rate of steel tower show the tendency of increase as wind speed decreases.关键词
钢塔/间接空冷散热器/数值模拟/空冷塔/自然通风/优化设计Key words
steel tower/indirect air cooled radiator/numeral simulation/air cooling tower/natural draft/optimal design分类
能源科技引用本文复制引用
石磊,王锦,薛海君,石诚..钢塔对间冷散热器换热性能的影响[J].北京交通大学学报,2017,41(4):70-76,7.基金项目
中央高校基本科研业务费专项资金(2011JBM266)Fundamental Research Funds for the Central Universities(2011JBM266) （2011JBM266）
