Double skin façades - the use of venetian blinds and night ventilation for saving energy on mediterranean climate (original) (raw)
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Taking into account Mediterranean climate particularities for Barcelona, Spain, a whole year study using TAS simulation software was carried out for a Double Skin Façade corporative office building. It is a typical office building with an extended working hours schedule for acclimatization. Four different cavity widths were simulated -40cm, 60cm, 80cm, 100cm -as well as three different external opening areas for cavity's natural ventilation purpose. Two Double Skin Façade typologies were simulated -a corridor façade and a multistory façade. Simulations showed cooling loads are much greater than heating loads on a double glazed skin façade building south oriented in a Mediterranean climate town like Barcelona. Results demonstrated that a Multistory Façade, depending on its configuration, might save up to 5% on annual cooling loads respect to a Corridor Façade. Different opening areas and cavity depths shall be used for different typologies in order to obtaining good energy results.
Sustainability
Engineers use double-skin façades (DSF) to lower the energy consumption of buildings as they can potentially control incoming wind speeds and the amount of solar heat gain. The purpose of this present study was to (1) evaluate the use of DSFs, (2) its efficacy in improving the energy performance of high-rise office buildings in the hot, dry summer climate of the Mediterranean, and (3) to develop an optimum DSF model for this climate based on industry standards and recommendations for high-performance DSF parameters. In order to determine the efficiency of DSFs, two distinct variables, building orientation and the number of DSFs used, were taken into consideration. This study adopted an experimental (generate and test) research design and used Autodesk® Ecotect® Analysis software to develop computer simulations with which to assess 15 single façades, juxtaposed façades, three façades, and four façades on cardinal orientations. The recorded energy consumption and savings were then com...
This research analyzes the thermal performance of several types of Double Skin Façades [DSF] to determine which are best suited for each climate zone. The purpose of the research is to help guide project owners and unspecialized architects during their decision making process, when they choose to design a DSF. Using Building Energy Modeling [BEM] software, various types of naturally ventilated DSFs are analyzed in all seventeen ASHRAE climate zones. The thermal performance of the DSF is determined by comparing the building energy use data of a generic office building. The different types of DSFs are created following a set of parameters such as stratification type, permissibility of airflow, and width of interstitial space.
THERMAL ENVIRONMENTS OF AN OFFICE BUILDING WITH DOUBLE SKIN FACADE
As a symbol of green architecture, double skin facade (DSF) represents a design which possesses many energy saving features, but due to the complexity of the system, the real performances and benefits have been difficult to predict. The objective of this study was to inform the applicability of DSFs, and contribute to the positive impacts of DSF designs. This study compared and contrasted energy savings in a temperate climate, where heating was the dominant energy strategy, and in a subtropical climate, where cooling spaces was the dominant issue. This paper focused on a university office building with a west facing shaft box window facade. The research method was a paired analysis of simulation studies which compared the energy performance of a set of buildings in two different climates. Simulation results showed a good agreement with measurements undertaken in the exiting building during a two-week period. The results specified that DSFs are capable of almost 50% energy savings in temperate and 16% in subtropical climates. Although these indicated DSFs are more suitable for temperate climates than warmer regions, the amount of energy savings in subtropical climates were also considerable. However, due to the costs of DSFs and potential loss of leasable floor area, investigations into other feasible ventilation options are necessary before final building design decisions are made.
Solar Energy, 2003
Double-skin envelopes are an attractive design option for high-end buildings. They allow architects to combine completely transparent external facades with an internal skin, which can also be transparent, or partially opaque. Between both skins there is an air channel that is used to collect or evacuate the solar radiation absorbed by the facade. This design may be a solution for reducing thermal overheating, which is common in completely transparent facades in Mediterranean climates. A numerical code was developed to analyze and predict the thermal behaviour of these facades. This code was applied to the analysis of the Ôstandard' geometry of a double-skin facade. A parametric study was carried out for typical Mediterranean climates to determine the influence of different variables, such as the position of blinds, the introduction of solid-liquid phase-change materials (PCM) and the use of low-glazing, etc. In order to characterize the thermal performance of the facades, two coefficients were defined that relate the indoor and enthalpic gains to the solar radiation. If they are designed carefully, ventilated facades will exhibit a significantly better passive behaviour than conventional glazed facades and also allow energy to be collected in the form of hot air to be used to reduce energy consumption in winter.
Thermal Environments of an Office Building with Double Skin Facade/ Journal of Green Building 2017
As a symbol of green architecture, double skin facade (DSF) represents a design which possesses many energy saving features, but due to the complexity of the system, the real performances and benefits have been difficult to predict. The objective of this study was to inform the applicability of DSFs, and contribute to the positive impacts of DSF designs. This study compared and contrasted energy savings in a temperate climate, where heating was the dominant energy strategy, and in a subtropical climate, where cooling spaces was the dominant issue. This paper focused on a university office building with a west facing shaft box window facade. The research method was a paired analysis of simulation studies which compared the energy performance of a set of buildings in two different climates. Simulation results showed a good agreement with measurements undertaken in the exiting building during a two-week period. The results specified that DSFs are capable of almost 50% energy savings in temperate and 16% in subtropical climates. Although these indicated DSFs are more suitable for temperate climates than warmer regions, the amount of energy savings in subtropical climates were also considerable. However, due to the costs of DSFs and potential loss of leasable floor area, investigations into other feasible ventilation options are necessary before final building design decisions are made.
THE IMPACT OF THE DOUBLE SKIN FACADE ON THE THERMAL AND ENERGY EFFICIENT OF BUILDINGS
1st International Conference : New Trends on Innovative Construction Materials, 2021
The mastering of the thermal ambient in buildings across the facade while minimizing the energy consumption is considered a challenge for designers. Nowadays, this challenge has become more difficult to meet especially with the current climatic and economic conditions that have made energy performance a global requirement in all areas, particularly in the building sector. The facade of a building is a very important architectural element, which influences several dimensions of the building, in particular, the appearance, the comfort of the users, the environmental protection and the durability of the construction. From a material and thermal point of view, it is, by excellence, a place of interaction and thermal exchange between the interior and the exterior. The performance of which depends on both material, conceptual and technical factors. The aim of this research is to study the thermal effect and the energy performance of the double skin facade "DSF" in a desert climate (the city of Biskra). This study is based on an experimental approach on a scale model where ambient and external surface temperatures were measured in test cells. A numerical simulation using the dynamic thermal software "TRNSYS 17" completed the study in order to assess the impact of the "DSF" on the energy efficiency of the construction. The results showed that the double skin facade is an efficient and durable device because it positively influences the thermal and energy performance of the facade especially in summer while preserving the environment.
Journal of Asian Architecture and Building Engineering, 2016
The energy performance and thermal comfort of an office building with single and double skin facades, in a warm climate was studied using TAS software. A double-skin facade is an envelope construction that consists of two transparent surfaces separated by a cavity. The extra skin can reduce cooling demand in summer and heating demand in winter. It is concluded that in a warm climate office, a double skin facade can perform better than a single skin facade. In a warm climate a double skin facade fully provides heating and thermal comfort in winter. In a warm climate however its benefit in summer is limited. Further studies are needed to increase the performance of double skin facades in summer.