An image-based method to evaluate solar and daylight potential in urban areas

Chatzipoulka, Christina (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Compagnon, Raphaël (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Kaempf, Jérôme (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland)

Solar irradiance and illuminance are important renewable resources that can significantly increase buildings’ energy efficiency, associated to solar passive and active techniques and use of daylighting. In addition, it is widely acknowledged that the presence of natural light and some sunlight indoors is essential for inhabitants’ well-being. This paper presents a new method to assess solar and daylight availability in the built environment at different scales. The method is based on two types of images where the mutual obstruction between neighbouring buildings is represented over stereographic projections of the sky vault. The images can be used in two ways, either for the visual assessment of the examined surface(s) or, to be processed as to obtain a series of numeric performance indicators. In both ways, they can be combined with similar projections of the sun path or sky radiance/luminance distributions, for considering locations’ latitude and climate, respectively. To exemplify the use and relevance of the tools, especially at the early-design stages, the method is applied to compare the proposals submitted in a masterplan competition. The five finalists are examined in relation to the performance of their fac¸ades and roofs, as well as their impact on an existing fac¸ade. Last, a targeted analysis showed a good correlation between performance indicators, readily computed by the method, and predicted annual energy demands.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
Institute:
Institut TRANSFORM
Subject(s):
Ingénierie
Publisher:
Delft, The Netherland, 4-7 June 2018
Date:
2018-06
Delft, The Netherland
4-7 June 2018
Pagination:
8 p.
Published in:
Proceedings of the Symposium on Simulation for Architecture and Urban Design, 4-7 june 2018, Delft, The Netherlands
ISBN:
978-1-510-86315-6
External resources:
Appears in Collection:



 Record created 2018-12-04, last modified 2018-12-10

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