Développement d'une séquence de contrôle pour stores motorisés à l'aide de simulations de l'éclairage naturel

Abstract

Daylighting is a passive energy that must be used in buildings. It offers a stimulating and pleasant work environment. In addition, it contributes to occupant productivity and helps to reduce absenteeism at work. However, it is shown that daylighting can create some visual discomfort because of glare and high brightness contrasts. In order to limit these effects, the contribution to daylighting must be controlled with the use of shading devices. The use of simulation tool such as Radiance makes it possible to simulate the level of luminosity in a room to evaluate the impact of these devices. This study proposes to develop a control sequence for motorized blinds using simulations of the level of luminosity for one section, section R1, of the atrium of the Maison des étudiants de l’École de technologie supérieure. The atrium is modeled with SketchUp and the 3D model is calibrated using measured data on site for three heights (positions) of blinds: 7.15 m (Hsm1), 4.47 m (Hsm2) and 2.72 m (Hsm3). For the calibrated model, the mean squared error (MSE) (lux) and the relative mean squared error (relative EQM) (%) range from 432 lux to 12 835 lux and 14 % to 35 % for the Hsm1 position, between 761 lux to 19 727 lux and 6 % to 30 % for the Hsm2 position and between 405 lux to 17 780 lux and 9 % to 23 % for the Hsm3 position. Subsequently, visual comfort is assessed using Useful Daylight Illuminance (UDI) and Spatial Daylight Autonomy (sDA). These measurements make it possible to select for the section R1 of the atrium, the application zone, among eight studied zones, where the control sequence will be applied. The selected application zone (zone GA) achieves UDI (sDA) values of 31 % (77 %) for position Hsm1, 40 % (74 %) for position Hsm2 and 46 % (71 %) for position Hsm3. To develop the control sequence, the hourly values of the acceptable solar radiation are determined for each month, between 8:00 and 14:00, at the moment when the level of simulated level of luminosity in the room exceeds 3000 lux. The values are determined for the positions Hsm1, Hsm2 and Hsm3. With the use of the control sequence for the GA zone, between 8:00 and 11:00, there is a risk that the level of luminosity will exceed 3000 lux. However, between 11:00 and 14:00, there is no risk that the level of luminosity exceeds 3000 lux.

Date	12 Jun 2018
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Danielle Monfet (Supervisor)