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Test operation of a 100 kW pilot plant for solar hydrogen production from water on a solar tower

Roeb, Martin and Säck, Jan-Peter and Rietbrock, Peter and Prahl, Christoph and Schreiber, Heike and Neises, Martina and de Oliveira, Lamark and Ebert, Miriam and Reinalter, Wolfgang and Meyer-Grünefeld, Mirko and Sattler, Christian and Lopez, Antonio and Vidal, Alfonso and Elsberg, Anders and Stobbe, Per and Jones, D. and Steele, Andrew and Lorentzou, A. and Pagkoura, C. and Zygogianni, A. and Agrafiotis, Christos and Konstandopoulos, Athanasios G. (2011) Test operation of a 100 kW pilot plant for solar hydrogen production from water on a solar tower. Solar Energy, 85, pp. 634-644. Elsevier. DOI: 10.1016/j.solener.2010.04.014.

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Abstract

The present work describes the realisation and successful test operation of a 100 kW pilot plant for two-step solar thermo-chemical water splitting on a solar tower at the Plataforma Solar de Almerı´a, which aims at the demonstration of the feasibility of the process on a solar tower platform under real conditions. The process applies multi-valent iron based mixed metal oxides as reactive species which are coated on honeycomb absorbers inside a receiver–reactor. By the introduction of a two-chamber reactor it is possible to run both process concepts in parallel and thus, the hydrogen production process in a quasi-continuous mode. In summer 2008 an exhaustive thermal qualification of the pilot plant took place, using uncoated ceramic honeycombs as absorbers. Some main aspects of these tests were the development and validation of operational and measurement strategy, the gaining of knowledge on the dynamics of the system, in particular during thermal cycling, the determination of the controllability of the whole system, and the validation of practicability of the control concept. The thermal tests enabled to improve, to refine and finally to prove the process strategy and showed the feasibility of the control concept implemented. It could be shown that rapid changeover between the modules is a central benefit for the performance of the process. In November of 2008 the absorber was replaced and honeycombs coated with redox material were inserted. This allowed carrying out tests of hydrogen production by water splitting. Several hydrogen production cycles and metal oxide reduction cycles could be run without problems. Significant concentrations of hydrogen were produced with a conversion of steam of up to 30%.

Document Type:Article
Title:Test operation of a 100 kW pilot plant for solar hydrogen production from water on a solar tower
Authors:
AuthorsInstitution or Email of Authors
Roeb, Martinmartin.roeb@dlr.de
Säck, Jan-PeterUNSPECIFIED
Rietbrock, PeterUNSPECIFIED
Prahl, ChristophUNSPECIFIED
Schreiber, HeikeUNSPECIFIED
Neises, MartinaUNSPECIFIED
de Oliveira, LamarkUNSPECIFIED
Ebert, MiriamUNSPECIFIED
Reinalter, WolfgangUNSPECIFIED
Meyer-Grünefeld, MirkoUNSPECIFIED
Sattler, ChristianUNSPECIFIED
Lopez, AntonioUNSPECIFIED
Vidal, AlfonsoUNSPECIFIED
Elsberg, AndersUNSPECIFIED
Stobbe, PerUNSPECIFIED
Jones, D.UNSPECIFIED
Steele, AndrewUNSPECIFIED
Lorentzou, A.UNSPECIFIED
Pagkoura, C.UNSPECIFIED
Zygogianni, A.UNSPECIFIED
Agrafiotis, ChristosUNSPECIFIED
Konstandopoulos, Athanasios G.UNSPECIFIED
Date:March 2011
Journal or Publication Title:Solar Energy
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:85
DOI:10.1016/j.solener.2010.04.014
Page Range:pp. 634-644
Publisher:Elsevier
Status:Published
Keywords:Thermochemical cycle; Hydrogen; Ferrites; Receiver–reactor; Solar tower
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Stoffumwandlung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research
Deposited By: Dr.rer.nat. Christian Sattler
Deposited On:12 Dec 2011 13:50
Last Modified:12 Dec 2013 21:15

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