TAIChuan-min,LEIWen-jun,XUYing,et al.Measurement of Air Parameters and Analysis of Condensation Issues within Water and Electricity Information Cabin of a Utility Tunnel during the Summer[J].China Water & Wastewater,2025,41(16):53-59.
夏季综合管廊水信舱空气参数实测及结露问题分析
- Title:
- Measurement of Air Parameters and Analysis of Condensation Issues within Water and Electricity Information Cabin of a Utility Tunnel during the Summer
- Keywords:
- utility tunnel; water and electricity information cabin; environmental parameters; field tests; surface temperature; condensation
- 摘要:
- 综合管廊作为相对封闭的地下空间，室内空气参数的变化对管廊内管道及构件存在一定的影响。因此，掌握管廊内空气参数的变化规律非常必要。对某综合管廊水信舱一个标准通风区间内的夏季空气参数和管道表面温度进行现场测试，并对管道表面结露现象进行分析。结果表明，水信舱内CO、CO2浓度较稳定且处于规定范围内，不会危及运维人员健康；舱内平均空气流速为0.1 m/s，空气流动性较差；舱内空气温度为23.5~24.8 ℃，相对湿度保持在89.5%以上；舱内空气露点温度较高，给水和中水管道表面均存在结露。为防止结露，给出了加强舱室通风和在管道外表面增加保温层的建议，以期为综合管廊运行维护和相关设计规范修订提供数据支撑。
- Abstract:
- As a relatively enclosed underground space, variations in indoor air parameters impact the pipes and components inside utility tunnels. Therefore, mastering the variation in air parameters inside utility tunnels is necessary. Field tests were conducted on both the air parameters and surface temperatures of the pipelines during standard ventilation interval in a water and electricity information cabin of the utility tunnel in summer, and the phenomenon of condensation on the pipeline surface was analyzed. The results show that CO and CO2 concentrations in the cabin were stable and all within the acceptable range, which will not endanger the health of maintainers. The air circulation within the cabin is poor, with an average air velocity of only 0.1 m/s. The air temperature in the cabin varies between 23.5 and 24.8 ℃, and the relative humidity remains above 89.5%. The dew point temperature of the air inside the cabin is relatively high, leading to condensation on the surfaces of the water supply and reclaimed water pipelines. Suggestions are given to strengthen the ventilation of the cabin and to add an insulation layer on the outer surface of the pipe to prevent condensation. The results of this study are expected to provide data support for the operation and maintenance of utility tunnels and for the revision of relevant design specifications.
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