Modeling a Naturally Ventilated Double Skin Façade with a Building Thermal Simulation program (original) (raw)
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2008
Double Skin Facades (DSFs) have been developed as an alternative technology to improve the thermal performance of conventional fully glazed buildings. Nevertheless, there is little test information on the behaviour and real performance of DSFs. This is specifically the case when the facade has to perform under extreme or moderate summer conditions. The characteristics of thermal overheating of a specific type of DSF with various configurations and its practical control have not been subjected to systematic experimental and computational investigations. This research which is based on an existent load of knowledge, carried out experiments of a full-scale one-storey laboratory chamber of a selected type of Double Skin Facade in which a comparative analysis of the thermal performance is assessed, CFD simulations of the experimental model and a Field Case Study of an existing building in the United Kingdom is also monitored. The basic thermal behaviour in the facade cavity and adjacent ...
Applied Sciences
In the context of energy conservation and sustainable development, building design should take into account the energy efficiency criteria by using renewable energy sources. Double-skin facades (DSF) represent innovative energy-efficient techniques that have gained increasing interest worldwide. The present study reports the results of an experimental campaign performed on a full-scale double-skin façade using the in-situ measurement methodology. The thermodynamic behavior of the façade is studied under real exterior climatic conditions in Romania in hot and cold seasons, and performance indicators in terms of pre-heating efficiency and dynamic insulation efficiency were determined. Three summer periods are analyzed corresponding to the outdoor air curtain scenario for three ventilation modes in naturally or mechanically ventilated single-story DSF. Results revealed that the third ventilation scenario, which combines horizontal and vertical openings, gives the best efficiency of 71....
The effect of the ventilated facade on the thermal control and energy consumption of buildings
International Meeting on Advanced Technologies in Energy and Electrical Engineering, 2019
The facade of buildings is a heat exchange interface between the internal environment and the external environment. It represents the area where large thermal losses occur through convection, conduction and radiation. These modes of transfer have a considerable influence on the thermal operation of the building. This study presents an experimental study of the impact of natural convection of the air cavity of a ventilated facade on its thermal and energy efficiency during the cold period in the city of Biskra (hot and arid zones). The research was based on an experimental study by taking indoor and outdoor ambient and surface temperature measurements in cells tested on a reduced scale and then by numerical simulation using the dynamic thermal software TRNSYS. The results confirmed that the natural convection of the air cavity of a ventilated facade has a positive influence on the thermal operation and energy performance of the building during the winter period with the improvement of the ambient temperature (Ta above 20 °C) and the reduction of the energy consumption used for heating by up to 15%.
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.
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.