考虑生命周期的中国煤电水足迹评估

Water Footprint Assessment of Coal-fired Power Generation in China Based on Life Cycle Theory

由于部分煤电水足迹评估局限于煤电生产的某一阶段,且煤电水足迹评估具有一定的时效性。因此,为更合理评估中国最新的煤电水足迹,本研究基于生命周期理论建立了涵盖煤炭生产和燃煤发电过程的煤电水足迹评估模型,在量化我国"十三五"期间煤电水足迹的基础上,讨论了不同情景假设下的煤电水足迹,最后结合水足迹占比分析了煤电水足迹对水资源的影响。结果表明,我国煤电生产的蓝色水足迹和灰色水足迹还存在较大改善空间,其中空气冷却技术的推广和燃煤发电废水零排放的实现是关键所在。

As part of the water footprint assessment of coal power is limited to a certain stage of coal power production,and the water footprint assessment of coal power has a certain timeliness.Therefore,in order to more reasonably assess the water footprint of China’s latest coal power,a water footprint assessment model covering coal production and coal-fired power generation processes was established based on life cycle theory.Based on quantifying the water footprint of coal power in China during the"Thirteenth FiveYear Plan"period,the water footprint of coal power under different scenarios is discussed.Finally,the impact of coal water footprint is analyzed in combination with the proportion of water footprint.The results show that there is still much room for improvement in the blue water footprint and gray water footprint of coal power production in China,in which the promotion of air cooling technology and the realization of zero discharge of coal-fired power generation wastewater are essential.