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Abstract
Various researches have been made for light shelf as the efficiency has been recognized in the aspect that it induces reduction of lighting energy as it allows natural lights deep into indoor through reflection. However, the existing researches relating to light shelf did not play the role of basic data when designing light shelves for various sizes of indoor spaces as they have mostly dealt with factors of simple light shelves. Thus, this study aims to draw optimal solution for light shelf and correlation with depths of spaces by conducting performance evaluation in consideration of factors of depth of space and light shelf and to establish basic data for designing light shelves based on the result. As the result, it has been drawn that the standard of the optimal light shelf for depth of space is a light shelf with 0.3m width and adjustable angle, and this is meaningful in the aspect that it is the result through the factor which is the depth of indoor space where the occupant is located.
Key Words: Depth, Light Shelf, Performance Evaluation, Energy Saving
1. Introduction
Light shelves have been suggested as the solution for reducing lighting energy as its efficiency has been recognized for the system allowing exterior natural lights deeply into indoors through reflection. However, the previous researches have been carried out focusing on performance evaluation for the factors relating to the performance of light shelves with fixed size of space. Recently, due to introduction of the concept of flexibility of interior space together with various types of spaces resulting from the needs of residents, the size of interior space is not fixed but rather flexible in various forms, which requires changes in the existing researches focusing on factors of light shelves. Thus, this research aims to draw optimal solution for Light Shelf through performance of light shelves for the various sizes of spaces and, based on such result, to be utilized as the basic data for designing light shelves.
2. Light Shelf and Recommended levels of illumination
A Light Shelf is a natural lighting system which brings natural lights flowing into indoors deeply into indoor space through reflections from reflection plane of the Light Shelf and ceiling surface, and at the same time...