Análise da performance lumínica de tubos de luz natural em ambientes de cozinha

Analysis of the lighting performance of natural light pipes in a kitchen environment

Abstract

Natural light pipes provide positive impacts on the indoor environment with improved lighting performance. These may be incorporated into housing developments as a way to meet the lighting needs of kitchen environments, which have a high demand for lighting. In this way, the objective of this research was to analyze the luminous performance of natural light pipes in a kitchen environment, in Vitória - ES. For this, the methodology was divided into three stages: definition of reference models for natural light pipes and kitchen environment; definition of ten models of natural light pipes applied to a kitchen model; definition of parameters for simulations and ALNe and IULN metrics. The simulations were carried out in the Troplux 8 software, in which the models were divided into three analysis groups: Group 01 (system with a 1.2 m long pipe, without elbow and inclinations of 37°, 69° and 103°), Group 02 (system with a 1.2m long pipe, with elbow and inclinations of 37°, 69° and 103°) and Group 03 (system with a 1.65m long pipe, with elbow and inclinations of 0°, 39 °, 69° and 101°). The results showed that the inclination of the natural light pipes exerted a greater influence on the variation of lighting in the indoor environment than the length of the pipe and the addition of elbows, in which models with a lower inclination (0°, 37° and 39°) had the worst results. On the other hand, the 27.28% increase in the length of the pipe caused an insignificant decline in natural lighting. It was also found that the addition of a elbow, in natural light pipes of the same inclination, contributed with up to 20% improvement in the luminous performance of the internal environment.