Energias Renováveis e Eficiência Energética

Planta de Cogeração

Avaliação Termodinâmica e Econômica de Planta de Cogeração a Bagaço de Cana Assistida por Energia Termosolar

The Brazilian sugar and alcohol industry usually operates combined heat power plants (CHP) fueled by sugarcane bagasse. As the sugarcane harvest in Brazil goes from April to December, both factories and power plants are idle for the remainder of the year.

This project studied the possibility of extending the period of operation of bagasse-fueled CHPs by integrating solar heat to the plants. This increases the production of electricity and results in a more stable power supply to the grid in spite of the seasonality of the sugarcane crop.

An additional low-pressure turbine can expand the steam from the outlet of the backpressure turbine to generate electricity when the process is inoperative. This would enable the cycle to operate at full capacity during the off-season. With other design changes, it is also feasible to achieve a higher participation of solar energy in plant operations. Additionally, integrating a sugarcane straw collection procedure can increase the solar-related capacity factor, lowering electricity generation costs. The collection of straw and its cofiring with bagasse is an option to increase exports of electricity to the grid and solar thermal energy can give an additional contribution in that sense.

Parceiros do projeto
  • University of Duisburg-Essen
  • Federal University of Santa Catarina (UFSC)
  • Federal Institute of Santa Catarina (IFSC)
  • Federal University of São Paulo (UNIFESP)
  • Laboratório de Combustão e Engenharias de Sistemas Térmicos (LabCET)

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