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.
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Measurement of Air Parameters and Analysis of Condensation Issues within Water and Electricity Information Cabin of a Utility Tunnel during the Summer

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第16期 Page: 53-59 Column: Date of publication: 2025-08-17
Author(s):
TAI　Chuan-min1;  LEI　Wen-jun1;  XU　Ying2;  WANG　Jian-wei3;  TIAN　Guan-san1
（1. Department of Thermal Engineering， Shandong Jianzhu University， Jinan 250101， China； 2. School of Municipal and Environmental Engineering， Shandong Jianzhu University， Jinan 250101， China； 3. Construction Bureau of Taibai Lake New Area in Jining， Jining 272002， China）
Keywords:
utility tunnel;  water and electricity information cabin;  environmental parameters;  field tests;  surface temperature;  condensation
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.
Last Update: 2025-08-17