Economic analysis of an automated lighting system with presence sensor at a state school in the city of Manacapuru-AM

This work addresses the consumption of electricity in a state school in the interior of Amazonas, highlighting the importance of the search for available technologies to reduce energy consumption. In this context, the main objective of this study is to demonstrate the energy costs in the lighting system of a state school in the city of Manacapuru, and also to analyze economically the feasibility of an automated lighting system with presence sensor in classrooms. Since, the lighting of the classrooms is manual and depends exclusively on the need for a public servant to turn on and off the switches, thus, the energy consumption of the luminaires and the time in which the exacerbated consumption occurs directly affects the energy bills of the place. In the development of research, it was found that the use of presence sensors would result in both financial savings and an environmental issue. The results showed that it is possible to have a saving of 31.43% in the value of energy compared to the value currently paid. Therefore, the amount of the investment that costs R$ 1.998,00 would be paid in two and a half months. This way, it would contribute to the useful life of the lamps and thus avoid their early disposal, thus avoiding an environmental impact because the replacement and disposal of these materials are usually very harmful to the environment