Análise energética de plantas convencionais de cogeração aplicadas a indústria sucroalcooleira

Abstract

Face with the search for alternative sources of energy, cogeneration from sugarcane bagasse, a result of the sugar and / or alcohol manufacturing process, is an option that offers a series of advantages, especially in Brazil, one of the world's largest sugar and ethanol producers. Although the great potential, cogeneration plants in the sugar and alcohol industry still operate below their technical potential,and this work aims to perform the energy analysis of conventional cogeneration plants in sugarcane plants through the application of the principles of the First Law of Thermodynamics as well as the performance factors of each of them, relating the parameters of operation with the efficiency of the cycles and the equipment that composes them. The modeling of the equations was performed with the aid of software EES (Engineering Equation Solver). It was possible to observe that conf. 1 consumes more energy to produce 1 kW of electrical and / or mechanical energy, but higher cogeneration efficiency and lower thermal efficiency. Already conf. The highest energy energy index when operating at 2100 kPa and 300 ° C, and produces more surplus electric power than conf. 1. Configuration 3 was created as the most complete electric produced, producing 27% of the conf. 1 and 12% than a conf. 2. Production of surplus three sides increased, as the moisture content of the bagasse decreased.