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Hydrogen production by coupling pressurized high temperature electrolyser with solar Tower technology

Monnerie, Nathalie and von Storch, Henrik and Houaijia, Anis and Roeb, Martin and Sattler, Christian (2017) Hydrogen production by coupling pressurized high temperature electrolyser with solar Tower technology. International Journal of Hydrogen Energy, 42, pp. 13498-13509. Elsevier. doi: 10.1016/j.ijhydene.2016.11.034. ISSN 0360-3199.

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Solar hydrogen production by coupling of pressurized high temperature electrolyser with concentrated solar tower technology is studied. As the high temperature electrolyser requires constant temperature conditions, the focus is made on a molten salt solar tower due to its high storage capacity. A flowsheet was developed and simulations were carried out with Aspen Plus 8.4 software for MW-scale hydrogen production plants. The solar part was laid out with HFLCAL software. Two different scenarios were considered: the first concerns the production of 400 kg/d hydrogen corresponding to mobility use (fuel station). The second scenario deals with the production of 4000 kg/d hydrogen for industrial use. The process was analyzed from a thermodynamic point of view by calculating the overall process efficiency and determining the annual production. It was assumed that a fixed hydrogen demand exists in the two cases and it was assessed to which extent this can be supplied by the solar high temperature electrolysis process including thermal storage as well as hydrogen storage. For time periods with a potential over supply of hydrogen, it was considered that the excess energy is sold as electricity to the grid. For time periods where the hydrogen demand cannot be fully supplied, electricity consumption from the grid was considered. It was assessed which solar multiple is appropriate to achieve low consumption of grid electricity and low excess energy. It is shown that the consumption of grid electricity is reduced for increasing solar multiple but the efficiency is also reduced. At a solar multiple of 3.0 an annual solar-to-H2 efficiency greater than 14% is achieved at grid electricity production below 5% for the industrial case (4000 kg/d). In a sensitivity study the paramount importance of electrolyser performance, i.e. efficiency and conversion, is shown.

Item URL in elib:https://elib.dlr.de/112570/
Document Type:Article
Title:Hydrogen production by coupling pressurized high temperature electrolyser with solar Tower technology
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Monnerie, NathalieNathalie.Monnerie (at) dlr.deUNSPECIFIED
von Storch, HenrikHenrik.vonStorch (at) dlr.deUNSPECIFIED
Houaijia, AnisAnis.Houaijia (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:1 June 2017
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ijhydene.2016.11.034
Page Range:pp. 13498-13509
Keywords:High temperature electrolysis Hydrogen Solar energy CSP
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: Jülich , Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:09 Aug 2017 09:58
Last Modified:09 Aug 2017 09:58

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