Exergetic evaluation of corn-ethanol production in China

被引：75
|
作者：
Yang, Q. [1 ]
Chen, B. [2 ]
Ji, Xi [1 ]
He, Y. F. [1 ]
Chen, G. Q. [1 ]
机构：
[1] Peking Univ, Netl Lab Turbulence & Complex Syst, Dept Mech, Beijing 100871, Peoples R China
[2] Beijing Normal Univ, State Key Joint Lab Environm Sci & Pollut Control, Fac Environm, Beijing 100875, Peoples R China
来源：
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION | 2009年 / 14卷 / 05期
基金：
北京市自然科学基金;
关键词：
Corn-ethanol; Exergy; Renewable energy; Ecological thermodynamics; RESOURCE ANALYSIS; NET ENERGY; BIOETHANOL PRODUCTION; CHEMICAL EXERGY; BIO-ETHANOL; FUEL; ECONOMICS; BALANCE; EMERGY;
D O I：
10.1016/j.cnsns.2007.08.011
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
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. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：2450 / 2461
页数：12
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