动车检查库不同通风系统降温效果对比研究
Comparative study on cooling effect of different ventilation systems in electric multiple unit inspection workshop
摘要：
基于实测数据开展了不同通风系统对夏热冬冷地区动车检查库降温效果的对比研究。结果表明:屋顶机械排风系统设计换气次数宜为2～4 h-1;直接蒸发冷却送风系统换气次数宜为3～4 h-1;诱导通风系统推荐采用中部送风、两侧排风的系统形式,机械送排风换气次数宜为2 h-1;各通风方案在推荐设计值下都能满足湿球黑球温度限值30 ℃的舒适性要求;综合对比各方案,机械排风系统造价最低,诱导通风系统效果最好,蒸发冷却送风系统适合于改善局部热环境。
Abstract：
This paper carries out a comparative study on the cooling effect of different ventilation systems in electric multiple unit (EMU) inspection workshop in hot summer and cold winter zone based on the measured data. The results show that the design air change rate of the roof mechanical exhaust system should be 2-4 h-1. The air change rate of the direct evaporative cooling air supply system should be 3-4 h-1. The induction ventilation system is recommended to use the system form of air supply in the middle and exhaust on both sides, and the air change rate of mechanical air supply and exhaust should be 2 h-1. Each ventilation scheme can meet the comfort requirement of wet bulb globe temperature (WBGT) limit of 30 ℃ under the recommended design value. Through comprehensive comparison of the schemes, the mechanical exhaust system has the lowest cost, the induction ventilation system has the best effect, and the evaporative cooling air supply system is suitable for improving the local thermal environment.
Keywords:EMU inspection workshop; thermal pressure ventilation; mechanical exhaust; direct evaporative cooling; induction ventilation; cooling effect