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.
Original language | English |
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Title of host publication | Proceedings of 33rd PLEA International Conference |
Subtitle of host publication | Design to Thrive, PLEA 2017 |
Editors | Luisa Brotas, Sue Roaf, Fergus Nicol |
Pages | 3340-3347 |
Number of pages | 8 |
ISBN (Electronic) | 9780992895754 |
Publication status | Published - 2017 |
Externally published | Yes |
Event | 33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017 - Edinburgh, United Kingdom Duration: 2 Jul 2017 → 5 Jul 2017 |
Conference
Conference | 33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017 |
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Country/Territory | United Kingdom |
City | Edinburgh |
Period | 2/07/17 → 5/07/17 |
Keywords
- Climate-based daylight modelling
- Façade retrofit
- Louvred panels
- Visual screening