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An exploratory study on road tunnel with semi-transparent photovoltaic canopy-From energy saving and fire safety perspectives

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Building Simulation 2022年第4期15卷 537-548页

作者： Dahai Qi Senwen Yang Chang Shu Xin Zhang Liangzhu(Leon)Wang Andreas Athienitis Department of Civil and Building Engineering Universite de Sherbrooke2500boul.de I'UniversiteSherbrookeQuebec J1K2R1Canada Centre for Zero Energy Building Studies Department of BuildingCivil and Environmental EngineeringConcordia University1455 de Maisonneuve Blvd.WestMontrealQuebec H3G 1M8Canada

Road tunnels consume a large amount of energy,especially in the Canadian cold climate,where the roads are heated electrically or deicing during the *** a more sustainable and resilient road tunnel energy system,we conducted an exploratory study on installing a semi-transparent photovoltaic(STPV)canopy at the entrances and exits of a tunnel under a *** proposed system generates solar-powered electricity,improves thermal and visual conditions,and reduces energy *** this study,field measurements of road surface temperature and air temperature were conducted,and numerical simulations with and without STPV were performed to study air and road surface temperatures under different traffic *** field measurements show the road surface temperatures are higher than the air temperature on *** interior air and road surface temperature were measured to be above 0°C,even though the outdoor temperature is far below 0°C,thus significantly reducing the need for deicing in winter using *** simulations show that the air and surface temperatures elevate due to the solar transmission heat through the STPV canopy,thus reducing deicing energy consumption *** fire safety analysis also showed that the proposed system's top opening should be located near the tunnel entrance instead of the canopy entrance for better smoke exhaust during a fire.

关键词： STPV road tunnel fire safety energy efficiency cold climate

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Solar radiation-based method for early design stages to balance daylight and thermal comfort in office buildings

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Frontiers of Architectural Research 2023年第5期12卷 1030-1046页

作者： Abel Sepúlveda Seyed Shahabaldin Seyed Salehi Francesco De Luca Martin Thalfeldt Department of Civil Engineering and Architecture Tallinn University of TechnologyTallinn 19086Estonia Institute of Design and Civil Engineering Karlsruhe Institute of TechnologyKarlsruhe 76131Germany FinEst Centre for Smart Cities(FinEst Centre) Tallinn University of TechnologyTallinn 19086Estonia

There is a lack of facade design methods for early design stages to balance thermal comfort and daylight provision that consider the obstruction angle as an independent variable without using modeling and *** paper aims to develop easy-to use solar radiationbased prediction method for the design of office building facades(i.e.,design parameters:room size,window-to-floor ratio,and glazing thermal/optical properties)located in urban canyons to balance daylight provision according to the European standard EN 17037:2018 and thermal comfort through specific cooling *** used a simulation-based methodology that includes correlation analyses between building performance metrics and design parameters,the development of design workflows,accuracy analysis,and validation through the application of the workflows to a new development office building facades located in Tallinn,*** validation showed that the mean percentage of right/conservative predictions of thermal comfort classes is 98.8%whereas for daylight provision,it is higher than 75.6%.The use of the proposed prediction method can help designers to work more efficiently during early design stages and to obtain optimal performative solutions in much shorter time:window sizing in 73,152 room combinations in 80 s.

关键词： Cooling sizing cold climate Solar access Daylight Viewout Windowsizing

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