Impact of climate change on nearly zero-energy dwelling in a temperate climate: Time-integrated discomfort, HVAC energy performance, and GHG emissions
This paper projects the current and future climate scenarios' impacts on a nearly zero-energy dwelling in Brussels. Initially, a time-integrated discomfort assessment is carried out for the base case without any active cooling system. It is found that overheating risk will increase up to 528%, whereas the overcooling risk will decrease up to 32% by the end of the century. It also resulted that the overheating risk will overlap the overcooling risk by the 2090s under high emission scenarios. Subsequently, two commonly applied HVAC strategies are considered: a gas-fired boiler + an air conditioner (S01) and a reversible air-to-water heat pump (S02). S02 shows ∼6–13% and 15–27% less HVAC primary energy use and GHG emissions compared to S01, respectively. The sensitivity analysis found that the choice of the HVAC strategy, heating set-point, and cooling set-point are among the most influential parameters determining the HVAC primary energy use. Finally, some future recommendations are provided for practice and future research.
This research was funded by the Walloon Region under the call ‘Actions de Recherche Concert´ees 2019 (ARC)’ (funding number: ARC 19/23-05). The authors would like to gratefully acknowledge the Walloon Region and the University of Liege for funding.
Also, this study is a part of the International Energy Agency (IEA) EBC Annex 80 – “Resilient cooling of buildings” project activities to define resilient cooling in residential buildings. We also appreciate the guidance and support provided by Mr. Patrick Van Beeck.
Keywords: Global warming; Heating Energy Use; Cooling Energy Use; Primary Energy Use; Overheating; Overcooling
Citation: Rahif, R., Norouziasas, A., Elnagar, E., Doutreloup, S., Pourkiaei, S. M., Amaripadath, D., ... & Attia, S. (2022). Impact of climate change on nearly zero-energy dwelling in a temperate climate: Time-integrated discomfort, HVAC energy performance, and GHG emissions. Building and Environment, 223, 109397.
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The article was published by Ramin Rahif, Alireza Norouziasas, Essam Elnagar, Sébastien Doutreloup, Seyed Mohsen Pourkiaei, Deepak Amaripadath, Anne-Claude Romain, Xavier Fettweis and Shady Attia.
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