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Electrochemical Hydrogen Production Powered by PV/CSP Hybrid Power Plants: A Modelling Approach for Cost OptimalSystem Design

Rosenstiel, Andreas and Monnerie, Nathalie and Dersch, Jürgen and Roeb, Martin and Pitz-Paal, Robert and Sattler, Christian (2021) Electrochemical Hydrogen Production Powered by PV/CSP Hybrid Power Plants: A Modelling Approach for Cost OptimalSystem Design. Energies, 14 (12), p. 3437. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en14123437. ISSN 1996-1073.

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Official URL: https://www.mdpi.com/1996-1073/14/12/3437


Global trade of green hydrogen will probably become a vital factor in reaching climate neutrality. The sunbelt of the Earth has a great potential for large-scale hydrogen production. One promising pathway to solar hydrogen is to use economically priced electricity from photovoltaics (PV) for electrochemical water splitting. However, storing electricity with batteries is still expensive and without storage only a small operating capacity of electrolyser systems can be reached. Combining PV with concentrated solar power (CSP) and thermal energy storage (TES) seems a good pathway to reach more electrolyser full load hours and thereby lower levelized costs of hydrogen (LCOH). This work introduces an energy system model for finding cost-optimal designs of such PV/CSP hybrid hydrogen production plants based on a global optimization algorithm. The model includes an operational strategy which improves the interplay between PV and CSP part, allowing also to store PV surplus electricity as heat. An exemplary study for stand-alone hydrogen production with an alkaline electrolyser (AEL) system is carried out. Three different locations with different solar resources are considered, regarding the total installed costs (TIC) to obtain realistic LCOH values. The study shows that a combination of PV and CSP is an auspicious concept for large-scale solar hydrogen production, leading to lower costs than using one of the technologies on its own. For today’s PV and CSP costs, minimum levelized costs of hydrogen of 4.04 USD/kg were determined for a plant located in Ouarzazate (Morocco). Considering the foreseen decrease in PV and CSP costs until 2030, cuts the LCOH to 3.09 USD/kg while still a combination of PV and CSP is the most economic system.

Item URL in elib:https://elib.dlr.de/146061/
Document Type:Article
Title:Electrochemical Hydrogen Production Powered by PV/CSP Hybrid Power Plants: A Modelling Approach for Cost OptimalSystem Design
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dersch, JürgenUNSPECIFIEDhttps://orcid.org/0000-0003-0346-1235UNSPECIFIED
Pitz-Paal, RobertUNSPECIFIEDhttps://orcid.org/0000-0002-3542-3391UNSPECIFIED
Sattler, ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-4314-1124UNSPECIFIED
Date:10 June 2021
Journal or Publication Title:Energies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 3437
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:solar hydrogen; levelized cost of hydrogen; alkaline electrolysis; concentrated solarpower; photovoltaics
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Chemical Energy Carriers
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Future Fuels
Institute of Future Fuels > Solar-Chemical Process Development
Deposited By: Bülow, Mark
Deposited On:07 Jan 2022 11:51
Last Modified:07 Jan 2022 11:51

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