La dinamica de la llum. Visio i control de la il·luminacio en l'oficina
- Autores: Eulàlia Cunill de la Puente
- Directores de la Tesis: Rafael Serra Florensa (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2009
- Idioma: español
- Tribunal Calificador de la Tesis: Michael Wilson (presid.), Helena Coch Roura (secret.), Ramon San Martín Páramo (voc.), Aldo Fanchiotti (voc.), Alessandro Rogora Bellido (voc.)
- Materias:
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- Resumen
Lighting in present-day offices is a combination of natural and electric lighting. It has been understood that lighting control systems can adjust both natural and electric light in what is known as daylight linking or an integrated lighting control system. However, many questions have been raised in the light community about the success of lighting controls in buildings, which are often associated with maintaining constant levels of illumination (Lux), that is to say standard conditions. This suggests that the current approach to daylighting control systems may not lead to a satisfactory response. This thesis investigates the general hypothesis that daylighting is a dynamic phenomenon and thus it needs to be controlled, considering the parameters that define its quality according to subjects perceptions.
To test this hypothesis, the research follows two lines. The first is an experimental line based on post-occupancy evaluation, investigating if what the current lighting controls are measuring is sufficient to be working good. Afterwards, illuminance, luminance, colour reflectance and colour temperature perceived were tested as parameters, possibly determining the quality of lighting in interior workplaces. The second is a theoretical approach investigating the dynamics of light in such spaces based on the variation in time and space of the light sources and the receiver. The results of the field study tend to support the general hypothesis. The findings show that in the case of open plan offices in the United Kingdom, most of the daylight linking systems are disconnected or not working properly due to the inconsistancy/uncertainty of what to measure. It was tested that the maintained horizontal illuminance does not determine subjects satisfaction. The results support the notion that under certain changing lighting conditions, the relationship between lighting parameters, such as luminance and colour temperature perceived, is what defines the quality of light, together with subjects satisfaction. In the investigation, these quality parameters were included in the proposal of a dynamic equation of visual comfort and in a new daylight linking control solution.
This thesis explores visual comfort and develops procedures to integrate lighting control systems in architecture. From the initial approach to lighting and the results, conclusions are obtained that can be extrapolated to other comfort variables in buildings.
