Extended exergy accounting applied to biodiesel production
Extended exergy accounting applied to biodiesel production
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DOI：
10.1016/j.energy.2010.03.015
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发表时间：
2010-07
期刊：
影响因子：
9
通讯作者：
L. T. Peiró;G. Méndez;E. Sciubba;X. G. Durany
中科院分区：
文献类型：
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作者：
L. T. Peiró;G. Méndez;E. Sciubba;X. G. Durany
在评估生物燃料等可再生能源的生产时，有必要将资源投入、资本、劳动力投入和环境修复成本纳入评估。扩展火用核算（EEA）是一种系统分析方法，它根据详细的质量和火用平衡，计算获得产品或服务所需的主要火用资源的总量。EEA的概念新奇表现在它还包括以同质单位（焦耳）衡量的外部性（资本，劳动力和环境影响）。作为EEA的一个例子，我们评估和比较了从使用过的食用油（UCOME）和油菜籽作物（RME）生产1吨生物柴油。UCOME和RME的扩展火用“含量”分别为51.90GJ和77.05GJ。UCOME的生产比RME少使用25.15GJ的资源（材料和能源），需要更低的总投资和环境修复成本。另一方面，UCOME需要增加35%的工作时间。总之，UCOME的扩展火用约为RME的扩展火用含量的1.5倍。因此，我们可以得出结论，从UCO生产生物柴油的资源使用密集度低于从RME生产。
When evaluating the production of renewable energies such as biofuels, it is necessary to include in the assessment the resource inputs, capital, labor investment and environmental remediation costs. Extended Exergy Accounting (EEA) is a system analysis method that calculates, on the basis of detailed mass and exergy balances, the total amount of primary exergy resources necessary to obtain a product or service. The conceptual novelty of EEA is represented by the fact that it also includes externalities (capital, labor and environmental impact) measured in homogeneous units (Joules). As an illustration of EEA, we assess and compare the production of 1 ton of biodiesel from used cooking oil (UCOME) and rapeseed crops (RME). The extended exergy “content” of UCOME and RME are 51.90GJ and 77.05GJ respectively. The production of UCOME uses 25.15GJ less resources (materials and energy) and requires lower total investments and environmental remediation costs than that of RME. On the other hand, UCOME requires 35% more workhours. In summary, the extended exergy of UCOME is about 1.5 the extended exergy content of RME. Thus, we can conclude that biodiesel production from UCO is less resource use intensive than the production from RME.