Contribution of the Measurement Uncertainty of the Daylight Factor in Buildings for the Comparison of Experimental Methods |
|---|
| António Santos, Álvaro Silva Ribeiro, Luís Lages Martins |
- Abstract:
- Lighting has a major role to environmental comfort and energy efficiency in buildings, being related to parameters that establish comfortable visual environment suitable for the execution of visual tasks. The lighting of interior spaces can be accomplished using natural light, artificial light or, preferably, using a combination of the two. The measurement of Daylight Factor (DF) is required as a quantity to characterize the indoor luminous environment in buildings. The measurement of lighting conditions is usually carried out taking into account the recommendations and the reference illuminance levels contained in Standards EN 12464-1 [1], providing the conditions to indoor electric lighting, and EN 17037 [2], providing the framework of daylight in buildings, being still under evaluation to accomplish a wide variety of real scenarios. Although the characterization of artificial lighting conditions is relatively common, the systematic “in situ” assessment of daylighting conditions still has to solve the differences arising from the use of different available methods and the impact of external obstructions in the accuracy, and the suitability of the experimental approaches. In this paper, the evaluation of measurement uncertainty related with the Daylight Factor, obtained using four different experimental methods is developed and a comparison of the accuracy of the methods results is given, providing a tool to validation and to support decision-making processes.
- Keywords:
- Daylighting; daylight factor; buildings; measurement uncertainty
- Download:
- IMEKO-TC10-2020-046.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC10
- Event name:
- TC10 Conference 2020 (ONLINE)
- Title:
17th IMEKO TC10 Conference "Global trends in Testing, Diagnostics & Inspection for 2030” (2nd Conference jointly organized by IMEKO and EUROLAB aisbl)
- Place:
- Dubrovnik, CROATIA
- Time:
- 20 October 2020 - 22 October 2020