Research Article Open Access

A NOVEL PRESSURIZED ZONAL MODEL USING THE MOMENTUM EQUATION

Yao Yu1 and Ahmed Cherif Megri1
  • 1 North Carolina A and T State University, USA
American Journal of Engineering and Applied Sciences
Volume 7 No. 1, 2014, 77-87

DOI: https://doi.org/10.3844/ajeassp.2014.77.87

Submitted On: 31 January 2014 Published On: 25 March 2014

How to Cite: Yu, Y. & Megri, A. C. (2014). A NOVEL PRESSURIZED ZONAL MODEL USING THE MOMENTUM EQUATION. American Journal of Engineering and Applied Sciences, 7(1), 77-87. https://doi.org/10.3844/ajeassp.2014.77.87

Abstract

Zonal models combine the simplicity of single and multi-zone models with the comprehensiveness of Computational Fluid Dynamics (CFD) models and thus become a better substitute to predict detailed thermal and airflow behaviors in building. Based on a geometric partitioning of a room into a number of subzones, these models give more accurate and detailed results than the single or multi-zone modeling approaches and use less computer resource than CFD models. Nevertheless, most of the zonal models have to face a difficulty involving the limits of the simplification that need to be considered without losing accuracy and comprehensiveness. A new zonal model, called Pressurized zOnal Model using the Momentum Equation (POMME), has been developed, in which a simplified numerical model, representing various heat and mass transfer conservation equations is used. The program solver is similar to those used for CFD programs and is based on the finite-volume numerical techniques, the staggered grid formulation, the Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithm and other methods. The validation of this new zonal model has been accomplished by comparing its results with those obtained from the CFD software: PHOENICS. The results demonstrate not only the strength of the zonal model POMME in predicting the indoor airflow and thermal conditions, without the involvement of additional sub-models, but also its ability to provide relatively accurate results for building enclosures.

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Keywords

  • Zonal Model
  • CFD
  • Jet Flow Model
  • Fluid Dynamics