• Login
    View Item 
    •   Home
    • Theses & Dissertations
    • 2015 - Mines Theses & Dissertations
    • View Item
    •   Home
    • Theses & Dissertations
    • 2015 - Mines Theses & Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Mines RepositoryCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    Login

    Mines Links

    Arthur Lakes LibraryColorado School of Mines

    Statistics

    Display Statistics

    Design and analysis of reversible solid oxide cell systems for electrical energy storage

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Wendel_mines_0052E_10723.pdf
    Size:
    4.095Mb
    Format:
    PDF
    Description:
    Design and analysis of reversible ...
    Download
    Author
    Wendel, Christopher H.
    Advisor
    Braun, Robert J.
    Date issued
    2015
    Keywords
    technoeconomic analysis
    system design
    solid oxide cell
    reversible fuel cell
    electrolysis
    electrical energy storage
    Energy storage
    Solid oxide fuel cells
    Electrolysis
    Thermodynamics
    System design
    
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/11124/17130
    Abstract
    Electrical energy storage is projected to be a critical component of the future world energy system, performing load-leveling operations to enable increased penetration of renewable and distributed generation. Reversible solid oxide cell (ReSOC) technology has the potential to play a major role in stationary electrical energy storage markets. ReSOCs operate in two distinct modes: fuel producing (electrolysis mode) and power producing (fuel cell mode). A stand-alone energy storage system is realized from this technology by coupling the two operating modes with intermediate storage of reactant and product species. In this dissertation, ReSOC energy storage systems are designed and analyzed with computational modeling to establish suitable system configurations and operating conditions that achieve high roundtrip efficiency. A critical feature of the ReSOC system that enables high roundtrip efficiency is that the ReSOC is operated at conditions where methane is generated in electrolysis mode to offset the typically endothermic conversion process. Methanation is promoted by low temperature and high pressure conditions, meaning that intermediate-temperature ReSOCs (<700°C) are important to achieving high system performance. Doped lanthanum gallate (LSGM)-electrolyte ReSOC characteristics are leveraged in this study. The results include thermodynamic analysis of ReSOC systems, physically-based calibrated modeling of intermediate temperature ReSOCs, steady-state system simulation at distributed (100 kW) and bulk (>10 MW) scales, and bottom-up system costing. System modeling results suggest that dc roundtrip energy storage efficiency of 65-74% are achieved for a 100 kW system. Maximum efficiency is achieved when the tanked species are maintained in the vapor phase to mitigate the energetic requirement of steam generation; although the energy density suffers within this configuration. The bulk scale system achieves 74% roundtrip efficiency at optimal stack operating conditions of 680°C, 20 bar, and 70% fuel utilization. Economic calculations estimate bulk-scale (250 MW / 500 GWh) storage cost of 1.7 ¢/kWh based on the system capital cost. This storage cost is lower than compressed air and battery technologies and comparable to pumped hydro, but improvements in cell technology and additional system simulation and hardware selection must be addressed before commercialization.
    Rights
    Copyright of the original work is retained by the author.
    Collections
    2015 - Mines Theses & Dissertations

    entitlement

     
    DSpace software (copyright © 2002 - 2023)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.