4, v.1Estimativa do consumo residencial de lenha em uma pequena comunidade rural do Município de São João D'Aliança - GO author indexsubject indexsearch form
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Encontro de Energia no Meio Rural


CARPIO, Ricardo Carrasco and LORA, Electo Silva. Estudo abrangente da cogeração no setor Sucro-Alcooleiro. In Procedings of the 4th Encontro de Energia no Meio Rural, 2002, Campinas (SP) [online]. 2002 [cited 18 July 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022002000100068&lng=en&nrm=iso> .

The present work aims to analysis the minimum market price of the surplus electricity in the sugar mills, by assessing whether investments in new equipment to yield surplus electrical energy are economically feasible in comparison to conventional forms of electricity generation. The evaluation will be accomplished by using condensation-extraction turbines with pressures of 4,2 MPa, 6,0 MPa and 8,0 MPa -during the harvest and off season periods- using alternative fuels as the cane straw and the eucalyptus. It will be taken into account the cost of reduction of steam consumption to 400 kg/tc. According to the prices of the thermal equipments (boiler, steam turbine), supplied by the manufacturers and it is also taken in consideration the additional costs regarding piping, assemblies and labor. For the economical analysis, the internal rate of return (TIR) is used as a tool to evaluate the viability of these systems, taking in consideration that BNDES (National Bank of Social Development) will be financing the project. Finally it is determined the best inversion variant, which depends on work pressure and capacity of the mill as well as the minimum sale price of electricity to the grid.

Keywords : Cogeração; indústria açucareira; preço mínimo.

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