Double-skin facade technology for energy-efficient commercial building refurbishment in Norway
|Forfattere||Matthias Haase, Tore Wigenstad|
|Institusjon||Norwegian University of Science and Technology, Trondheim, Norway. and SINTEF Building and Infrastructure, Trondheim, Norway.|
|Nøkkelord||airflow network, double skin facade, facade refurbishment, Trnsys|
|Redaktør||Vojislav Novakovic, Sten Olaf Hanssen, Hans Martin Mathisen|
AbstraktThis work is part of the project “Low Energy Commercial Buildings” (leco) run by SINTEF Building and Infrastructure. The project’s principal objectives are to develop more energy-efficient buildings The project includes analyses of building envelopes applied in different kinds of climates, different uses, and different construction methods.
Energy-efficient building refurbishment in Norway is becoming a main focus. With the help of dynamic computer simulations of energy and indoor environment for a case building in Norway the impact of an additional ventilated glass facade on energy use and indoor environment was analyzed. A focus was put on a comparison of energy use and thermal comfort levels of various cases. Here, it became obvious that airflow in the double skin façade needs to be integrated into the existing ventilation system.
Main parameters to study were:
- different construction standards (air tightness, thermal bridges, and facade design) and its energy use implications
- simulation robustness in dependence of different assumptions (thermal bridges in and air tightness of the existing building)
- airflow control strategies and its energy use implications
- comfort criteria and energy issues (thermal vs. visual comfort vs. heating cooling demand)
The design of energy robust, energy efficient, and comfortable buildings was possible with advanced building simulation. The strategy developed for improving building performance with an additional ventilated glass layer is an important step towards a more sustainable building stock in Norway.
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