Efficiency analysis of 50 kWe SOFC systems fueled with biogas from waste water

Hendrik Langnickel, Markus Rautanen (Corresponding Author), Marta Gandiglio, Massimo Santarelli, Tuomas Hakala, Marco Acri, Jari Kiviaho

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)
    101 Downloads (Pure)

    Abstract

    Solid oxide fuel cell systems (SOFCs) are able to convert biogas from e.g. waste water plants highly efficiently into electricity and heat. An efficiency study of industrial sized solid oxide fuel cell systems installed at a waste water treatment plant is presented. The site consist of a biogas cleaning unit, two Convion C50 SOFC systems and a heat recovery section. The electric and total efficiencies of the systems are analyzed as a function of the electric net power output. The two systems achieved consistently high electric (50–55%) and total (80–90%) efficiencies in an electric net power output range between 25 kW and 55 kW. The study also shows that the high system efficiencies are independent of the CH4 content in the biogas. The results indicate that fuel cell systems are able to perform power modulation according to the power demand, while achieving constant high efficiencies. This is a clear benefit in comparison to micro turbines and combustion engines which are normally used for converting biogas into electricity and heat.
    Original languageEnglish
    Article number100009
    JournalJournal of Power Sources Advances
    Volume2
    DOIs
    Publication statusPublished - 1 Apr 2020
    MoE publication typeA1 Journal article-refereed

    Funding

    This project has received funding from the Fuel Cells and Hydrogen 2 Joint Undertaking under grant agreement No 671470. This Joint Undertaking receives support from the European Union's Horizon 2020 research and innovation programme, Hydrogen Europe and Hydrogen Europe research.

    Keywords

    • Solid oxide fuel cells
    • Biogas
    • Combined heat and power
    • efficiency
    • Waste water treatment
    • Circular economy

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