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Development of a Concentrator with a Rectangular Flat Focus Used for Hydrogen Production via Photocatalytic Water Splitting Employing Solar Radiation

Wullenkord, Michael and Jung, Christian and Sattler, Christian (2012) Development of a Concentrator with a Rectangular Flat Focus Used for Hydrogen Production via Photocatalytic Water Splitting Employing Solar Radiation. In: Proceedings of the ASME 2012 6th International Conference on Energy Sustainability & 10th Fuel Cell Science, Engineering and Technology Conference (ESFuelCell2012). ASME 2012 6th International Conference on Energy Sustainability & 10th Fuel Cell Science, Engineering and Technology Conference (ESFuelCell2012), 23.-26. Jul. 2012, San Diego, USA.

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Abstract

Hydrogen is a promising energy carrier. A carbon-free option to produce hydrogen is the photocatalytic splitting of water, when solar radiation provides the photons needed for the reaction. The DLR develops a test bed to assess the activity of potential catalysts either in suspensions or in fixed-bed electrochemical cells under practical sun-light conditions, concentrated by a factor up to 20. A rectangular flat focus is required in order to guarantee a homogeneous distribution of concentrated radiation on the planar receiver plate, where the light enters the receiver. A low deviation of irradiation on the receiver plate promotes a reliable evaluation of the catalysts’ efficiency and quantum yields. This paper is focused on the development of a suitable concentrator concept. A concentrator/receiver-concept featuring a homogeneous distribution of radiation on the reactor surface was chosen after analyzing different options by means of a ray tracing tool. The favorite concept employs a 2-axis modified linear Fresnel collector. The overall dimensions were determined taking the optical properties of the irradiated surface of the reactor into account. A limitation of the angle of incidence ensures that only a marginal fraction of the radiation is lost due to reflection on the irradiated surface of the reactor.

Item URL in elib:https://elib.dlr.de/80526/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Development of a Concentrator with a Rectangular Flat Focus Used for Hydrogen Production via Photocatalytic Water Splitting Employing Solar Radiation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wullenkord, Michaelmichael.wullenkord (at) dlr.deUNSPECIFIED
Jung, Christianchristian.jung (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:23 July 2012
Journal or Publication Title:Proceedings of the ASME 2012 6th International Conference on Energy Sustainability & 10th Fuel Cell Science, Engineering and Technology Conference (ESFuelCell2012)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:solar, concentrator, reactor, photochemistry, hydrogen, ray tracing
Event Title:ASME 2012 6th International Conference on Energy Sustainability & 10th Fuel Cell Science, Engineering and Technology Conference (ESFuelCell2012)
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:23.-26. Jul. 2012
Organizer:American Society of Mechanical Engineering
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:11 Jan 2013 13:49
Last Modified:12 Dec 2013 21:57

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