Utilização de três sistemas de microgeração a partir do biogás para compensação de energia elétrica em duas agroindústrias no Sudoeste do Paraná

Abstract

Due to the increasing demand for electrical energy in the industrial sector, it is necessary to seek ways to reduce expenses associated with energy bills. The consumer unit that operates animal confinement facilities implemented the use of two biodigesters responsible for injecting all the energy produced into the electrical grid and compensating in its industries. This work aimed to analyze the savings achieved for two industries in the food sector through the use of microgeneration systems using biogas and to simulate the participation of a third biodigester in order to compensate for all the energy consumed during off-peak hours for the industries. To conduct the analyses, it was necessary to develop a spreadsheet containing all the data on generation, consumption, and credits generated by each generator group and used by each corresponding industry. The results obtained for the study period (from April 2022 to March 2023) demonstrate that Industry 1 achieved savings of 65.30%, while for Industry 2 it was 66.56%. A simulation was also carried out for the case where the third biodigester was already installed and operational. The projected savings for the next 12-month period would be approximately 84.97% for Industry 1 and 91.33% for Industry 2, considering compensation only during off-peak hours. If the compensation were to occur for all energy (during peak and off-peak hours), Industry 1 would achieve savings of 96.55%, while Industry 2 would achieve 96.65%. The financial indicators show promising values, indicating that the project is economically viable, with a payback period of 5.09 years for biodigester 1 and 7.35 years for biodigester 2, being a viable and advantageous alternative for the property under study.