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Reducing cooling requirement by using cladding for external walls ventilated at rear |
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| รหัสดีโอไอ | |
| Title | Reducing cooling requirement by using cladding for external walls ventilated at rear |
| Creator | 1. Manuela Walsdorf-Maul 2. Frank U. Vogdt |
| Publisher | Joint Graduate School of Energy and Environment |
| Publication Year | 2557 |
| Keyword | Reducing cooling requirement, energy efficiency, opaque building components, air flow, curtain wall |
| Abstract | The choice of building components can significantly influence the energy performance of buildings. In cold climates building components determine the dimensions of transmission and ventilation heat loss and are crucial to thermal comfort. On the other hand, the amount of solar heat gain in hot climates depends on the building components as well. Transparent components have a higher influence and play a more important role for heating up buildings than nontransparent (opaque) components do. Therefore more research has been conducted on transparent building components until now. Research on claddings has been neglected, even though it could prove to have a substantial influence on energy savings with respect to cooling. Claddings for external walls ventilated at rear (opaque) are characterized in their thermal behavior primarily by the properties of thermal insulation material and the micro-climatic conditions in the air layer. In summer situations, the temperature differences between surface temperature, exterior and interior and also the air gap temperature cause stack-effects. Therefore, a higher air mass flow for the air gap is expected. As a result, it can be supposed that the heat from the exterior layered cladding is reduced by heat transportation of the airflow. This paper deals with experimental studies to investigate and calculate the volumetric air flow of claddings for external walls ventilated at rear and their influence on reducing the cooling requirement. For this purpose, different cladding surfaces have been investigated. |
| ISBN | 978-616-92228-1-1 |
