Embodied energy analysis for coal-based power generation system-highlighting the role of indirect energy cost. (15th December 2016)

• Record Type: Journal Article
• Authors: Wu, X.D.; Xia, X.H.; Chen, G.Q.; Wu, X.F.; Chen, B.
• Is Part Of: Applied energy. Volume 184(2016)
• Page Start: 936
• Page End: 950
• Publication Date: 2016-12-15
• Subjects: Coal-based power generation -- Embodied energy accounting -- Benchmark -- Indirect energy cost; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2016.03.027
• Languages: English
• ISSNs: 0306-2619

Abstract

Graphical abstract: The indirect energy cost shares around one-tenth of the total energy expenditure throughout the typical power plant's lifetime. Highlights: An embodied energy accounting for a typical coal-fired power system is undertaken. An inventory of life cycle energy inputs for the power plant is established. Full consideration is given to energy embodied in materials, equipment and services. The indirect energy cost shares around one-tenth of the total. This work could be a reference for holistic evaluation of power systems worldwide. Abstract: Coal-based power generation accounts for over two fifths of global electricity supply and is supposed to be continuing its leading role in the coming decades. However, an integrated embodied energy accounting for typical coal-fired power system seems to be in its vacancy. To help erect a benchmark for energy analysis of electricity production, this study has for the first time established a complete inventory of energy inputs in the life cycle of a typical coal-fired power plant. Distinguished from previous works, with the support of ecological input–output database, this paper gives full consideration to the energy embodied in materials, equipment and services that have been traditionally neglected. The indirect energy cost is illustrated to be a non-negligible component, sharing around one-tenth of the total. This work could be a reference example for holistic energy evaluation of power generation systems worldwide. In current context of energy conservation and emissions abatement, it is of significant importance as the retrofitting of power generation systems may initiate large amounts of indirect energy cost. Besides, by calculating the nonrenewability indicator for the typical coal-fired power system, the energy saving potentials of several renewable alternatives are enunciated in this work. It may provide essential implications for policy makers in renewable deployment.