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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 (2013) Solar hydrogen by high-temperature electrolysis: Flowsheeting and experimental analysis of a tube-type receiver concept for superheated steam production. SolarPACES Conference 2013, 17.-20. Sept. 2013, Las Vegas, USA.

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Official URL: http://cms.solarpaces2013.solarpaces.org/proceedings

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.

Item URL in elib:https://elib.dlr.de/85144/
Document Type:Conference or Workshop Item (Speech)
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 AuthorsAuthors ORCID iD
Houaijia, Anisanis.houaijia (at) dlr.deUNSPECIFIED
Breuer, Stefanstefan.breuer (at) dlr.deUNSPECIFIED
Thomey, Dennisdennis.thomey (at) dlr.deUNSPECIFIED
Brosig, ChristianSF-SOLUNSPECIFIED
Säck, Jan-Peterjan-peter.saeck (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:18 September 2013
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:solar; hydrogen; high-temperature electrolysis
Event Title:SolarPACES Conference 2013
Event Location:Las Vegas, USA
Event Type:international Conference
Event Dates:17.-20. Sept. 2013
Organizer:SolarPACES
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
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: Sattler, Prof. Dr. Christian
Deposited On:15 Nov 2013 16:06
Last Modified:08 May 2014 23:29

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