Abstract
The energy used by buildings occupies 38% of the entire energy usage in Korea, of which lighting consumes 22% in considerable amount. Accordingly, various tests and researches to reduce energy consumed by buildings, especially consumption of indoor lighting energy have been constantly carried out. This study has suggested a light shelf system applied with user awareness technology and lighting dimming control system on the basis of light shelf system, user awareness technology and lighting control, and verified energy reduction efficiency by comparing results of energy reduction performance evaluation for the suggested light shelf. In order to verify energy reduction of the suggested system, a test bed has been utilized, energy consumptions have been calculated for 3 types including user unawareness and lighting On/Off control light shelf system, user awareness and lighting On/Off control light shelf system, user awareness and lighting dimming control light shelf system, and users have been set to User A, User B, and User C for family members of 60s, 40s, and 10s. The results are shown below. 1) Lighting energy consumption for user awareness technology and lighting On/Off control applied movable type light shelf system showed 105%, 55%, and 20% for User A, User B, and User C comparing to user unawareness and lighting On/Off control applied $0^{\circ}$ fixed light shelf system and in the case of User A, it has increased energy usage and is inappropriate. 2) Lighting energy consumption for user awareness technology and lighting dimming control applied movable type light shelf system showed %, 13%, and 6% for User A, User B, and User C comparing to user unawareness and lighting On/Off control applied $0^{\circ}$ fixed light shelf system, and allowed efficient energy reduction. This study is significant from an aspect that it has suggested an alternative to energy shortage problem by applying user awareness technology and lighting control technology and verifying effectiveness of energy reduction in order to improve lighting performance and energy efficiency of the light shelf.
