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Analysis and improvement of a high-efficiency solar cavity reactor design for a two-step thermochemical cycle for solar hydrogen production from water

Houaijia, Anis and Sattler, Christian and Roeb, Martin and Lange, Matthias and Breuer, Stefan and Säck, Jan-Peter (2013) Analysis and improvement of a high-efficiency solar cavity reactor design for a two-step thermochemical cycle for solar hydrogen production from water. Solar Energy, 97, pp. 26-38. Elsevier. DOI: 10.1016/j.solener.2013.07.032 ISSN 0038-092X

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Official URL: http://www.sciencedirect.com/science/article/pii/S0038092X13003071#

Abstract

The present study is related to the European research project HYDROSOL 3D dealing with a two-step thermochemical cycle for water splitting based on the use of redox materials. The overall process of a plant with a power input of 1 MWth will be developed and analyzed. This includes the definition of core components, e.g. solar reactors, heat exchangers, compressors, hydrogen separation unit and the elaboration of the flow sheet of the process. By process simulation components exergy efficiencies and thus main sources for exergy losses are determined. The results were used to identify and suggest possible improvements. Since the solar receiver-reactor was identified as the pre-dominant source of exergy losses a new design for such reactor was developed as described in the second part of the study based on the experimental experiences with a reactor developed and tested in previous projects. The main objective of the improvement of the design was to increase the efficiency by minimizing the re-radiation losses. With the support of a raytracing tool a combination of a cavity design, a hemispherical absorber shape and a secondary concentrator was derived as the most suitable reactor design exhibiting at least 25 percentage points less thermal losses than the previous version which was realized and tested as part of a pilot plant.

Item URL in elib:https://elib.dlr.de/84123/
Document Type:Article
Title:Analysis and improvement of a high-efficiency solar cavity reactor design for a two-step thermochemical cycle for solar hydrogen production from water
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Houaijia, Anisanis.houaijia (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Lange, Matthiasmatthias.lange (at) dlr.deUNSPECIFIED
Breuer, Stefanstefan.breuer (at) dlr.deUNSPECIFIED
Säck, Jan-Peterjan-peter.saeck (at) dlr.deUNSPECIFIED
Date:1 September 2013
Journal or Publication Title:Solar Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:97
DOI :10.1016/j.solener.2013.07.032
Page Range:pp. 26-38
Publisher:Elsevier
ISSN:0038-092X
Status:Published
Keywords:Solar; Hydrogen; Thermochemical; Two-step cycle; Process simulation; Exergy analysis
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:18 Sep 2013 15:29
Last Modified:12 Dec 2013 22:11

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