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A network model for natural ventilation simulation in deep buried underground structures

机译：深埋地下结构自然通风模拟的网络模型

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摘要

The study of underground natural ventilation opportunities has become increasingly significant in recent years with its promise of wide application in underground structures such as underground hydro power stations, metro stations, underground parking and laboratories. It is recognized that deployment of natural ventilation constitutes a passive technology that can lead to significant energy conservation if applied judiciously. This paper focuses on underground buildings that are buried deeply and typically consist of an underground complex network of connected structures. The other characteristic is that these structures house machinery and devices that generate heat, leading to elevated internal air temperatures. Combined with the deep location, it implies that buoyancy forces are significant which make natural ventilation through vertical shaft openings a viable option. These characteristics demand a study of the heat transfer processes between ambient conditions, soil and underground buildings. In this paper, we present a dynamic flow network model with loops for multizone airflow and apply it to deep buried underground structures considering the dominant heat transfer characteristics, not only through the elements of the network but also the heat exchange with the envelope and adjacent soil mass. Finally, a small-scale experiment of occurring airflow is conducted and compared with the outcomes of the dynamic simulation of the proposed model. The comparison serves as validation and illustration of the application potential of the network model for natural ventilation investigation and consecutive optimization of its use in underground buildings.
机译：近年来，对地下自然通风机会的研究变得越来越重要，因为它有望在地下结构中广泛应用，例如地下水力发电站，地铁站，地下停车场和实验室。公认的是，自然通风的部署构成了一种被动技术，如果明智地应用，它可以显着节约能源。本文关注的是深埋的地下建筑，通常由连接结构的地下复杂网络组成。另一个特征是这些结构容纳产生热量的机械和设备，从而导致内部空气温度升高。结合深处，这意味着浮力很大，这使得通过垂直竖井孔进行自然通风成为可行的选择。这些特性要求研究环境条件，土壤与地下建筑物之间的传热过程。在本文中，我们提出了一种具有多区域气流环流的动态流网络模型，并考虑到主要的传热特性，将其应用于深埋地下结构，不仅通过网络的要素，而且还通过包络和邻近土壤进行热交换质量最后，进行了发生气流的小规模实验，并将其与所提出模型的动态仿真结果进行了比较。比较结果可以验证和说明网络模型在自然通风调查中的应用潜力，并可以对其在地下建筑中的使用进行连续优化。

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  • 来源
    《Building and Environment》 |2019年第4期|288-301|共14页
  • 作者

    Liu Yanan; Xiao Yimin; Chen Jianli; Augenbroe Godfried; Zhou Tiecheng;

  • 作者单位

    Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Chongqing 400045, Peoples R China|Georgia Inst Technol, Sch Architecture, Atlanta, GA 30332 USA;

    Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Chongqing 400045, Peoples R China|Chongqing Univ, Natl Ctr Int Res Low Carbon & Green Bldg, Chongqing 400045, Peoples R China;

    Natl Renewable Energy Lab, Golden, CO USA;

    Georgia Inst Technol, Sch Architecture, Atlanta, GA 30332 USA;

    Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Minist Educ, Chongqing 400045, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Network model; Heat transfer; Natural ventilation; Underground buildings;

    机译：网络模型;传热;自然通风;地下建筑;

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