Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Climate change sensitive overheating assessment in dwellings: a case study in Belgium

Ramin Rahif 1, Abdulrahman Fani 1, Piotr Kosinski 2, Shady Attia 1
1 Sustainable Building Design Lab, Dept. UEE, Faculty of Applied Sciences, Université de Liege, Belgium
2 Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Heweliusza Street 10, 10-724 Olsztyn, Poland

Abstract: Due to the current rate of global warming, overheating in buildings is expected to be more frequent and intense in future climates. High indoor temperature affects occupant productivity, comfort, and health. Thus, it is necessary to predict the thermal performance of buildings concerning climate change. This paper applies a climate change sensitive overheating assessment method to a lightweight timber house in Eupen, Belgium. Three metrics are used, namely Indoor Overheating Degree (IOD), Ambient Warmness Degree (4TD), and Building Climate Vulnerability Factor (BCVF). The overheating risk is assessed under four climate scenarios representing historical and future scenarios using dynamic simulation tool EnergyPlus v9.0. This method accounts for overheating severity and frequency, considering zonal occupancy profiles and thermal comfort models. The results indicate BCVF<1 for the Passive House case study showing its high potential in suppressing the outdoor thermal stress in the long-term. Finally, the increase in ventilation rate proves to be an adequate measure by decreasing the zonal peak temperatures up to 10°C and indoor overheating risk by ~60%.
Keywords: thermal discomfort, global warming, long-term thermal discomfort, thermal comfort
Pages: 704 - 710