地下管廊综合舱热压自然通风效果分析

作者：李佳兴曾思景方子梁李安桂杨长青

单位：西安建筑科技大学长江勘测规划设计研究有限责任公司

摘要：针对地下管廊综合舱热压自然通风设计，基于巫山管廊综合舱建立了数值模型，模拟分析了进排风口高差和舱内电缆散热量对管廊内不同位置剖面速度和温度分布的影响。对进排风口高差、舱内热源强度、管线布置及排风口尺寸进行了优化探究。结果表明，合理的自然通风设计可以有效排除综合舱内的热量，满足正常通风要求。

关键词：热压自然通风地下管廊气流分布通风量散热量进排风口高差管线布置

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Analysis of buoyancy-driven natural ventilation effect in integrated compartment of underground utility tunnels

Li Jiaxing Zeng Sijing Fang Ziliang Li Angui Yang Changqing

(Xi'an University of Architecture and Technology Changjiang Survey Planning Design and Research Co., Ltd.)

Abstract: Aiming at the design of buoyancy-driven natural ventilation for the integrated compartment of the underground utility tunnel, a numerical model is established based on the integrated compartment of the Wushan utility tunnel, and the effects of the height difference of air inlet and exhaust outlet and the heat dissipation of cables in the cabin on the profile velocity and temperature distribution at different positions in the utility tunnel are simulated and analysed. The height difference of air inlet and exhaust outlet, the intensity of heat source in the cabin, the pipeline layout and the size of the exhaust outlet are optimized and explored. The results show that the reasonable natural ventilation design can effectively remove the heat in the integrated cabin and meet the normal ventilation requirements.

Keywords: buoyancy-driven natural ventilation; underground utility tunnel; air distribution; ventilation rate; heat dissipation; height difference of air inlet and exhaust outlet; pipeline layout;

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