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

Journal Article · · Building and Environment
 [1];  [2];  [3];  [4];  [2]
  1. Chongqing Univ. (China); Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Chongqing Univ. (China)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  4. Georgia Inst. of Technology, Atlanta, GA (United States)

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.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
National Science Foundation of China
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1507681
Report Number(s):
NREL/JA--5500-73672
Journal Information:
Building and Environment, Journal Name: Building and Environment Journal Issue: C Vol. 153; ISSN 0360-1323
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Simulation Study on the Dynamic Ventilation Control of Single Head Roadway in High-Altitude Mine Based on Thermal Comfort journal July 2019

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