Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Cooling Demand Reduction Approaches in a Nearly Zero Energy Building for Future City District in Central-Sweden

Sana Sayadi, Abolfazl Hayati, Jan Akander, Mathias Cehlin
Universuty of Gävle, Sweden

Abstract: The increase in population and living standards, as well as global warming and heatwaves due to climate change, have created a challenge to meet the cooling demand in buildings. In this study, the cooling requirement for a multifamily building through simulations in a future city district in central-Sweden was determined. Different air supply set point strategies, window to floor ratio and building rotations were employed to minimize the cooling requirements. The building was modelled so as to meet the Nearly Zero Energy Building (NZEB) requirements. Window to floor ratio of 10% with a piecewise proportional controller for supply temperature was depicted as appropriate for the building. A 45° rotation of the building increased the cooling demand. The cooling demand of the building increased by employing the extreme climate condition, as a representative for future climate, with factors 3.8 and 6.4 for cooling set points 25°C and 27°C for window to floor ratio 10%. This implies the need for a resilient building to withstand future climate conditions. The requirement to update the climate files was also used for decision making in the design process and building regulation.
Keywords: Building simulation, multi-family buildings, energy efficiency measure, future weather
Pages: 1413 - 1420