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RESUMO:O foco deste trabalho consiste num estudo de caso referente a uma Auditoria Energé-tica efetuada numa agroindústria de laticínios localizada na cidade de Guaíra, Extremo-Oeste paranaense. Neste contexto, o presente artigo teve por objetivos: efetuar uma auditoria energética de suas instalações, analisando o consumo de energia elétrica associado aos processos produtivos, sistemas e equipamentos existentes; identificar e quantificar as cargas instaladas na agroindústria, verificando a energia consumida e a potência demandada em cada uma delas; determinar o potencial de conservação de energia para os usos finais existentes na empresa, por meio da identificação de oportunidades para implantação de medidas que otimizassem o uso da energia; e efetuar um estudo de viabilidade econômica que apontasse para a implementação das medidas de eficiência energé-tica. Após a análise das demandas energéticas e dos equipamentos instalados na agroindústria, destaca-se a possibilidade do aumento na oferta de energia elétrica apenas reduzindo-se o desperdício no setor industrial. A análise econômica aponta um payback descontado de 30 meses e Taxa Interna de Retorno de 3,93% ao mês. Com a implantação das intervenções propostas, obtém-se uma redução de 11.490,50 kWh mês -1 (economia mensal de 7,26%). PALAVRAS-CHAVE:eficiência energética, energia elétrica, auditoria energética, redimensionamento energético. ENERGY AUDITING IN A DAIRY AGROINDUSTRIES ABSTRACT:The focus of this research is a case study concerning an Energy Auditing that was conducted in a dairy agribusiness located in the city of Guaira, in the extreme west of the state of Paraná. In this context, this research aimed to: perform an energy auditing of its facilities by analyzing the energy consumption associated with the processes, systems, and existing equipment, to identify and quantify the loads installed in agribusiness, energy consumed and checking the power demanded in each of them and determine the potential for energy conservation for the existing final uses at the company, by identifying opportunities to implement measures thus optimizing the use of energy, and perform an economic feasibility study that aims to implement the energy efficiency measures. After analyzing the energy demands and the equipment installed in the agribusiness, it is highlighted the possibilities of increasing the supply of electricity only reducing waste in the manufacturing sector. The economic analysis indicates a payback of 30 months and Internal Rate of Return of 3.93% per month. With the implementation of the proposed interventions, it is obtained a reduction of 11,490.50 kWh month -1 (monthly savings of 7.26%).

Based on the concept of sustainability, which covers the energy issue as well as its rational use from natural resources, conventional sources do not meet the real requirements of the current production methods. In that context the west region of Paraná state in Brazil presents a vocation for developing projects that involve energy production from alternate sources such as biomass, water, wind energy and solar. Thus, the aim of this research was to verify the behavior of solar and wind sources in the city of Cascavel, Paraná, under different time series of a weather station, subjecting them to quantitative and qualitative analyses of their available energy, by using a statistical approach with Spearman's correlation coefficients (CC). Solar radiation and wind speed were observed. The correlation coefficients used in the analyses of behavior among alternative sources showed weak correlation with independence between variables in all parameters. Solar energy availability was proportionally more representative than wind availability in all periods assessed, mainly between inter seasonal averages.