隧道热害环境下电力机车蓄冷式冷却塔散热性能研究
Heat dissipation performance study of electric locomotive storage cooling tower under tunnel heat damage environment
曹小林 1易柯 2罗开宝 1饶政华 1凌晨 1彭村越1
作者信息
- 1. 中南大学能源科学与工程学院,湖南长沙,410083
- 2. 重载快捷大功率电力机车国家重点实验室,中车株洲电力机车有限公司,湖南株洲,412001
- 折叠
摘要
针对西部某铁路所处的高原隧道热害环境,提出一种电力机车蓄冷式冷却塔结构及其运行方案,通过对蓄冷及释冷过程进行仿真,分析换热器的冷却性能并对其结构进行优化.研究结果表明:当换热器蓄冷运行时,相对于壳体两侧无翅片结构,采用壳体空气侧加翅片和壳体双侧加翅片,相变蓄冷时间从113 min分别缩短至80 min和47 min;当换热器释冷运行时,乙二醇水溶液经相变蓄冷换热器冷却,传热管道添加间距为8 mm的翅片,有效冷却时间(冷却介质出口温度低于55℃)从无翅片结构的1.5 min延长至16 min,超过设计要求的14 min,有效解决了机车冷却塔的散热难题.
Abstract
Inview of the heat damage environment in plateau tunnels along a railway in western China,a phase change cold storage cooling tower and its operation scheme for electric locomotive were proposed.Cold-storage and cold-release processes of this cooling tower were simulated,its cooling performance was analyzed and the structure of the heat exchanger was optimized.The results show that when the heat exchanger is running for cold storage,compared with the finless structure,the phase change cold-storage time of the structure with fins on the air side and the structure with fins on the both sides of the shell is shortened from 113 min to 80 min and 47 min,respectively.When the heat exchanger is running for cold-release,the cooling medium(ethylene glycol aqueous solution)is cooled by the phase change cold storage heat exchanger and the effective cooling time(while the outlet temperature of the cooling medium is less than 55℃)of the structure with 8 mm spacing fins on the heat transfer pipeline is extended from 1.5 min(for the finless structure)to 16 min,exceeding the designed requirements(14 min),which solves the heat dissipation problem of locomotive cooling tower.
关键词
隧道热害/散热/相变蓄冷/仿真Key words
tunnel heat damage/heat dissipation/phase change cold-storage/simulation引用本文复制引用
基金项目
湖南省自然科学基金(2020JJ4722)
重载快捷大功率电力机车全国重点实验室开放基金(13121430001290)
出版年
2024
国家科技期刊平台
NSTL
万方数据