Imperial College London

DrBenoitChachuat

Faculty of EngineeringDepartment of Chemical Engineering

Reader in Process Systems Engineering
 
 
 
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Contact

 

b.chachuat Website

 
 
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Location

 

609Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Mutran:2020:10.1016/j.apenergy.2019.113978,
author = {Mutran, VM and Ribeiro, CO and Nascimento, CO and Chachuat, B},
doi = {10.1016/j.apenergy.2019.113978},
journal = {Applied Energy},
pages = {1--15},
title = {Risk-conscious optimization model to support bioenergy investment in the Brazilian sugarcane industry},
url = {http://dx.doi.org/10.1016/j.apenergy.2019.113978},
volume = {258},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The past decades have seen a diversification of the sugarcane industry with the emergence of new technology to produce bioenergy from by-product and waste process streams. Given Brazil’s ambitious goal of reducing green-house gas emissions by over 40% below 2005 levels by 2030, it is of paramount importance to develop reliable decision-making systems in order to stimulate investment in these low-carbon technologies. This paper seeks to develop a more accurate optimization model to inform risk-conscious investment decisions for bioenergy generation capacity in sugarcane mills. The main objective is for the model to enable a better understanding of how Brazilian government policies, such as the electricity price in the regulated market, may impact these investments, by taking into account the uncertainty in sugar, ethanol and spot electricity markets and the interdependency between production and investment decisions in terms of saleable product mix. The proposed methodology combines portfolio optimization theory with superstructure process modeling and it relies on simple surrogates derived from a detailed sugarcane plant simulator to retain computational tractability and enable scenario analysis. The case study of an existing sugarcane plant is used to demonstrate the methodology and illustrate how the model can assist decision-makers. In all of the scenarios assessed, the model recommends investment in extra bioelectricity capacity via the anaerobic digestion of vinasse but advises against investment in second-generation ethanol production via the hydrolysis of surplus bagasse. Furthermore, the decision to upgrade the cogeneration system with a condensation turbine is highly sensitive to the electricity price practiced in the regulated market, capacity constraints on the sugar-ethanol mix, and the accepted level of risk. Another key insight drawn from the case study is that recent market conditions have favored a production focused on the sugar business, maki
AU - Mutran,VM
AU - Ribeiro,CO
AU - Nascimento,CO
AU - Chachuat,B
DO - 10.1016/j.apenergy.2019.113978
EP - 15
PY - 2020///
SN - 0306-2619
SP - 1
TI - Risk-conscious optimization model to support bioenergy investment in the Brazilian sugarcane industry
T2 - Applied Energy
UR - http://dx.doi.org/10.1016/j.apenergy.2019.113978
UR - https://www.sciencedirect.com/science/article/pii/S0306261919316654?via%3Dihub
UR - http://hdl.handle.net/10044/1/74514
VL - 258
ER -