ESTUDO DE CASO DE ESTRATÉGIAS VISANDO O AUMENTO DE EFICIÊNCIA ENERGÉTICA EM INDÚSTRIAS DE BENEFICIAMENTO DE GRÃOS NO SUDOESTE GOIANO

Abstract

World population growth, technological and economic development, as well as the, common access to technology, are some of the factors that have influenced the increase in demand for electricity worldwide, which is no different in Brazil. However, this increase has become more evident, leading to a lack of follow-up on the energy supply side. This has a direct influence on the increase in the tariffs charged by the electric power generation and distribution concessionaires. This work aimed to study three strategies to increase energy efficiency in two grain processing industries (large and small) in the city of Rio Verde being them: the optimum demand study through the MACDE web tool, which proposed an optimum demand for the largest sowing of 1309 kWh and for the smallest of 209 kWh; the possibility of own generation at peak hours by sizing a generator motor group compared to an offgrid photovoltaic system with the same potential, seeking to verify which system is technically and economically viable to partially replace the electric energy use by the concessionaire at peak hours, where the electric energy was reached with the possible investment in the photovoltaic system in the order of R$ 8.22/kWh for the larger industry and R$ 9.04 /kWh for the smaller industry. For dimensioning the generator motor group this value is of R$ 1,44 / kWh for the largest industry and R$ 1,88/kWh for the smallest industry. And finally, to evaluate the possible reduction in energy consumption in the biggest industry, studying the electric energy savings and consequently the possible financial savings, when adopting the substitution of fluorescent lamps by LED lamps, as well as the substitution of the inverse air conditioning systems for VRF systems. Thus, estimating a saving in electric energy consumption of 146.16 kWh per month which is equivalent to R$78.84 per month (R$ 946.08 per year) in the substitution of light bulbs, and a possible saving of 1400.09 kWh per month equivalent to 16801.08 kWh per year which financially represents a possible saving of R$756.05 per month consequently R$ 9,072.58 per year when replacing the air conditioning system.