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Development of life cycle water-demand coefficients for coal-based power generation technologies

机译:煤基发电技术生命周期需水系数的发展

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This paper aims to develop benchmark coefficients for water consumption and water withdrawals over the full life cycle of coal-based power generation. This study considered not only all of the unit operations involved in the full electricity generation life cycle but also compared different coal-based power generating technologies. Overall this study develops the life cycle water footprint for 36 different coal-based electricity generation pathways. Power generation pathways involving new technologies of integrated gasification combined cycle (IGCC) or ultra supercritical technology with coal transportation by conventional means and using dry cooling systems have the least complete life cycle water-demand coefficients of about 1 L/kW h. Sensitivity analysis is conducted to study the impact of power plant performance and coal transportation on the water demand coefficients. The consumption coefficient over life cycle of ultra supercritical or IGCC power plants are 0.12 L/kW h higher when conventional transportation of coal is replaced by coal-log pipeline. Similarly, if the conventional transportation of coal is replaced by its transportation in the form of a slurry through a pipeline, the consumption coefficient of a subcritical power plant increases by 0.52 L/kW h.
机译:本文旨在为煤炭发电整个生命周期中的用水量和取水量制定基准系数。这项研究不仅考虑了整个发电生命周期中涉及的所有单元操作,而且还比较了不同的煤基发电技术。总体而言,这项研究为36种不同的煤基发电途径开发了生命周期水足迹。涉及集成气化联合循环(IGCC)新技术或超常规技术与常规方法一起运煤并使用干式冷却系统的发电路径,其生命周期的水需求系数最低,约为1 L / kW h。进行敏感性分析以研究电厂性能和煤炭运输对需水系数的影响。当用煤测井管道代替传统的煤炭运输方式时,超超临界或IGCC电厂整个生命周期的能耗系数要高出0.12 L / kW h。类似地,如果用煤以浆状形式通过管道运输来代替传统的煤炭运输,那么亚临界发电厂的能耗系数将增加0.52 L / kW h。

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