The Experts below are selected from a list of 4071 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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The most efficient position of shading devices in a Double-Skin Facade
Energy and Buildings, 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 solar protections use. External solar protections are more effective than internal shading devices. In the case of the Double-Skin Facade, the blinds can be integrated in the cavity. It is thus protected from the bad weather and pollution. Solar protection can remain in place even in the event of important wind, which represents an undeniable advantage for the buildings with great height. This article examines the influence of the position and the colour of the blinds on the cooling consumption of an office building with a Double-Skin Facade. (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.
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Optimal operation of a south Double-Skin Facade
Energy and Buildings, 2004Co-Authors: Elisabeth Gratia, Andre De HerdeAbstract: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 esthetic 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 behaviour in operation. In this matter, we choose to study a multistory Double-Skin Facades behaviour. Simulations were realized with TAS software on the building proposed in the frame of the subtask A of the Task 27 (performance of solar Facade components) of the International Energy Agency. Simulations were performed on the chosen building with and without Double-Skin Facades. We decide to study eight types of days; and we analyze the Double-Skin Facade behaviour for various operations. The thermal behaviours of the building with and without Double-Skin are compared. The study of these eight cases showed the importance of the dynamic use of the Double-Skin. The operation of this one must be obligatorily related to the climatic conditions as well external as interior and a bad operation of the Double-Skin could lead to catastrophic results. (C) 2003 Elsevier B.V. All rights reserved.
Elisabeth Gratia - 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.
-
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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The most efficient position of shading devices in a Double-Skin Facade
Energy and Buildings, 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 solar protections use. External solar protections are more effective than internal shading devices. In the case of the Double-Skin Facade, the blinds can be integrated in the cavity. It is thus protected from the bad weather and pollution. Solar protection can remain in place even in the event of important wind, which represents an undeniable advantage for the buildings with great height. This article examines the influence of the position and the colour of the blinds on the cooling consumption of an office building with a Double-Skin Facade. (C) 2006 Elsevier B.V. All rights reserved.
-
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.
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Optimal operation of a south Double-Skin Facade
Energy and Buildings, 2004Co-Authors: Elisabeth Gratia, Andre De HerdeAbstract: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 esthetic 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 behaviour in operation. In this matter, we choose to study a multistory Double-Skin Facades behaviour. Simulations were realized with TAS software on the building proposed in the frame of the subtask A of the Task 27 (performance of solar Facade components) of the International Energy Agency. Simulations were performed on the chosen building with and without Double-Skin Facades. We decide to study eight types of days; and we analyze the Double-Skin Facade behaviour for various operations. The thermal behaviours of the building with and without Double-Skin are compared. The study of these eight cases showed the importance of the dynamic use of the Double-Skin. The operation of this one must be obligatorily related to the climatic conditions as well external as interior and a bad operation of the Double-Skin could lead to catastrophic results. (C) 2003 Elsevier B.V. All rights reserved.
Zhao Yang - One of the best experts on this subject based on the ideXlab platform.
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Natural ventilation in the double skin Facade with venetian blind
Energy and Buildings, 2008Co-Authors: Zhao YangAbstract:Abstract As a new-style building, the thermal performance of double skin Facade with the venetian blind cannot be predicted for the absence of suitable tool. In the paper, a detailed analysis of the thermal process in glass double Facade with venetian blind was made. The governing equations were solved by comprising CFD, optical and heat balance model for multi-layer transparent system. It is shown that the more complex natural ventilation exists in the two air gaps divided by venetian blind, which cannot be reflected with the simplified model. Comparing the simulation results with the experiment data in the literature, a good agreement was achieved. Hence, it can be used as a reliable tool to analyze the ventilation in the double skin Facade with a venetian blind.
Tokiyoshi Yamada - One of the best experts on this subject based on the ideXlab platform.
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natural ventilation performance of a double skin Facade with a solar chimney
Energy and Buildings, 2005Co-Authors: Wenting Ding, Yuji Hasemi, Tokiyoshi YamadaAbstract:Double-Skin Facade is getting more and more attention as it provides many possibilities for energy conservation and at the same time creates good indoor environment. In this paper, natural ventilation performance of a Double-Skin Facade is highlighted. A prototype building is proposed, which is thought to be an eight-storey office building with an atrium space in the north side. The south Facade of the building is a Double-Skin Facade and a thermal storage space called solar chimney is considered above the Double-Skin space. Actually, the Double-Skin space is connected with the chimney channel. Reduced scale model experiments and computational fluid dynamics (CFD) analysis are carried out in this research to evaluate the natural ventilation performance of the prototype building.
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Smoke control using a Double-Skin façade
Fire Safety Science, 2005Co-Authors: Wenting Ding, Yuji Hasemi, Tokiyoshi YamadaAbstract:Double-Skin Facades have been increasingly used as they open up new possibilities for clients and planners seeking creative new designs that are intelligently adapted to environmental conditions. Among them natural ventilation is commonly carried out in a building with Double-Skin Facades. However Double-Skin Facade construction is still not covered by statutory building regulations. Virtually no information exists on the behavior of this kind of Facade in case of a fire. Usually for a building with a multistory Double-Skin Facade, smoke of a fire room escaping through the inner Facade into the intermediate space between the two skins may accumulate and spread horizontally and/or vertically to other rooms that have openings connected to the intermediate space for the purpose of natural ventilation. However if smoke pressure in the intermediate space can be kept lower than that of the room, smoke spread through the openings will be prevented. Considering similarity of smoke movement and stack natural ventilation, in this paper a Double-Skin Facade used for natural ventilation is also considered for smoke control. As the results, it is proved that smoke spread can be prevented with suitable opening arrangements. Therefore natural ventilation and smoke control can be realized through one system. Reduced scale model experiments and computational fluid dynamics (CFD) analysis are carried out in this research.
Wenting Ding - One of the best experts on this subject based on the ideXlab platform.
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Smoke control through a Double-Skin façade used for natural ventilation
Ashrae Transactions, 2006Co-Authors: Wenting Ding, Yuji HasemiAbstract:Double-Skin Facades have been increasingly used, as they open up new possibilities for clients and planners seeking creative new designs that are intelligently adapted to environmental conditions. Natural ventilation is commonly carried out in a building with Double-Skin Facades; however, Double-Skin Facade construction is still not covered by statutory building regulations. Virtually no information exists on the behavior of this kind of Facade in case of a fire. Usually, for a building with a multistory Double-Skin Facade, smoke from afire room escaping through the inner Facade into the intermediate space between the two skins may accumulate and spread horizontally and/or vertically to other rooms that have openings connected to the intermediate space for the purpose of natural ventilation. However, considering the similarity of smoke movement and stack ventilation-both driven by stack effect-this paper considers using a Double-Skin Facade for smoke control as well as for natural ventilation. As a result, it is proved that smoke spread can be prevented with suitable arrangement of openings. Therefore, natural ventilation and smoke control can be realized through one system. Reduced-scale model experiments and computational fluid dynamics (CFD) analysis were carried out in this research.
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natural ventilation performance of a double skin Facade with a solar chimney
Energy and Buildings, 2005Co-Authors: Wenting Ding, Yuji Hasemi, Tokiyoshi YamadaAbstract:Double-Skin Facade is getting more and more attention as it provides many possibilities for energy conservation and at the same time creates good indoor environment. In this paper, natural ventilation performance of a Double-Skin Facade is highlighted. A prototype building is proposed, which is thought to be an eight-storey office building with an atrium space in the north side. The south Facade of the building is a Double-Skin Facade and a thermal storage space called solar chimney is considered above the Double-Skin space. Actually, the Double-Skin space is connected with the chimney channel. Reduced scale model experiments and computational fluid dynamics (CFD) analysis are carried out in this research to evaluate the natural ventilation performance of the prototype building.
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Smoke control using a Double-Skin façade
Fire Safety Science, 2005Co-Authors: Wenting Ding, Yuji Hasemi, Tokiyoshi YamadaAbstract:Double-Skin Facades have been increasingly used as they open up new possibilities for clients and planners seeking creative new designs that are intelligently adapted to environmental conditions. Among them natural ventilation is commonly carried out in a building with Double-Skin Facades. However Double-Skin Facade construction is still not covered by statutory building regulations. Virtually no information exists on the behavior of this kind of Facade in case of a fire. Usually for a building with a multistory Double-Skin Facade, smoke of a fire room escaping through the inner Facade into the intermediate space between the two skins may accumulate and spread horizontally and/or vertically to other rooms that have openings connected to the intermediate space for the purpose of natural ventilation. However if smoke pressure in the intermediate space can be kept lower than that of the room, smoke spread through the openings will be prevented. Considering similarity of smoke movement and stack natural ventilation, in this paper a Double-Skin Facade used for natural ventilation is also considered for smoke control. As the results, it is proved that smoke spread can be prevented with suitable opening arrangements. Therefore natural ventilation and smoke control can be realized through one system. Reduced scale model experiments and computational fluid dynamics (CFD) analysis are carried out in this research.