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Holistic energy flow analysis of a solar driven thermo-chemical reactor set-up for sustainable hydrogen production

Menz, Steffen and Lampe, Jörg and Krause, Johann and Seeger, Thomas and Fend, Thomas (2022) Holistic energy flow analysis of a solar driven thermo-chemical reactor set-up for sustainable hydrogen production. Renewable Energy. Elsevier. doi: 10.1016/j.renene.2022.03.033. ISSN 0960-1481.

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In this contribution, a holistic energy flow analysis of a solar driven pilot plant for green hydrogen production using two-step thermochemical cerium-based redox cycles is carried out. The plant consists of a heliostat field, a large-scale inert gas reactor, an efficient fluid heat recovery system and an electrical vaporizer for steam generation. The system behaviour is physically described, and energy flows are quantified using a complex simulation model considering material and geometric properties of the complete system design. The system energy flow and corresponding impact on plant efficiency is thoroughly analysed with emphasis on plant design, operational strategy, and influence of the crucial control parameters. Influences of a heat recovery system and the size of various types of heat losses are investigated, potential efficiency improvements are revealed and useful possibilities for plant design and material modifications are discussed. The transient system behaviour is investigated by varying temperatures and mass flow rates in a broad practicable range to gain more insight in efficient reactor design and plant control. Two temperature swing strategies are investigated in more detail, which are by far more efficient than any near-isothermal or isothermal strategy for this application.

Item URL in elib:https://elib.dlr.de/190389/
Document Type:Article
Title:Holistic energy flow analysis of a solar driven thermo-chemical reactor set-up for sustainable hydrogen production
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Lampe, JörgUNSPECIFIEDhttps://orcid.org/0000-0002-0789-0371UNSPECIFIED
Seeger, ThomasInstitute of Engineering Thermodynamics, University of Siegen, GermanyUNSPECIFIEDUNSPECIFIED
Fend, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-3556-9083UNSPECIFIED
Date:10 March 2022
Journal or Publication Title:Renewable Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:Solar fuels, Concentrated solar power, Hydrogen, Redox cycling, Physical modelling
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Chemical Energy Carriers
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Future Fuels
Deposited By: Fend, Dr.-Ing. Thomas
Deposited On:02 Dec 2022 09:41
Last Modified:20 Oct 2023 07:26

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