Abstract
The energy consumed by the lighting of the buildings represents a not negligible part of the total energy. The use of low-energy luminaires such as LEDs has significantly reduced this consumption, in addition to the reduction of greenhouse gases and the extended life of the lamps. To satisfy the basic principles of optimal lighting system design (i.e., maximizing uniformity and reducing the level of illumination by staying within the required normative range), many researches using optimization algorithms have been conducted with interesting results. This article proposes a multi-objective optimization model integrating the influence of the colors (in particular primary colors), of the different compartments of a room on the level of total illumination of the piece. The reduction of energy consumption is demonstrated by considering a specific model of illumination in which we introduced the reflection factor related to the colors of the surrounding environment. The subsequent use of genetic algorithms (NSGA III) makes it possible to find the optimal coefficient of variation of the LEDs or any other variable luminaires to have the desired energy value while keeping the same comfort for the users. The proposed model is implemented for the case of an office room. The results show an energy savings of up to 39% with red color. Of particular, results are obtained while maintaining regular illumination and changing the color of the pieces.
Highlights
By 2050, our planet will have about 10 billion human beings, some countries including India, Nigeria, the United States, Indonesia, Brazil, Cameroon, just to name few, will see their population grow in a very important way
These results show that the neutral colors give the lowest levels of illumination while the primary red color gives the highest level
It should be noted that all the colors that result from a mixture of a primary color with the red one(let say purple or orange for example), have a high level of illumination but less than that obtained with the red color
Summary
By 2050, our planet will have about 10 billion human beings, some countries including India, Nigeria, the United States, Indonesia, Brazil, Cameroon, just to name few, will see their population grow in a very important way. According to the International Energy Agency, the world’s non-renewable energy reserves ( i.e. fossil and uranium) would give us an autonomy of 80 years of production at the current rate [1]. Such statistics invites us to revisit our consumption patterns or, to rethink how buildings, schools, and homes are built. Novel mind set on our daily habits in consuming energy should be defined. Present statistics reveals that 40% of the total energy produced in Europe is consumed solely by building[2, 3]. While in Africa, this percentage is larger, about 56% [4]
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