| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 767602 | Communications in Nonlinear Science and Numerical Simulation | 2009 | 12 Pages |
The cumulative exergetic method is used in this study to identify the renewability of the total corn-ethanol production in China when capturing all natural nonrenewable resources consumed in the integrated process including agricultural crop production, corn transportation, industrial conversion and waste treatment. A modified exergy-based indicator is thereby proposed to quantify the renewability of corn-ethanol production process. For the conditions prevailing in China, the renewability indicator as suggested by Berthiaume et al. is calculated to be −4.58, denoting the production process is highly nonrenewable. In addition, a novel indicator is also presented to reveal the environmental cost-effectiveness of the corn-ethanol process as supplement to the renewability indicator. Finally, the sensitivity analysis shows that the defined system boundaries, electricity-generation structure of the country, and technological constraints and choices of production process influence the renewability evaluation results.
