超长电力电缆隧道冬季温度分布特征及通风节能潜力
Winter temperature distribution characteristics and energy saving potential of ventilation in extra-long power cable tunnels
周嘉怡 1王亮 2成瑾 1钟珂 1亢燕铭1
作者信息
- 1. 东华大学 环境科学与工程学院,上海
- 2. 上海市隧道工程轨道交通设计研究院,上海
- 折叠
摘要
为了解冬季通风时隧道内的换热情况和节能潜力,对冬季室外气温为 4～12℃时超长通风区间特高压电力隧道内的温度分布特征进行数值模拟研究.采用 ANSYS Fluent 19.2 软件,通过用户自定义程序完成电力隧道全长的模拟.对冬季隧道的传热特征和通风节能潜力进行分析,定义并给出了冬季能实现最大节能效果的临界通风量.结果表明:具有超长通风区间的电力隧道存在通过降低通风量从而实现节能的潜力;冬季电力隧道前段土壤放热、后段土壤吸热,土壤放热量占比受室外气温影响,而土壤吸热量占比受室外空气温度和通风量影响;冬季室外气温越低,临界通风量越小,通风节能潜力越大,当冬季室外气温为 4～12℃时,最大可能节能率为 91%.
Abstract
To obtain the heat exchange situation and energy saving potential in the tunnel during winter ventilation,a numerical simulation study was conducted to investigate the temperature distribution characteristics in the extra-high voltage power tunnel with extra-long ventilation interval when the outdoor air temperature is from 4℃to 12℃in winter.The user-defined programs of ANSYS Fluent 19.2 software were used to complete the simulation of the entire length of the power tunnel.The heat transfer characteristics of the tunnel in winter and the potential for energy saving in ventilation were analyzed,and the critical ventilation volume that can achieve the maximum energy saving effect in winter was defined and given.The results show that the power tunnel with extra-long ventilation interval has a potential to reduce the ventilation volume and thus realize energy saving.The soil is exothermic in the front section of power tunnels and endothermic in the back section in winter.Soil heat release is affected by outdoor air temperature,while soil heat absorption is affected by the outdoor air temperature and the ventilation volume.The lower the outdoor temperature in winter,the smaller the critical ventilation volume,and the greater the potential for ventilation energy saving.When the outdoor temperature is from 4℃to 12℃in winter,the maximum possible energy saving rate is 91%.
关键词
电力电缆隧道/超长通风区间/温度分布/节能潜力/数值模拟/传热特征/冬季Key words
power cable tunnel/extra-long ventilation interval/temperature distribution/energy saving potential/numerical simulation/heat transfer characteristics/winter引用本文复制引用
出版年
2024
NETL
NSTL
万方数据