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Solar hydrogen by high-temperature electrolysis: Flowsheeting and experimental analysis of a tube-type receiver concept for superheated steam production

Houaijia, Anis and Breuer, Stefan and Thomey, Dennis and Brosig, Christian and Säck, Jan-Peter and Roeb, Martin and Sattler, Christian (2014) Solar hydrogen by high-temperature electrolysis: Flowsheeting and experimental analysis of a tube-type receiver concept for superheated steam production. Energy Procedia, 49, pp. 1960-1969. Elsevier. DOI: 10.1016/j.egypro.2014.03.208. ISSN 1876-6102.

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Abstract

High-temperature electrolysis (HTE) offers the potential of considerably higher efficiency than conventional alkaline electrolysis when producing hydrogen from water by solar energy. The production rate of the alkaline electrolyzer process is limited since the whole energy demand is covered by electricity. By contrast, in HTE part of the energy can be introduced as high temperature heat from concentrated solar power (CSP) leading to a significantly higher process efficiency. In the internal project SoHTEk a solar tube-type receiver to superheat steam to 700 °C for HTE was developed. The receiver was operated in DLR’s solar Simulator with up to 5 kg/h of steam reaching an outlet temperature of about 700 °C at a thermal efficiency of 40 % and a solar power of about 4 kW. In addition, a flowsheeting analysis was carried out of a HTE process with direct steam generation on a solar tower. Simulation of the process at steady-state yielded a thermal-to-hydrogen efficiency of 26 %. A subsequent sensitivity Analysis indicated the potential to reach efficiencies of 38 % and more.

Document Type:Article
Title:Solar hydrogen by high-temperature electrolysis: Flowsheeting and experimental analysis of a tube-type receiver concept for superheated steam production
Authors:
AuthorsInstitution or Email of Authors
Houaijia, Anisanis.houaijia@dlr.de
Breuer, Stefanstefan.breuer@dlr.de
Thomey, Dennisdennis.thomey@dlr.de
Brosig, ChristianSF-SOL
Säck, Jan-Peterjan-peter.saeck@dlr.de
Roeb, MartinMartin.roeb@dlr.de
Sattler, Christianchristian.sattler@dlr.de
Date:1 June 2014
Journal or Publication Title:Energy Procedia
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:49
DOI:10.1016/j.egypro.2014.03.208
Page Range:pp. 1960-1969
Publisher:Elsevier
ISSN:1876-6102
Status:Published
Keywords:high temperature electrolysis; solar; hydrogen
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Verfahrenstechnik (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Dr.rer.nat. Christian Sattler
Deposited On:07 Aug 2014 15:51
Last Modified:07 Aug 2014 15:51

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