Pris: 29,-

Abstrakt

This 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 results show that significant efforts are needed in order to establish ventilated double-skin facades in Norwegian buildings as high energy efficient solutions. In particular, significant improvements of construction details regarding insulation levels and air tightness of the envelope are needed. The best solution provides a heating energy use reduction of 59% but the importance of level of details became obvious. Also, a clear ventilation strategy has to be found.
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.

Referanser

Annex44 (2006), \'State of the Art review of methods and tools for designing integrated building concepts\', Integrating responsive building elements in buildings , accessed 23 October 2006.

Haase, M. and Amato, A. (2006), \'Performance evaluation of three different façade models for sustainable office buildings\', Journal of Green Building, 1 (2).

Haase, M., Marques da Silva, F., and Amato, A. (2009), \'Simulation of ventilated facades in hot and humid climates\', Energy and Buildings, 41 (4), 361-73.

NS-ISO7730 (2005), \'Ergonomics of the thermal environment - Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria\', (7730: Standard Norge).

Poirazis, Harris (2004), \'Double-skin facades for office buildings\', (Lund: Division of Energy and Building Design, Department of Construction and Architecture, Lund Institute of Technology, Lund University), 196.

Saelens, Dirk (2002), \'Energy performance assessment of single storey multiple-skin facades\', PhD (KATHOLIEKE UNIVERSITEIT LEUVEN).

TRNSYS (2005), \'Trnsys16 user manual\', [User manual], (updated Oct 2006) , accessed Jan 2005.





Forrige artikkel      Neste artikkel