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Thermochemical Storage for CSP via Redox Structured Reactors/Heat Exchangers: the RESTRUCTURE Project

Karagiannakis, George and Pagkoura, Chrysoula and Konstandopoulos, Athanasios G. and Tescari, Stefania and Singh, Abhishek Kumar and Roeb, Martin and Lange, Matthias and Marcher, J. and Jové, Aleix and Prieto, Cristina and Rattenbury, Michael and Chasiotis, Andreas (2017) Thermochemical Storage for CSP via Redox Structured Reactors/Heat Exchangers: the RESTRUCTURE Project. In: AIP Conference Proceedings, 1850, 090004-1. AIP. SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems, 11.-14. Okt. 2016, Abu Dhabi, UAE. doi: 10.1063/1.4984453.

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The present work provides an overview of activities performed in the framework of the EU-funded collaborative project RESTRUCTURE, the main goal of which was to develop and validate a compact structured reactor/heat exchanger for thermochemical storage driven by 2-step high temperature redox metal oxide cycles. The starting point of development path included redox materials qualification via both theoretical and lab-scale experimental studies. Most favorable compositions were cobalt oxide/alumina composites. Preparation of small-scale structured bodies included various approaches, ranging from perforated pellets to more sophisticated honeycomb geometries, fabricated by extrusion and coating. Proof-of-concept of the proposed novel reactor/heat exchanger was successfully validated in small-scale structures and the next step included scaling up of redox honeycombs production. Significant challenges were identified for the case of extruded full-size bodies and the final qualified approach related to preparation of cordierite substrates coated with cobalt oxide. The successful experimental evaluation of the pilot reactor/heat exchanger system constructed motivated the preliminary techno-economic evaluation of the proposed novel thermochemical energy storage concept. Taking into account experimental results, available technologies and standard design aspects a model for a 70.5 MWe CSP plant was defined. Estimated LCOE costs were calculated to be in the range of reference values for Combined Cycle Power Plants operated by natural gas. One of main cost contributors was the storage system itself, partially due to relatively high cost of cobalt oxide. This highlighted the need to identify less costly and equally efficient to cobalt oxide redox materials.

Item URL in elib:https://elib.dlr.de/113001/
Document Type:Conference or Workshop Item (Speech)
Title:Thermochemical Storage for CSP via Redox Structured Reactors/Heat Exchangers: the RESTRUCTURE Project
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Karagiannakis, Georgegkarag (at) cperi.certh.grUNSPECIFIED
Pagkoura, Chrysoulaaptl, certh-cperiUNSPECIFIED
Konstandopoulos, Athanasios G.certh/cperi aptlUNSPECIFIED
Tescari, StefaniaStefania.Tescari (at) dlr.deUNSPECIFIED
Singh, Abhishek KumarAbhishek.Singh (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.Roeb (at) dlr.deUNSPECIFIED
Lange, MatthiasMatthias.Lange (at) dlr.dehttps://orcid.org/0000-0003-4747-0010
Marcher, J.LiqTech International A/SUNSPECIFIED
Jové, AleixAbengoa ResearchUNSPECIFIED
Prieto, CristinaAbengoa ResearchUNSPECIFIED
Rattenbury, MichaelMolycorp Chemicals & Oxides (Europe) LtdUNSPECIFIED
Chasiotis, AndreasAeiforos Metal Processing S.A.UNSPECIFIED
Date:September 2017
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1063/1.4984453
Page Range:090004-1
Series Name:Conference Proceeding
Keywords:heat storage, thermochemical cycles, CSP, solar, thermochemical, metal oxide
Event Title:SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems
Event Location:Abu Dhabi, UAE
Event Type:international Conference
Event Dates:11.-14. Okt. 2016
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
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:18 Dec 2017 11:12
Last Modified:18 Dec 2017 11:12

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