In large single-cell buildings, a multi-layer analytical model of natural ventilation is presented in this paper. The fluid mechanics of a plume developing in multi-layer environment is investigated based on the plume theory. Using the basic equations for a thermal plume, a mathematical model demonstrating this mechanics is established. Multi-layer thermal stratification of air density or temperature is considered driven by heat flux along wall surfaces. Airflow along vertical walls is modeled with two separate methods, one considering separate wall plumes for each layer and another modeling continuous airflow along the whole wall surface. A multi-layer model is established through balance equations for mass flow rate and heat in each layer. Two separate multi-layer models are presented and then are used to predict the ventilation flow rate and vertical temperature profiles. CFD simulation is also carried out using the RNG κ-ε model, together with an enhanced wall boundary treatment. Results of both present models are compared with those of CFD simulation. Comparisons of the results show that one model using turbulent boundary layer to calculate continuous airflow along vertical walls gives more reasonable and reliable predictions than the other one.
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ASME 2005 International Solar Energy Conference
August 6–12, 2005
Orlando, Florida, USA
Conference Sponsors:
- Solar Energy Division
ISBN:
0-7918-4737-3
PROCEEDINGS PAPER
Study on a Multi-Layer Analytical Model of Natural Ventilation in Large Single-Cell Buildings
Jun Gao,
Jun Gao
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Jia-Ning Zhao,
Jia-Ning Zhao
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Fu-Sheng Gao,
Fu-Sheng Gao
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Jing Liu,
Jing Liu
Harbin Institute of Technology, Harbin, Heilongjiang, China
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Zhao-Jun Wang
Zhao-Jun Wang
Harbin Institute of Technology, Harbin, Heilongjiang, China
Search for other works by this author on:
Jun Gao
Harbin Institute of Technology, Harbin, Heilongjiang, China
Jia-Ning Zhao
Harbin Institute of Technology, Harbin, Heilongjiang, China
Fu-Sheng Gao
Harbin Institute of Technology, Harbin, Heilongjiang, China
Jing Liu
Harbin Institute of Technology, Harbin, Heilongjiang, China
Zhao-Jun Wang
Harbin Institute of Technology, Harbin, Heilongjiang, China
Paper No:
ISEC2005-76139, pp. 89-96; 8 pages
Published Online:
October 15, 2008
Citation
Gao, J, Zhao, J, Gao, F, Liu, J, & Wang, Z. "Study on a Multi-Layer Analytical Model of Natural Ventilation in Large Single-Cell Buildings." Proceedings of the ASME 2005 International Solar Energy Conference. Solar Energy. Orlando, Florida, USA. August 6–12, 2005. pp. 89-96. ASME. https://doi.org/10.1115/ISEC2005-76139
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