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/ | ||||||||||||
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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: |
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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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