Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Exergoeconomic analysis of conventional and advanced cogeneration systems for the Brazilian sugar and alcohol industry
Submission Author:
RAFAEL AUGUSTO SILVA , MG , Brazil
Co-Authors:
RAFAEL AUGUSTO SILVA, Juarez Furtado, José Carlos Escobar Palacio
Presenter: RAFAEL AUGUSTO SILVA
doi://10.26678/ABCM.ENCIT2018.CIT18-0806
Abstract
The use of renewable energy sources is a viable alternative to supply the growing world energy demand. Among these, the lignocellulosic biomass appears with great potential of generation. Therefore, the idea of sugar and alcohol biorefinery emerges as a promising modality of energy utilization. In this paper, a study of case was carried out to compare the conventional model of sugar and alcohol mill, confronting it with various configurations of biorefinery. For a qualitative examination of the generated energy the methodology used was the exergetic analysis of the process. Soon, a technical and economic analysis of the different biorefineries was carried out from the point of view of the 2nd law of thermodynamics. For comparative purposes the paper analyzed a traditional industrial plant that produces sugar, alcohol and electric energy with different productive routes in the biorefinery. In this way, lignocellulosic ethanol in biochemical processes and syngas in a thermochemical process were also defined as plant products. Ethanol is already final product for commercialization, while syngas is the input of BIG-GTCC (Biomass Integrated gasification- Gas turbine Combined cycle). In this article the simulation of each of the processes in the GateCycle software was performed to determine the biomass distribution. Once the simulation was done, different performance indicators were established based on the second law of thermodynamics. Finally, the unitary exergy costs of each configuration were determined. It was possible to quantify the benefits obtained by the implementation of each technology.
Keywords
sugarcane, Biomass, thermodynamic analysis, Exergetic Analysis, Lignocelulosic Ethanol, BIG-GTCC, Biorefinery
