NATURAL LIGHTING IN GREEN BUILDINGS-AN OVERVIEW AND A CASE STUDY

摘要

India is an energy deficient country. The energy produced by various means is not sufficient to meet out the demand. The only proactive route for survival is to save energy. The daylight is the primary source of lighting in building to save electricity. In typical buildings, lighting accounts for 25-40% energy consumption. Fortunately during the last quarter of the 20th Century, architects and designers have recognized the importance and value of introducing natural light in buildings. Most people appreciate daylight and also enjoy the outside view that windows provide. Good day-lighting design can result in energy savings and can shift peak electrical demand during afternoon hours when daylight availability levels and utility rates are high. The object of this paper is to develop a scientific, engineering and economical integration of day-lighting concepts into the building design. This paper promotes daylight conscious building design by saving energy through greater utilization of natural light, while at the same time improving visual comfort and control of solar gains. As a case study, the various data available in rural region of Karaikal were collected and analysed to show the use of day lighting for buildings are also highlighted.