摘要
闭式水冷却系统在冬季常换用乙二醇水溶液作为防冻的循环工质,由于物性变化,其携热能力和对流换热系数比水都有所下降。本文基于闭塔设计理论,研究了不同浓度的乙二醇水溶液作为闭式冷却塔循环工质在不同季节中对换热的综合影响,提出了采用大管径薄壁管和加大循环工质流量及增加相应通风量等应对方法,并揭示了其在不同运行模式下的变化规律。
In the winter, ethylene glycol solution usually used in the closed cooling system instead of water as the antifreeze. Due to the changes in physical properties, its heat carrying capacity and convective heat transfer coefficient has declined. Based on the theory of closed-tower design, we studied the influence of the heat transfer different concentrations and different seasons to the Ethylene Glycol solution used in the closed cooling tower circulation; supposed that use a large diameter-thin walled tube, increase the flow rate of Ethylene Glycol solution cycle working fluid or increase the amount of ventilation rate, and reveals the variation in the different operating modes.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2013年第2期90-93,共4页
Fiber Reinforced Plastics/Composites
基金
科技部中小企业创新基金重点项目(10C26213304189)
上海市大学生创新基金(SH1110252005)
关键词
闭式冷却塔
乙二醇水溶液
传热系数
closed cooling tower
ethylene glycol solution
heat transfer coefficient
