Moreira, Micheline Damião DiasVital, Márcia Maria Borges de Brito2021-09-222021-09-222021-09-10VITAL, Márcia Maria Brito de Borges. Análise da viabilidade de automação em sistemas de climatização a partir do uso de sensores de presença. Estudo de caso: Setor de aulas IV da UFRN. 2021. 72f. Trabalho de Conclusão de Curso (Graduação em Engenharia Civil) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2021.https://repositorio.ufrn.br/handle/123456789/37399Brazil is currently going through an energy crisis as a result of facing the biggest water crisis of the past 91 years, according to the National Electric System Operator (ONS, 2021). Since hydroelectric power stations are the main generators of electricity in the country, there is a need to take measures to minimize waste during energy consumption. In this context, the objective of this work was to evaluate the feasibility of implanting presence sensors in the HVAC system of classrooms in the classroom sector IV of the Federal University of Rio Grande do Norte (UFRN), aiming at reducing environmental impacts and also the electricity bill, which currently has an average monthly consumption of 133,261.83 kWh only by air conditioners, which is equivalent to an average cost of R$ 63,113.31/month. The total investment required for the implementation of the proposed automation system is R$ 41,734.38 and the payback period for this investment is approximately 10 months, providing an average energy savings of R$ 4,207.55/month or savings in life cycle of R$ 50,490.65/year. Finally, using technology as the main ally to minimize waste during energy consumption is the smartest way to save and help the environment.Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/AutomaçãoAutomationSensores de PresençaPresence SensorsAr condicionadoAir conditioningbachelorThesis