Eficiência energética em ambientes comerciais: economia financeira gerada por meio de automação em sistema de climatização e aproveitamento de águas pluviais

Abstract

This Final Undergraduate Project aimed to analyze the technical and economic feasibility of implementing sustainable solutions in a commercial environment through the automation of air conditioning systems and the reuse of rainwater. The study was conducted at a convenience store attached to a fuel station located in Maceió, Brazil. For climate control, smart devices with internet-based remote control (IoT) and energy meters were installed to record electrical consumption before and after automation. The results showed an average reduction of 17% in total energy consumption, particularly for the three-phase unit, which achieved the highest savings. Regarding rainwater harvesting, the Netuno 4 software was used to simulate the capture, storage, and use of rainwater in a future car wash. The catchment area was dimensioned based on the existing roof, applying appropriate runoff coefficients and estimated water demand. The economic feasibility analysis revealed a payback period of only 7 months, a Net Present Value (NPV) of R$ 25,479.05, and an Internal Rate of Return (IRR) of 15.69% per month. The results confirm that both solutions are technically and financially feasible, significantly reducing operational costs and contributing to the sustainability of commercial enterprises.