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Energy, exergy, environmental and economic analysis of hybrid waste-to- energy plants

机译：混合垃圾发电站的能源，火用，环境和经济分析

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Recently, studies have been evaluating the thermodynamic performance of new configurations of integrated waste-to-energy/gas turbine cycles, but a question still remains: "Instead of building new natural gas power plants or installing conventional waste-to-energy facilities, should one be investing in flexible efficient hybrid plants?" This article aims at presenting a novel comprehensive approach to help answering this question. The strategy intends to demonstrate how to integrate four known key procedures (energy, exergy, economic and environmental analysis) in an original manner in order to evaluate the feasibility of such systems. The technique consists of a conventional Energy-Exergy analysis followed by a new Environmental-Economic approach. The novelties are in the economic and environmental parts, namely: (i) the use of multiple cost equations for estimating the plant's initial investment range and (ii) the indirect estimate of the pollution abatement system cost through an energy-ecological efficiency indicator. A case study configuration (similar to the existing plant of Bilbao) is used as exercise to demonstrate the method and its comparability potential, as well as to allow discussion using tangible results. The case-studied plant has a power output capacity of 107 MWe, thermal efficiency of 36%, ecological efficiency of 89%, thermal waste input capacity of 155 MWt and levelized cost of electricity production of US$ 64-89 per MWh. It is compared to several existing single-fueled waste-to-energy facilities and other energy sources, including renewable and non-renewable. As unique findings of this research, it is shown that the proposed economic method allows to predict costs quite accurately and that the specific investment costs of such technology are very attractive compared to existing single-fueled waste-to-energy facilities in Europe and other electricity sources in the Brazilian context. The proposed method proved to be a comprehensive procedure to analytically evaluate the feasibility of hybrid waste-to-energy power plants, which present good potential in the Energy conversion field.
机译：最近，研究一直在评估新的废物-能源/燃气轮机集成循环新配置的热力学性能，但是仍然存在一个问题：“不是建造新的天然气发电厂或安装常规的废物-能源设施，是否应该投资于灵活高效的杂交植物？“本文旨在提出一种新颖的综合方法来帮助回答这一问题。该策略旨在演示如何以原始方式集成四个已知的关键程序（能源，能动，经济和环境分析），以评估此类系统的可行性。该技术包括常规的能量-能量分析和新的环境-经济方法。新颖之处在于经济和环境方面，即：（i）使用多个成本方程式估算工厂的初始投资范围，以及（ii）通过能源生态效率指标间接估算污染消除系统的成本。案例研究配置（类似于毕尔巴鄂的现有工厂）用作练习，以演示该方法及其可比性，并允许使用实际结果进行讨论。该案例研究的工厂的发电能力为107 MWe，热效率为36％，生态效率为89％，热废物输入能力为155 MWt，平均发电成本为64-89美元/ MWh。将其与几个现有的单燃料废物转化能源设施和其他能源（包括可再生和不可再生能源）进行比较。作为这项研究的独特发现，表明拟议的经济方法可以相当准确地预测成本，并且与欧洲现有的单燃料废物发电设备和其他电力相比，这种技术的特定投资成本非常有吸引力。在巴西背景下的资源。所提出的方法被证明是一种综合方法，可用于分析性地评估混合型废物-能源发电厂的可行性，这在能源转换领域具有良好的潜力。

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