![]() ![]() ![]() Such lighting systems are composed of energy efficient luminaires and daylight control, offering additional savings due to the natural light entering the building. Nowadays lighting systems in so-called smart buildings are optimised to ensure the minimum energy consumption. It is common knowledge that lighting contributes to more than 30% of the total energy consumption of a building. The information obtained from the calculations is useful for investors, future tenants and environmentalists. The major advantage of the proposed approach is to determine energy savings during the design stage of a building, not after the building construction or retrofitting. In the final stage photometric calculations are performed, and energy savings are calculated. In the second stage the calibration of room properties is carried out. In the first stage an optical sensor is evaluated for its P (power)-E (illumination) response characteristics. The technique is divided into three stages. The technique is designated to be used in smart buildings or similar applications where daylight harvesting is welcomed. This publication presents a technique of quantifying energy savings due to daylight. Keywords: Interior Lighting ELS Sensor Energy Savings CO 2 Emissions ETAP Appliances 1Department of Electrical and Computer Engineering, The University of Auckland, Auckland, New ZealandĢThe Open Polytechnic of New Zealand, Lower Hutt, New ZealandĮmail: Septemrevised Novemaccepted November 12, 2012 ![]()
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