Changing climate intensifies heat stress,resulting in a greater risk of workplace productivity decline in timber office buildings with low internal thermal mass.The impact of climate change induced heat exposure on in...Changing climate intensifies heat stress,resulting in a greater risk of workplace productivity decline in timber office buildings with low internal thermal mass.The impact of climate change induced heat exposure on indoor workplace productivity in timber office buildings has not been extensively researched.Therefore,further investigation to reduce the work capacity decline towards the end of the century is needed.Here,heat exposure in a net zero-carbon timber building near Brussels,Belgium,was evaluated using a reproducible comparative approach with different internal thermal mass levels.The analysis indicated that strategies with increased thermal mass were more effective in limiting the effects of heat exposure on workplace productivity.The medium and high thermal mass strategies reduced workplace productivity loss to 0.1%in the current,0.3%and 0.2%in the midfuture,and 4.9%and 3.9%for future scenarios.In comparison,baseline with low thermal mass yielded a decline of 2.3%,3.3%,and 8.2%.The variation in maximum and minimum wet-bulb globe temperatures were also lower for medium and high thermal mass strategies than for low thermal mass baseline.The study findings lead to the formulation of design guidelines,identification of research gaps,and recommendations for future work.展开更多
With climate change,the indoor built environment is expected to significantly influence the occupant’s safety and well-being.A novel multi-criteria thermal resilience certification scheme for indoor built environment...With climate change,the indoor built environment is expected to significantly influence the occupant’s safety and well-being.A novel multi-criteria thermal resilience certification scheme for indoor built environments during extreme heat events is proposed in this paper.The certification scheme considers overheating,thermal comfort,heat stress,and hygrothermal discomfort in built environments.These criteria are quantified using key performance indicators like indoor overheating degree,hours of exceedance,wet-bulb globe temperature,and heat index,respectively.This scheme is developed based on existing best practices like standards,rating systems,and literature.The scheme is implemented on a benchmark building energy performance model for detached post-World War II dwellings in Belgium as a case study using weather data measured from the City of Brussels.The indoor overheating in the reference dwelling is assessed with a static threshold of 27℃for the bedrooms and adaptive thresholds for other areas.The analysis found that the building performance is within the defined threshold levels throughout the heat wave duration for all criteria.Therefore,the reference dwelling got a maxi-mum attainable score of four points and is rated five-star for thermal resilience during heat waves.The proposed certification scheme is intended as a standardized framework and highlights the need for further revisions in building performance policies and guidelines.展开更多
基金the Service Public de Wallonie(SPW),Belgium,under BElgian WAllonia REsearch(BEWARE)fellowships and European Union(EU)framework program for research and innovation,Marie Skłodowska-Curie Actions(MSCA)through contract no.847587 for the Project SurChauffe.the U.S.Department of Energy,Office of Science,Office of Biological and Environmental Research’s Urban Integrated Field Laboratories research activity,under Award Number DE-SC0023520.+2 种基金the members of the School of Geographical Sciences and Urban Planning at Arizona State University,and Southwest Urban Corridor Integrated Field Laboratory(SW-IFL)for their support.We would also like to thank the stakeholders of Project OCCuPANt.the Sustainable Building Design Lab at the Faculty of Applied Sciences at the University of Liege for the valuable support and use of the state-of-the-art Super COmputeR ProcessIng wOrkstatioN(SCORPION)for building performance simulations and data analysis.the IEA EBC Annex 80-Resilient Cooling of Buildings.
文摘Changing climate intensifies heat stress,resulting in a greater risk of workplace productivity decline in timber office buildings with low internal thermal mass.The impact of climate change induced heat exposure on indoor workplace productivity in timber office buildings has not been extensively researched.Therefore,further investigation to reduce the work capacity decline towards the end of the century is needed.Here,heat exposure in a net zero-carbon timber building near Brussels,Belgium,was evaluated using a reproducible comparative approach with different internal thermal mass levels.The analysis indicated that strategies with increased thermal mass were more effective in limiting the effects of heat exposure on workplace productivity.The medium and high thermal mass strategies reduced workplace productivity loss to 0.1%in the current,0.3%and 0.2%in the midfuture,and 4.9%and 3.9%for future scenarios.In comparison,baseline with low thermal mass yielded a decline of 2.3%,3.3%,and 8.2%.The variation in maximum and minimum wet-bulb globe temperatures were also lower for medium and high thermal mass strategies than for low thermal mass baseline.The study findings lead to the formulation of design guidelines,identification of research gaps,and recommendations for future work.
基金supported by the U.S.Department of Energy,Office of Science,Office of Biological and Environmental Research’s Urban Integrated Field Lab-oratories research activity under Award Number DE-SC0023520.
文摘With climate change,the indoor built environment is expected to significantly influence the occupant’s safety and well-being.A novel multi-criteria thermal resilience certification scheme for indoor built environments during extreme heat events is proposed in this paper.The certification scheme considers overheating,thermal comfort,heat stress,and hygrothermal discomfort in built environments.These criteria are quantified using key performance indicators like indoor overheating degree,hours of exceedance,wet-bulb globe temperature,and heat index,respectively.This scheme is developed based on existing best practices like standards,rating systems,and literature.The scheme is implemented on a benchmark building energy performance model for detached post-World War II dwellings in Belgium as a case study using weather data measured from the City of Brussels.The indoor overheating in the reference dwelling is assessed with a static threshold of 27℃for the bedrooms and adaptive thresholds for other areas.The analysis found that the building performance is within the defined threshold levels throughout the heat wave duration for all criteria.Therefore,the reference dwelling got a maxi-mum attainable score of four points and is rated five-star for thermal resilience during heat waves.The proposed certification scheme is intended as a standardized framework and highlights the need for further revisions in building performance policies and guidelines.
