铁路站房高大空间渗风量与温度梯度测试研究
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摘要
针对夏热冬冷地区铁路旅客站房冬季渗透风及热分层问题,以武汉某铁路站房为调研对象,对候车区高大空间开口尺寸,渗透风量和温度分布进行实地调研。结果表明,调研时段站房总渗透风量达到61.2万m~3/h,折合换气次数为2.1次/h,其中高架候车室渗透风量为54.7万m~3/h,折合换气次数为2.0次/h,整个站房单位空调面积渗透风热负荷为68.5 W/m~2。高大空间下部候车区温度为15.0℃,顶部温度为20.0℃,上下温差为5℃,温度梯度下部较高,上部平缓,平均约为0.28℃/m。调研结果为站房运行节能提供了技术参考。
Aiming at the problem of air infiltration and heat stratification in the railway passenger station in the hot-summer and cold-winter region, a railway station in Wuhan is taken as the research object, and the on-site investigation about the opening size, infiltration air volume and temperature distribution of the waiting hall large space is conducted. The results indicate that during the survey period, the total infiltration air volume of the station reaches612000 m3/h, which is equivalent to air change rate of 2.1 times per hour. And the infiltration air volume of elevated waiting hall is 547000 m~3/h, which is equivalent to air change rate of 2.0 times per hour. The infiltration air heating load of per unit air-conditioning area of the whole station is 68.5 W/m~2. The temperature of the lower part of the large space is 15.0 ℃,while that of the upper part is 20.0 ℃, and the temperature difference between the upper and the lower parts is 5℃.The temperature gradient of the lower part is higher, while the upper is gentle, and the average is about 0.28 ℃/m. The results of the investigation provide technical reference for the energy saving operation of the station.
Aiming at the problem of air infiltration and heat stratification in the railway passenger station in the hot-summer and cold-winter region, a railway station in Wuhan is taken as the research object, and the on-site investigation about the opening size, infiltration air volume and temperature distribution of the waiting hall large space is conducted. The results indicate that during the survey period, the total infiltration air volume of the station reaches612000 m3/h, which is equivalent to air change rate of 2.1 times per hour. And the infiltration air volume of elevated waiting hall is 547000 m~3/h, which is equivalent to air change rate of 2.0 times per hour. The infiltration air heating load of per unit air-conditioning area of the whole station is 68.5 W/m~2. The temperature of the lower part of the large space is 15.0 ℃,while that of the upper part is 20.0 ℃, and the temperature difference between the upper and the lower parts is 5℃.The temperature gradient of the lower part is higher, while the upper is gentle, and the average is about 0.28 ℃/m. The results of the investigation provide technical reference for the energy saving operation of the station.
引文
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