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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/25898

Title: Evaluation of daylighting performance in a retrofitted building facade
Authors: Chi Pool, Doris A.
Brembilla, Eleonora
Mardaljevic, John
Keywords: Climate-based daylight modelling
Façade retrofit
Louvred panels
Visual screening
Issue Date: 2017
Publisher: © PLEA
Citation: CHI POOL, D., BREMBILLA, E. and MARDALJEVIC, J., 2017. Evaluation of daylighting performance in a retrofitted building facade. IN: Proceedings of PLEA 2017, Edinburgh, 3rd-5th July 2017.
Abstract: This paper analyses two main renovations of a University building façade retrofit from the viewpoint of annual daylighting improvement. Currently, this building consists of some teaching rooms connected by a hall but it is expected that this arrangement will change in order to accommodate two open-plan spaces for architecture students. The renovated design will increase the height of the North-East windows and introduce shading devices on the South-West facade. These renovations were explored to determine if the internal luminous conditions will maintain adequate levels. Five degrees of visual screening (100, 90, 70, 45 and 34%) and two slats positions (horizontal and vertical) were evaluated in relation to the building with no screens. Climate-based daylight modelling (CBDM) was carried out by using Diva-for-Grasshopper. The study revealed that effectiveness of convergence testing depends strongly on the choice of CBDM metrics employed as a diagnostic – an important consideration when modelling light transfer through louvres. Results recommended using louvred panels with no more than 70% of visual screening as higher percentages decrease useful illuminances over the range 300-3000 lux (UDI-a), to less than 50% of the occupancy time. Furthermore, vertical louvres were better suited to increase UDI-a than horizontal slats.
Description: This paper was presented at PLEA 2017 and is also available at http://plea-arch.org/plea-proceedings/.
Sponsor: Ms. Chi Pool acknowledges the support of CONACYT (Mexico), IUACC (Spain) and Erasmus+; Ms. Brembilla acknowledges the support of the EPSRC and industrial partner Arup (London, UK) and Prof. Mardaljevic acknowledges the support of Loughborough University.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/25898
Publisher Link: http://plea-arch.org/plea-proceedings/
Appears in Collections:Conference Papers (Civil and Building Engineering)

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