1 minute read
Visual Comfort
from Technical Report
by Phil Win
In the design of the main workshop area, we have to evaluate the natural lighting which is received via the ceiling skylight strip and frosted glass panels. We must determine whether this light alone is sufficient for daytime work.
Left: Internal Surface Drawing of workshop space
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Below: External image of workshop area
Daylight Autonomy Simulation - Internal Image showing spaces just under the required 50% threshold
Daylight Autonomy Simulation - Plan Image showing spaces just under the required 50% threshold
Visual Comfort
Having run a daylight autonomy simulation on DIVA, the simulation report confirms to us that only 13% of the floor area would receive 500lux (UK Standard) of light, 50% of the time.
However, if we view each square metre of space in the images above, we learn that the lighting is not far off the requirements. The lighting reaches 500 lux around 30%- 40% of the time. Furthermore, the mean daylight factor of 3.2% is acceptable. However this must be factored in against building performance as well as glare.
An updated simulation explores the addition of extra north facing skylighting. With this updated calculation, 78% of the floor area would receive 500lux (UK Standard) of light, 50% of the time.
Internal Image showing effectiveness of lighting openings
Internal Image showing effectiveness of lighting openings with the addition of extra rooflights
