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Simulation of a Solar Receiver-Reactor for Hydrogen Production

Neises, Martina and Göhring, Felix and Roeb, Martin and Sattler, Christian and Pitz-Paal, Robert (2009) Simulation of a Solar Receiver-Reactor for Hydrogen Production. In: ASME 2009 3rd International Conference on Energy Sustainability, Vol. 1, pp. 295-304. ASME Digital Collection. ASME 2009 3rd International Conference on Energy Sustainability, 19-23 July 2009, San Francisco. DOI: doi:10.1115/ES2009-90273 ISBN 978-0-7918-4889-0

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Official URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1647764

Abstract

The transient thermal behavior of two solar receiver-reactors for hydrogen production has been modeled using Modelica/Dymola. The simulated reactors are dedicated to carry out the same chemical reactions but represent two different development stages of the project HYDROSOL and two different orders of magnitude concerning reactor size and hydrogen production capacity. The process itself is a two step thermochemical cycle, which uses mixed iron-oxides as a redox-system. The iron-oxide is coated on a ceramic substrate, which is placed inside the receiver-reactor and serves on the one hand as an absorber for solar radiation and on the other hand as the reaction zone for the chemical reaction. The process consists of a water splitting step in which hydrogen is produced and a regeneration step during which the used redox-material is being reduced. The reactor is operated between these two reaction conditions in regular intervals with alternating temperature levels of about 800 °C for the water splitting step and 1200 °C for the regeneration step. Because of this highly dynamic process and because of fluctuating solar radiation during the day, a mathematical tool was necessary to model the transient behavior of the reactor for theoretical studies. Two models have been developed for two existing receiver-reactors. One model has been set up to simulate the behavior of a small scale test reactor, which has been built and tested at the solar furnace of DLR in Cologne. Results are very promising and show that the model is able to reflect the thermal behavior of the reactor. Another model has been developed for a 100 kWth pilot reactor which was set up at the Plataforma Solar de Almería in Spain. This model is based on the first model but special geometrical features had to be adapted. With this model temperatures and hydrogen production rates could be predicted.

Item URL in elib:https://elib.dlr.de/108379/
Document Type:Conference or Workshop Item (Speech)
Title:Simulation of a Solar Receiver-Reactor for Hydrogen Production
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neises, MartinaMartina.Neises (at) dlr.deUNSPECIFIED
Göhring, FelixFelix.Goehring (at) dlr.dehttps://orcid.org/0000-0002-8514-0453
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Pitz-Paal, RobertRobert.Pitz-Paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391
Date:2009
Journal or Publication Title:ASME 2009 3rd International Conference on Energy Sustainability, Vol. 1
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :doi:10.1115/ES2009-90273
Page Range:pp. 295-304
Publisher:ASME Digital Collection
ISBN:978-0-7918-4889-0
Status:Published
Keywords:hydrogen, thermochemical cycle, Dymola, iron oxide
Event Title:ASME 2009 3rd International Conference on Energy Sustainability
Event Location:San Francisco
Event Type:international Conference
Event Dates:19-23 July 2009
Organizer:ASME
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solar Fuels (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research
Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Roeb, Dr.rer.nat. Martin
Deposited On:01 Dec 2016 19:14
Last Modified:01 Dec 2016 19:14

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