Institute for Energy Engineering, Technische Universität Berlin, Germany.
Environ Sci Technol. 2012 Mar 6;46(5):3001-7. doi: 10.1021/es203430b. Epub 2012 Feb 22.
Carbon capture and storage (CCS) from power plants can be used to mitigate CO(2) emissions from the combustion of fossil fuels. However, CCS technologies are energy intensive, decreasing the operating efficiency of a plant and increasing its costs. Recently developed advanced exergy-based analyses can uncover the potential for improvement of complex energy conversion systems, as well as qualify and quantify plant component interactions. In this paper, an advanced exergoenvironmental analysis is used for the first time as means to evaluate an oxy-fuel power plant with CO(2) capture. The environmental impacts of each component are split into avoidable/unavoidable and endogenous/exogenous parts. In an effort to minimize the environmental impact of the plant operation, we focus on the avoidable part of the impact (which is also split into endogenous and exogenous parts) and we seek ways to decrease it. The results of the advanced exergoenvironmental analysis show that the majority of the environmental impact related to the exergy destruction of individual components is unavoidable and endogenous. Thus, the improvement potential is rather limited, and the interactions of the components are of lower importance. The environmental impact of construction of the components is found to be significantly lower than that associated with their operation; therefore, our suggestions for improvement focus on measures concerning the reduction of exergy destruction and pollutant formation.
从发电厂捕获和储存（CCS）二氧化碳可以用来减轻化石燃料燃烧产生的二氧化碳排放。然而，CCS 技术需要大量能源，降低了工厂的运行效率并增加了成本。最近开发的先进基于火用的分析方法可以揭示改善复杂能量转换系统的潜力，以及对工厂组件之间的相互作用进行定性和定量分析。在本文中，首次使用先进的火用环境分析来评估带有二氧化碳捕获的富氧燃烧电厂。将每个组件的环境影响分为可避免/不可避免和内生/外生部分。为了尽量减少工厂运行的环境影响，我们专注于影响的可避免部分（也分为内生和外生部分）并寻求减少它的方法。先进的火用环境分析的结果表明，与单个组件的火用破坏相关的环境影响的大部分是不可避免的和内生的。因此，改进的潜力相当有限，组件之间的相互作用也不太重要。发现组件的建设的环境影响明显低于与它们的运行相关的环境影响；因此，我们的改进建议主要集中在减少火用破坏和污染物形成的措施上。
