Estudo preliminar sobre a utilização do sistema biodigestor-gerador para suprimento total ou parcial da energia elétrica do campus Medianeira da UTFPR

Abstract

The increase in consumption of electric energy and amounts charged on electricity bills, added to the government policy to mitigate environmental damage generated from non-renewable energy sources, has encouraged consumer units to increase their energy efficiency by seeking tariff adjustments and self-generation systems from renewable sources. The present work consists in the characterization of the electricity consumption profile of the Universidade Tecnológica Federal do Paraná’s Campus Medianeira, and in the creation of 32 scenarion of electrical self-generation from biogas. The consumption profile was built with data from the electricity bills from the year 2019 and the scenarios were planned for different operating settings and portions of electricity consumption reduction. The scenarios were used for the dimensioning of the electric generation system and determine the daily volume of biogas needed. The results show the annual savings in the electricity bill that each scenarion can provide, as well as their minimum volume of biogas to be produced daily, and also the maximum investment that can be made in the generation plant for 4 different payback period times. The result also show the Net Present Value (NPV) of each proposed scenario to assist the administrator’s decision on project acceptance. It’s concluded that the real survey of the actual biogas production is a determining factor to characterize the technical feasibility of this work, also that the investor profile – occupied by the campus administrator – will determine the maximum amount invested in a generator-biodigestor group to supply total or partial the electric energy, as this choice will depend on the desired payback and NPV.