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

Valentín, David; Guardo, Alfredo; Valero, Carme; Alavedra, Pere

doi:10.3390/en6105069

Cited by 8 publications

(7 citation statements)

References 17 publications

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“…The standard k-epsilon (k-e) turbulence model which is frequently used for incompressible flows, was used to define the turbulence kinetic energy and flow dissipation rate within the model [29]. The use of the standard k-e transport model on building configurations has been found accurate in previous works on natural ventilation studies [2][3][4][5][30][31][32][33][34]. The governing equations for the mass conservation, momentum conservation, energy conservation, turbulence kinetic energy and dissipation rate are not included here but fully available in the FLUENT user guide [35].…”

Section: Computational Modellingmentioning

confidence: 99%

Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

2016

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For centuries, dome roofs were used in traditional houses in hot regions such as the Middle East and Mediterranean basin due to its thermal advantages, structural benefits and availability of construction materials. This article presents the computational modelling of the wind-and buoyancy-induced ventilation in a geodesic dome building in a hot climate. The airflow and temperature distributions and ventilation flow rates were predicted using Computational Fluid Dynamics (CFD). The three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations were solved using the CFD tool ANSYS FLUENT15. The standard k-epsilon was used as turbulence model. The modelling was verified using grid sensitivity and flux balance analysis. In order to validate the modelling method used in the current study, additional simulation of a similar domed-roof building was conducted for comparison. For wind-induced ventilation, the dome building was modelled with upper roof vents. For buoyancy-induced ventilation, the geometry was modelled with roof vents and also with two windows open in the lower level. The results showed that using the upper roof openings as a natural ventilation strategy during winter periods is advantageous and could reduce the indoor temperature and also introduce fresh air. The results also revealed that natural ventilation using roof vents cannot satisfy thermal requirements during hot summer periods and complementary cooling solutions should be considered. The analysis showed that buoyancy-induced ventilation model can still generate air movement inside the building during periods with no or very low wind.

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Section: Computational Modellingmentioning

confidence: 99%

Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

2016

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“…[32][33][34][35][36][37][38][39][40]. As the first round is a brainstorming round, the questionnaire was designed to give the respondents (experts) the opportunity to add more techniques and strategies for Saudi Arabian context not already covered by the questionnaire.…”

Section: Data Collection-delphi Questionnaire Descriptionmentioning

confidence: 99%

Consensus-based low carbon domestic design framework for sustainable homes

Aldossary

Rezgui

Kwan

2015

Renewable and Sustainable Energy Reviews

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“…The effect of cooling by blowing air through the channel (between the inner and outer glasses) was analyzed by Perez-Grande et al [7]. Valetin et al [9] conducted an economic assessment of a fan and nozzle-ventilated system for forced ventilation in the air gap for a double skin façade.…”

Section: Façade Types and Characteristicsmentioning

confidence: 99%

Effect of Existing Façade’s Construction and Orientation on the Performance of Low-E-Based Retrofit Double Glazing in Tropical Climate

2020

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This paper investigates the effect of an existing façade’s construction (viz. clear/grey/solar film, with and without external shade) and orientation on the performance of low-e (hard coat)-based retrofit double glazing in a tropical climate. The performance of double-glazed façades is characterized by the ability to reduce solar heat gain and the consequent reduction in power consumption of air-conditioning systems. This study involves a real-life test-bedding of a low-e (hard coat)-based retrofit double-glazing façade for a few specific cases—clear glass southeast façade without shade, clear glass southwest façade with external shade, and northwest façade with solar film and external shade. Subsequently, energy modelling simulations were done to analyze other scenarios involving various combinations of façade orientation (north, south, west, and east) and façade material (clear glass, tinted grey glass, clear glass with solar film) with and without external sunshades. The east/west-facing façades had a higher impact on the retrofit solution, and more so when the existing façade was of tinted glass or with solar film. For the case analyzed, with a window-to-wall ratio of 8% (based on overall building envelope), a grey tinted east-facing façade could benefit from annual average HVAC energy savings of up to 5.9%.

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

Cited by 8 publications

References 17 publications

Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

Computational Analysis of Natural Ventilation Flows in Geodesic Dome Building in Hot Climates

Consensus-based low carbon domestic design framework for sustainable homes

Effect of Existing Façade’s Construction and Orientation on the Performance of Low-E-Based Retrofit Double Glazing in Tropical Climate

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