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Moving Brick Receiver-Reactor: A Solar Thermochemical Reactor and Process Design With a Solid-Solid Heat Exchanger and On-Demand Production of Hydrogen and/or Carbon Monoxide

Siegrist, Silvan and von Storch, Henrik and Roeb, Martin and Sattler, Christian (2018) Moving Brick Receiver-Reactor: A Solar Thermochemical Reactor and Process Design With a Solid-Solid Heat Exchanger and On-Demand Production of Hydrogen and/or Carbon Monoxide. Journal of Solar Energy Engineering. American Society of Mechanical Engineers (ASME). DOI: 10.1115/1.4042069 ISSN 0199-6231

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Abstract

Three crucial aspects still to be overcome to achieve commercial competitiveness of the solar thermochemical production of hydrogen and carbon monoxide are recuperating the heat from the solid phase, achieving continuous or on-demand production beyond the hours of sunshine, and scaling to commercial plant sizes. To tackle all three aspects we propose a Moving Brick Receiver-Reactor (MBR2) design with a solid-solid heat exchanger. The MBR2 consists of porous bricks that are reversibly mounted on a high temperature transport mechanism, a receiver-reactor where the bricks are reduced by passing through the concentrated solar radiation, a solid-solid heat exchanger under partial vacuum in which the reduced bricks transfer heat to the oxidized bricks, a first storage for the reduced bricks, an oxidation reactor, and a second storage for the oxidized bricks. The bricks may be made of any nonvolatile redox material suitable for a thermochemical two-step water or carbon dioxide splitting cycle. A first thermodynamic analysis shows that the MBR2 may be able to achieve solar-to-chemical conversion efficiencies of approximately 0.25. Additionally, we identify the desired operating conditions and show that the heat exchanger efficiency has to be higher than the fraction of recombination in order to increase the conversion efficiency.

Item URL in elib:https://elib.dlr.de/124227/
Document Type:Article
Title:Moving Brick Receiver-Reactor: A Solar Thermochemical Reactor and Process Design With a Solid-Solid Heat Exchanger and On-Demand Production of Hydrogen and/or Carbon Monoxide
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Siegrist, SilvanSilvan.Siegrist (at) dlr.dehttps://orcid.org/0000-0001-9069-2220
von Storch, HenrikHenrik.vonStorch (at) dlr.dehttps://orcid.org/0000-0002-7067-5957
Roeb, MartinMartin.roeb (at) dlr.dehttps://orcid.org/0000-0002-9813-5135
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:2018
Journal or Publication Title:Journal of Solar Energy Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1115/1.4042069
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0199-6231
Status:Published
Keywords:Bricks , Carbon , Heat exchangers , Solar energy , Process design , Hydrogen , Storage , Heat , Solar radiation , Vacuum
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Jülich
Institutes and Institutions:Institute of Solar Research > Solartowersystems
Institute of Solar Research > Solar Chemical Engineering
Deposited By: Siegrist, Silvan
Deposited On:21 Dec 2018 10:08
Last Modified:21 Dec 2018 10:08

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