Validation of numerical modeling of conditions in an atrium space with a hybrid ventilation system

Abstract Quite extensive measurements undertaken in a three-story atrium space (floors 14th–16th) with a hybrid solar-assisted natural ventilation system in the Engineering building of the Concordia University, Montreal, Canada have recently become available. The thermal conditions of the atrium space have been studied numerically using the Reynolds Averaged Navier-Stokes (RANS) modeling approach. The RANS turbulence models that were tested include the standard k-e, RNG k-e, ‘realizable’ k-e, and SST k-ω turbulence models. The radiation exchange between the surfaces of the atrium space was considered using the Discrete Transfer Radiation Model (DTRM). The resultant steady state governing equations were solved using a commercial CFD solver FLUENT. Numerical results were obtained for the conditions existing when measurements were taken in the Concordia atrium on typical clear days with the blinds fully open or fully closed and with the natural ventilation system (NV) ON or OFF. The CFD model predictions were validated by the comparison against the experimental measurements available and it was found that the numerical predictions implying CFD model agree well with the measurements.

[1]  Wan Ki Chow,et al.  Application of Computational Fluid Dynamics in building services engineering , 1996 .

[2]  Qingyan Chen,et al.  Prediction of room air motion by Reynolds-stress models , 1996 .

[3]  Maria Kolokotroni,et al.  Dynamic thermal CFD simulation of a typical office by efficient transient solution methods , 2005 .

[4]  Qingyan Chen,et al.  Experimental and numerical analysis of heat transfer and airflow on an interactive building facade , 2010 .

[5]  Eduard Egusquiza,et al.  Performance and influence of numerical sub-models on the CFD simulation of free and forced convection in double-glazed ventilated façades , 2008 .

[6]  Maria K. Koukou,et al.  Natural cross-ventilation in buildings: Building-scale experiments, numerical simulation and thermal comfort evaluation , 2008 .

[7]  Anastasios I. Stamou,et al.  Verification of a CFD model for indoor airflow and heat transfer , 2006 .

[8]  Guohui Gan.  Simulation of buoyancy-induced flow in open cavities for natural ventilation , 2006 .

[9]  Eleni Mouriki,et al.  Solar-assisted hybrid ventilation in an institutional building , 2009 .

[10]  F. Carrié,et al.  Thermal and ventilation modelling of large highly-glazed spaces , 2001 .

[11]  Qingyan Chen.  COMPARISON OF DIFFERENT k-ε MODELS FOR INDOOR AIR FLOW COMPUTATIONS , 1995 .

[12]  D. Wilcox.  Reassessment of the scale-determining equation for advanced turbulence models , 1988 .

[13]  Eduard Egusquiza,et al.  A CFD approach to evaluate the influence of construction and operation parameters on the performance of Active Transparent Façades in Mediterranean climates , 2009 .

[14]  Zhiqiang Zhai,et al.  Numerical investigation on thermal performance and correlations of double skin façade with buoyancy-driven airflow , 2008 .

[15]  Morad R. Atif,et al.  Comparison between computed and field measured thermal parameters in an atrium building , 1998 .

[16]  Xin Wang,et al.  Mathematical modeling and experimental study on vertical temperature distribution of hybrid ventilation in an atrium building , 2009 .

[17]  Anne Sergent,et al.  Experimental and numerical investigation of turbulent natural convection in a large air-filled cavity , 2004 .

[18]  S. Orszag,et al.  Renormalization group analysis of turbulence. I. Basic theory , 1986 .

[19]  A. E. Holdø,et al.  An experimental study of stratified flow in enclosures , 2008 .

[20]  Bahram Moshfegh,et al.  Numerical predictions of indoor climate in large industrial premises. A comparison between different k–ε models supported by field measurements , 2007 .

[21]  Panagiota Karava,et al.  Validation of computational fluid dynamics simulations for atria geometries , 2011 .

[22]  Zhiqiang Zhai,et al.  Application of Computational Fluid Dynamics in Building Design: Aspects and Trends , 2006 .

[23]  P. J. Jones,et al.  Computational fluid dynamics for building air flow prediction—current status and capabilities , 1992 .

[24]  Murat Nihat Basarir,et al.  Numerical Study of the Airflow and Temperature Distributions in an Atrium , 2009 .

[25]  J. Palyvos.  A survey of wind convection coefficient correlations for building envelope energy systems’ modeling , 2008 .

[26]  F. Menter.  Two-equation eddy-viscosity turbulence models for engineering applications , 1994 .

[27]  M.N.A. Saïd,et al.  Measurement of thermal stratification in large single-cell buildings , 1996 .

[28]  W. H. Leong,et al.  Effectiveness of several turbulence models in natural convection , 2004 .

[29]  V. Serra,et al.  Experimental evaluation of a climate façade: Energy efficiency and thermal comfort performance , 2010 .