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A platform for research: civil engineering, architecture and urbanism
Closed translucent façade elements with switchable U-value—A novel option for energy management via the facade
Graphical abstract
Highlights Switchable U-value as a way to cool buildings in summer when the outdoor temperature is lower than the indoor temperature. Controlling the convection within closed elements as a new way of realizing a switchable U-value. Experimental validation of the concept and parameter variation. Simulation of the new element using TRNSYS show interesting potential.
Abstract To prevent the overheating of a well-insulated building in summer, façade elements with switchable U-value are a possible solution. A new translucent element with switchable U-value is presented. The convection around a translucent insulation panel is controlled by moving this panel vertically within the double glazing unit. Measurements of such elements show a possible switching of more than +100% of the U-value between the insulating and conducting state. Various geometries have been measured, and the influence of CO2 in the cavity has also been investigated. Based on the experimental results, TRNSYS simulations have been performed to investigate the overall performance of such a new element integrated in a real building. An optimized element could lead to a reduction of the cooling demand of up to 29.6% of the useful energy and to large improvements in the summer comfort.
Closed translucent façade elements with switchable U-value—A novel option for energy management via the facade
Graphical abstract
Highlights Switchable U-value as a way to cool buildings in summer when the outdoor temperature is lower than the indoor temperature. Controlling the convection within closed elements as a new way of realizing a switchable U-value. Experimental validation of the concept and parameter variation. Simulation of the new element using TRNSYS show interesting potential.
Abstract To prevent the overheating of a well-insulated building in summer, façade elements with switchable U-value are a possible solution. A new translucent element with switchable U-value is presented. The convection around a translucent insulation panel is controlled by moving this panel vertically within the double glazing unit. Measurements of such elements show a possible switching of more than +100% of the U-value between the insulating and conducting state. Various geometries have been measured, and the influence of CO2 in the cavity has also been investigated. Based on the experimental results, TRNSYS simulations have been performed to investigate the overall performance of such a new element integrated in a real building. An optimized element could lead to a reduction of the cooling demand of up to 29.6% of the useful energy and to large improvements in the summer comfort.
Closed translucent façade elements with switchable U-value—A novel option for energy management via the facade
Pflug, Thibault (author) / Kuhn, Tilmann E. (author) / Nörenberg, Ralf (author) / Glück, Andre (author) / Nestle, Nikolaus (author) / Maurer, Christoph (author)
Energy and Buildings ; 86 ; 66-73
2014-09-13
8 pages
Article (Journal)
Electronic Resource
English
Translucent Thermal insulation Facade Systems KAPIPANE, KAPILUX
| British Library Conference Proceedings | 1996