Enhancement of energy generation efficiency in industrial facilities by SOFC – SOEC systems with additional hydrogen production

工艺工程 化石燃料 高效能源利用 制氢 能源消耗 能量载体 环境科学 发电 一次能源 工作(物理) 计算机科学 废物管理 化学 工程类 机械工程 电气工程 功率(物理) 热力学 有机化学 物理
作者
Giulio Vialetto,Marco Noro,Paolo Colbertaldo,Masoud Rokni
出处
期刊:International Journal of Hydrogen Energy [Elsevier BV]
卷期号:44 (19): 9608-9620 被引量:44
标识
DOI:10.1016/j.ijhydene.2018.08.145
摘要

Industry is one of the highest energy consumption sector: some facilities like steelworks, foundries, or paper mills are highly energy-intensive activities. Many countries have already implemented subsidies on energy efficiency in generation and utilisation, with the aim of decreasing overall consumption and energy intensity of gross domestic product. Meanwhile, researchers have increased interest into alternative energy systems to decrease pollution and use of fossil fuels. Hydrogen, in particular, is proposed as a clean alternative energy vector, as it can be used as energy storage mean or to replace fossil fuels, e.g. for transport. This work analyses the re-vamping of the energy generation system of a paper mill by means of reversible solid oxide cells (RSOCs). The aim is not only to increase efficiency on energy generation, but also to create a polygeneration system where hydrogen is produced. Application on a real industrial facility, based in Italy with a production capacity of 60000 t/y of paper, is analysed. First, the current energy system is studied. Then, a novel system based on RSOC is proposed. Each component of the systems (both existing and novel) is defined using operational data, technical datasheet, or models defined with thermodynamic tools. Then, the interaction between them is studied. Primary energy analysis on the novel system is performed, and saving with respect to the current configuration is evaluated. Even if the complexity of the system increases, results show that saving occurs between 2 and 6%. Hydrogen generation is assessed, comparing the RSOC integrated system with proton exchange membrane (PEM) electrolysis, in terms of both primary energy and economics. Results exhibit significant primary energy and good economic performance on hydrogen production with the novel system proposed (hydrogen cost decreases from 10 €/kg to at least 8 €/kg).
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