The Experts below are selected from a list of 32418 Experts worldwide ranked by ideXlab platform
Andre De Herde - One of the best experts on this subject based on the ideXlab platform.
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guidelines for improving natural daytime ventilation in an office building with a double skin facade
Solar Energy, 2007Co-Authors: Elisabeth Gratia, Andre De HerdeAbstract:In recent years, there has been a great deal of interest in double-skin Facades due to the advantages claimed for this technology in terms of energy saving in the cold season, protection from external noise and wind loads and their high-tech image. The advent of computers and other office equipment has increased the internal heat gains in most offices. Highly glazed Facades, together with the extra heat gains from the electric lighting made necessary by deep floor plans and the wider use of false ceilings, have increased the risk of overheating, To preserve comfort and reduce cooling loads, it is important to apply natural cooling strategies, including natural ventilation. Some argue that double-skin Facades are designed to improve natural ventilation in buildings by the stack effect, and to allow this even in situation in which it is generally not possible due to high outdoor noise levels and/or high wind speeds. But poor operation of the double-skin facade openings can generate disastrous scenarios such as the injection of hot air from the double-skin facade into the offices and the contamination of offices on the upper floors by used air from the offices on the lower floors. This article examines how natural ventilation can be utilised in an office building with a double-skin facade during a sunny summer's day. It mainly considers natural daytime ventilation in relation to the orientation of the double skin and the speed and direction of the wind. (C) 2006 Elsevier Ltd. All rights reserved.
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Greenhouse effect in double-skin facade
Energy and Buildings, 2007Co-Authors: Elisabeth Gratia, Andre De HerdeAbstract:In these last years, a great deal of interest has been devoted to double-skin Facades due to the advantages claimed by this technology (in terms of energy saving in the cold season, high-tech image, protection from external noise and wind loads). One of the great characteristics of the double-skin facade is the greenhouse effect. We identify the factors that influence the greenhouse effect. The identified parameters are solar radiation level, orientation and shading devices use, opaque wall/window proportion of the interior facade, wind speed, colour of shading devices and of interior facade, depth of the cavity of the double-skin, glazing type in the interior facade and openings in the double-skin. We analyze the impact of these parameters on the mean air temperature evolution in the cavity. After that analyse, the article answers the question: is greenhouse effect favourable? The answer is moderate according to the double-skin orientation. (C) 2006 Elsevier B.V. All rights reserved
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Natural ventilation in a double-skin facade
Energy and Buildings, 2004Co-Authors: Elisabeth Gratia, Andre De HerdeAbstract:Double-skin Facades are assuming an ever-greater importance in modern building practice. There is an increasing demand for higher quality office buildings. Occupants and developers of office buildings ask for a healthy and stimulating working environment. Double-skin Facades are appropriate when buildings are subject to great external noise and wind loads. A further area of application is in rehabilitation work, when existing Facades cannot be renewed, or where this is not desirable. Double-skin Facades have a special aesthetic of their own, and this can be exploited architecturally to great advantage. However, there are still relatively few buildings in which double-skin Facades have actually been realized, and there is still too little experience of their behavior in operation. In this matter, we choose to study the natural ventilation in multi-storey double-skin Facades. Simulations where realized with TAS software on a building proposed in the frame of the subtask A of the Task 27 (performance of solar facade components) of the International Energy Agency, Solar Heating and Cooling Program. We decide to study a sunny summer day; and we analyze the double-skin facade behavior for various conditions: impact of the double-skin orientation and impact of the wind orientation and the degree of wind protection. © 2003 Elsevier B.V. All rights reserved.
Eduardo Blanco - One of the best experts on this subject based on the ideXlab platform.
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energy performance of an open joint ventilated facade compared with a conventional sealed cavity facade
Solar Energy, 2011Co-Authors: Cristina Sanjuan, Maria Jose Suarez, Marcos Gonzalez, Jorge Pistono, Eduardo BlancoAbstract:Abstract The term “open-joint ventilated Facades” refers to a building system in which coating material (metallic, ceramic, stone or composite) is hanged by means of a metallic-frame structure to the exterior face of the wall, creating an air cavity between wall and slabs. The coating material is placed in an arrangement of slabs and a series of thin joints from slab to slab to allow the surrounding air to enter and leave the cavity all along the wall. In addition to aesthetic and constructive reasons, the main interest in open joint ventilated Facades is their ability to reduce cooling thermal loads. This is achieved by the buoyancy effect induced by solar radiation inside the ventilated cavity, where the air can enter or leave freely through the joints. This paper focuses on the phenomena produced on a typical open joint ventilated facade, and the comparison of its energy performance with that of a conventional sealed air cavity facade. The thermo fluid-dynamic behaviour of both systems has been analysed with CFD techniques and the results of the 3D simulations conclude that open-joint ventilated Facades can help to achieve important energy savings in climates with hot summers and mild winters.
K Baardolf - One of the best experts on this subject based on the ideXlab platform.
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a completely transparent adhesively bonded soda lime glass block masonry system
Journal of Facade Design and Engineering 2 (3-4) 2014, 2015Co-Authors: F Oikonomopoulou, F A Veer, R Nijsse, K BaardolfAbstract:A pioneering, all transparent, self-supporting glass block facade is presented in this paper. Previously realized examples utilize embedded metal components in order to obtain the desired structural performance despite the fact that these elements greatly affect the facade’s overall transparency level. Undeniably, the oxymoron ‘transparency and strength’ remains the prime concern in such applications. In this paper, a new, innovative structural system for glass block Facades is described, which demonstrably meets both criteria. The structure is exclusively constructed by monolithic glass blocks, bonded with a colourless, UV-curing adhesive, obtaining thus a maximum transparency. In addition, the desired structural performance is achieved solely through the masonry system, without any opaque substructure. Differing from previous realized projects, solid soda-lime glass blocks are used rather than borosilicate ones. This article provides an overview of the integrated architectural and structural design and discusses the choice of materials. The structural verification of the system is demonstrated. The results show that the adhesively bonded glass block structure has the required self-structural behaviour, but only if strict tolerances are met in the geometry of the glass blocks.
Baardolf G. - One of the best experts on this subject based on the ideXlab platform.
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A completely transparent, adhesively bonded soda-lime glass block masonry system
'IOS Press', 2014Co-Authors: Oikonomopoulou F., Veer F.a., Nijsse R., Baardolf G.Abstract:A pioneering, all transparent, self-supporting glass block facade is presented in this paper. Previously realized examples utilize embedded metal components in order to obtain the desired structural performance despite the fact that these elements greatly affect the facade’s overall transparency level. Undeniably, the oxymoron ‘transparency and strength’ remains the prime concern in such applications. In this paper, a new, innovative structural system for glass block Facades is described, which demonstrably meets both criteria. The structure is exclusively constructed by monolithic glass blocks, bonded with a colourless, UV-curing adhesive, obtaining thus a maximum transparency. In addition, the desired structural performance is achieved solely through the masonry system, without any opaque substructure. Differing from previous realized projects, solid soda-lime glass blocks are used rather than borosilicate ones. This article provides an overview of the integrated architectural and structural design and discusses the choice of materials. The structural verification of the system is demonstrated. The results show that the adhesively bonded glass block structure has the required self-structural behaviour, but only if strict tolerances are met in the geometry of the glass blocks.Architectural Engineering +TechnologyArchitecture and The Built Environmen
Nenad Šekularac - One of the best experts on this subject based on the ideXlab platform.
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Glass and Media Facades - Energy Refurbishment
2018Co-Authors: Jasna Čikić Tovarović, Jelena Ivanović-Šekularac, Nenad ŠekularacAbstract:Modern cities and their architectural structures undergo significant functional and physical changes. In recent years, the interventions on building envelopes have increased. Therefore, it is necessary to analyze potential remodeling of glass Facades, along with applying the concept of smart technologies, in order to increase energy efficiency of the existing buildings. This paper analyzes the modernization process of devastated glass facade of the tall Slavija hotel, built in 1960s in Belgrade, Serbia, taking into consideration some positive examples of transformation and reskinning of buildings, where the aspect of medialization is an active part of urban renewal. The subject of this paper is the analysis of research findings about the improved thermal comfort of this building, after performing the replacement of its glass facade and converting the hotel building into a office building. Special attention was paid to the implementation of media Facades technologies and final effects on energy balance of the newly designed facade. The proposed solution is supposed to evaluate the improved thermal comfort that was achieved by a radical renovation of the facade and by replacing the existing facade with a new single facade (double and triple glazed units), with media elements as well as without them. The research results are presented as proposals for improving EE public buildings by implementing the latest system of curtain walls in order to increase the value of the buildings. One of the most important criteria included in the process of energy refurbishment is technological improvement of the existing buildings, along with the presentation of media Facades. The case study is based on Energy Plus simulations.
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renovation of existing glass facade in order to implement energy efficiency and media facade
Energy and Buildings, 2017Co-Authors: Jasna Cikic Tovarovic, Jelena Ivanovicsekularac, Nenad ŠekularacAbstract:Abstract Modern cities and their architectural structures undergo significant functional and physical changes. In recent years, the interventions on building envelopes have increased. Therefore, it is necessary to analyse potential remodeling of glass Facades, along with applying the concept of smart technologies, in order to increase energy efficiency of the existing buildings. This paper analyses the modernization process of devastated glass facade of the tall Slavija hotel, built in 1960s in Belgrade, Serbia, taking into consideration some positive examples of transformation and reskinning of buildings, where the aspect of medialization is an active part of urban renewal. The subject of this paper is the analysis of research findings about the improved thermal comfort of this building, after performing the replacement of its glass facade and converting the hotel building into an office building. Special attention was paid to the implementation of media technologies and final effects on energy balance of the newly designed facade. The proposed solution is supposed to evaluate the improved thermal comfort that was achieved by a radical renovation of the facade and by replacing the existing facade with a new single facade (double and triple glazed units), with media elements as well as without them. The research results are presented as proposals for improving EE public buildings by implementing the latest system of curtain walls in order to increase the value of the buildings. One of the most important criteria included in the process of energy refurbishment is technological improvement of the existing buildings, along with the presentation of media Facades. The case study is based on EnergyPlus simulations.
