Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


Potential for virtual daylight sensor using daylight simulation and high-resolution measurement of solar radiation

Sara Gilani, William O’Brien

Abstract: Workplane daylight illuminance is a commonly-used predictor of occupants' operation of shading devices and lighting in buildings. However, it is impractical to avoid potential obstructions in long-term measurements of desktop sensors. The objective of this paper is to assess the practicality and accuracy of using simulation-based indoor illuminance predictions based on the local high-resolution global solar radiation. To this end, the indoor illuminance in an office was measured. The high-resolution global solar radiation was measured in a local weather station. The indoor illuminance was predicted using RADIANCE-based daylight simulation tool DAYSIM. The results show that the absolute error of 50% of the corresponding measured and calculated indoor illuminance were lower than 32%, 30%, and 44% for points 1, 2, and 3, which were located in the middle of the test office width at 3, 2, and 1 m away from the window, respectively. The minimum effect of the surface reflectance on the RMSE of the difference between the measured and calculated illuminance was observed at point 1.
Pages: 560 - 569