Análise da fatura de energia elétrica com utilização de geração própria e ajuste de contrato de demanda para um consumidor industrial

Abstract

The present work aimed to propose energy efficiency measures for an industry of the fiberglass reinforced plastic sector, Tecniplas. Using the consumption history of one year and energy demand, a study was conducted for tariff adequacy in modality, group and subgroup. In the sequence, an optimized value for the demand contract was calculated. A theoretical sizing of a photovoltaic system to supply the entire consumption of the industry was also performed. The results obtained show that the company is already framed in the best tariff modality (green seasonal), and that the optimized demand contract achieves a reduction of 17.60% per year in the demand share. The theoretical sizing of the installation of photovoltaic minigeneration, with consequent use of economic indicators (discounted payback (PBd), internal rate of return (IRR) and net present value (NPV)) for analysis of economic feasibility, showed feasibility for its installation, since values of IRR and NPV were found respectively equal to 21.08% and R$ 166,853.75, exceeding the values estimated for minimum rate of attractiveness (13%). For the PBd the result showed that in the eighth year of the project (if implemented) the point of financial equilibrium will be reached. The conclusions of this study show that it is possible to reduce electricity costs through the application of energy efficiency, having as a focal point a new demand contracting and the implementation of a source of distributed photovoltaic generation sized to supply 100% of its consumption.