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Solar power tower as heat and electricity source for a solid oxide electrolyzer: a case study

Houaijia, Anis and Roeb, Martin and Monnerie, Nathalie and Sattler, Christian (2015) Solar power tower as heat and electricity source for a solid oxide electrolyzer: a case study. International Journal of Energy Research, 39 (8), pp. 1120-1130. Wiley. DOI: 10.1002/er.3316 ISSN 0363-907X

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/er.3316/abstract

Abstract

High-temperature steam electrolysis (HTSE) consists of the splitting of steam into hydrogen and oxygen at high temperature in solid oxide electrolyzers. Performing the electrolysis process at high temperatures offers the advantage of achieving higher efficiencies as compared to the conventional water electrolysis. Furthermore, this allows the direct use of process heat to generate steam. This paper is related to the FCH JU (Fuel Cells and Hydrogen Joint Undertaking) project ADEL (ADvanced ELectrolyser For hydrogen Production with Renewable Energy Sources), which investigates different carbon-free energy sources to be coupled to the HTSE process. Renewable energy sources are able to provide the high-temperature steam electrolysis (HTSE) process with heat and power. This paper investigates the capability of Concentrating Solar Power (CSP) technologies to provide the HTSE process with the necessary energy demand. The layout of the plant is shown in the following figure. The design of commercial-scale high-temperature steam electrolysis has been carried out. The HTSE plant is coupled to an air cooled solar tower. The configuration and the operating parameters of the solar tower are based on those of the solar tower of Jülich (Germany), which is operated by DLR. This paper presents the results of process analysis performed to evaluate the hydrogen production from a HTSE plant coupled to an 80MWth air solar tower. Additionally, the dynamic behavior of the system during energy fluctuations has been analyzed. The receiver-to-hydrogen efficiency (based on the Higher Heating Value of hydrogen) is 26% at a hydrogen production rate of 680 kg/h in steady-state operation. The overall solar-to-hydrogen efficiency is calculated to be at 18%. Moreover, the analysis under transient conditions shows that a steady-state operation of the plant is only possible for 8 h.

Item URL in elib:https://elib.dlr.de/97849/
Document Type:Article
Title:Solar power tower as heat and electricity source for a solid oxide electrolyzer: a case study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Houaijia, Anisanis.houaijia (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Monnerie, Nathalienathalie.monnerie (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:5 March 2015
Journal or Publication Title:International Journal of Energy Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:39
DOI :10.1002/er.3316
Page Range:pp. 1120-1130
Publisher:Wiley
ISSN:0363-907X
Status:Published
Keywords:hydrogen; high temperature steam electrolysis; solar energy; electrolyzer; simulation
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 - Solar Process Technology (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:17 Aug 2015 13:23
Last Modified:08 Mar 2018 18:38

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