Performance and influence of numerical sub-models on the CFD simulation of free and forced convection in double-glazed ventilated façades

Coussirat, Miguel G.; Guardo, Alfredo; Jou, Esteve; Egusquiza, Eduard; Cuerva, Eva; Alavedra, Pere

doi:10.1016/j.enbuild.2008.03.009

Cited by 84 publications

(54 citation statements)

References 23 publications

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“…Computational fluid dynamics (CFD) has been validated as a numerical simulation tool in the study of DSF by several authors for natural and mechanical ventilation scenarios without shading devices [15][16][17][18]. The good agreement between numerical and experimental results reported by all authors cited demonstrates the viability of CFD to study the thermal performance of a DSF.…”

Section: Introductionmentioning

confidence: 73%

“…The good agreement between numerical and experimental results reported by all authors cited demonstrates the viability of CFD to study the thermal performance of a DSF. Previous work from this research group [3,[18][19][20][21] presented numerical simulations of a story-high DSF located in Barcelona (Spain) and evaluated the influence of construction and operation parameters as well as the ventilation method in the thermal performance of the façade. Several ventilation and injection methods were analyzed, and upper-crossed horizontal ventilation using Coandă nozzle injectors was found to be an interesting ventilation option because of its good compromise between solar heat gain reductions, flow rate injection and overall costs.…”

Section: Introductionmentioning

confidence: 99%

“…Results were obtained by means of a commercial CFD solver (Ansys Fluent ® v15). Numerical models, meshing and modeling strategy used were validated against an open literature experimental database in previous work [18]. The parametric study presented show the effects of VB louvers surface treatments, VB position and ventilation flow rate on cavity temperatures and heat gains.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds

et al. 2015

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Venetian blinds (VB) are shading devices of widespread use in residential and corporate buildings. They can reflect or transmit light into buildings and at the same time allow daylighting and exterior views. They can also efficiently block radiative heat from entering the building, and if combined with a heat dissipation system such as forced ventilation, they can improve the thermal performance of double skin façades (DSF). Computational Fluid Dynamics (CFD) has proven to be a useful tool for modeling flow and heat transfer in DSF, including conduction, convection and radiation heat transfer phenomena. The aim of this work is to evaluate, by means of CFD, the influence of several optical, construction and operation parameters of a DSF (such as optical properties of the materials, geometrical relations of the VB or flow stream conditions) in terms of energy savings, measured as a reduction of the solar load entering the building. Results obtained show that parameters such as the proximity of the VB to the exterior skin of the façade or a differentiated surface treatment for the exterior and interior faces of the VB louvers can notably affect the thermal performance of the DSF and hence the heat gains experienced by the building.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds

et al. 2015

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“…The good agreement with the experimental results demonstrated the viability of CFD to study the thermal performance of a DGF. Guardo et al [7,11,12] performed simulations of a storey-high DGF in Mediterranean climates and they evaluate the influence of construction an operation parameters of a DGF, as well as the optimal DGF forced ventilation methods. Several ventilation methods were analyzed, such as vertical ventilation, horizontal homogeneous ventilation, upper and lower crossed lateral ventilation and swirling flow ventilation.…”

Section: Introductionmentioning

confidence: 99%

“…Numerical data used in this study have been obtained by this research group [7,[11][12][13] by means of CFD. The DGF geometry and mesh model were situated in Barcelona and upper crossed lateral ventilation (horizontal ventilation) were defined as the optimal mechanical ventilation system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates

Valentín

Guardo

Valero³

et al. 2013

Energies

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Free convection is the most often used method in order to reduce solar load gains on a building with double glazed façades (DGFs). However, depending on the climate factors, the thermal performance of a DGF may not be satisfactory and extra energy costs are required to obtain suitable comfort conditions inside the building. Forced ventilation systems are a feasible alternative to improve the thermal performance of a DGF in Mediterranean climates where large solar gains are a permanent condition throughout the year. In this paper the feasibility of using diverse forced ventilation methods in DGF is evaluated. In addition, an economical comparison between different mechanical ventilation systems was performed in order to demonstrate the viability of DGF forced ventilation. Moreover, an environmental study was carried out to prove the positive energetic balance on cooling loads between free and forced convection in DGF for Mediterranean climates. For this investigation, a CFD model was used to simulate the thermal conditions in a DGF for the different ventilation systems. Results obtained for heat flux, temperature and reductions in solar load gains were analyzed and applied for the economic and environmental research.

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Assessing cooling energy reduction potentials by retrofitting traditional cavity walls into passively ventilated cavity walls

Shen

2020

Build. Simul.

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Performance and influence of numerical sub-models on the CFD simulation of free and forced convection in double-glazed ventilated façades

Cited by 84 publications

References 23 publications

Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds

Thermal Performance of Ventilated Double Skin Façades with Venetian Blinds

Assessment of the Economic and Environmental Impact of Double Glazed Façade Ventilation Systems in Mediterranean Climates

Assessing cooling energy reduction potentials by retrofitting traditional cavity walls into passively ventilated cavity walls

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