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Development of a window cooling for high temperature solar receivers

Uhlig, Ralf and Röger, Marc (2004) Development of a window cooling for high temperature solar receivers. 22nd CADFEM Users’ Meeting 2004 - International Congress on FEM-Technology and the ANSYS CFX & ICEM CFD Conference, 2004-11-10 - 2004-11-12, Dresden (Germany).

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Abstract

ANSYS/FLOTRAN had been used to calcualte the air flow in a gap between two quartz glass windows. This was done to design a cooling system for high temperature solar receivers, which are used to convert concentrated sunlight into high temperature heat. The most important thermal influences as radiation exchange between the windows and the absorber as well as the radiation to space of the pressure window had been considered. With a 2D axially symmetric parametric modell the CPU time was small enough to calculate severall varitations. The aim was to find out the best geometry for the cooling window for reaching the lowest possible glass temperatures by an minimum cooling mass flow and by adherence the possible pressure drop of the cooling system. The calculations showed that the best result could be reached by giving a swirl (around the middle axis) to the cooling flow. Therefore a special flange was designed for an uniform distribution and to give the swirl to the cooling flow. After manufactoring of the cooling window, the window was measured on a 3D measurement machine and the geometrie in the CFD modell was aligned to the real geometrie. Further calculations with the “real” gemetrie showed that the pressure drop will be less and the temperatures in the windows will be a little higher then in the design geometrie.The high temperature module was tested together with an gas turbine at the Plataforma Solar de Almeria (PSA) in south Spain. The first evaluation of the measurements showed that the cooling works well. The cooling flow works like CFD calculation predicted. Even the pressure drop was near the simulations.

Document Type:Conference or Workshop Item (Speech)
Additional Information:Proceedings CD-ROM
Title:Development of a window cooling for high temperature solar receivers
Authors:
AuthorsInstitution or Email of Authors
Uhlig, Ralfralf.uhlig@dlr.de
Röger, Marcmarc.roeger@dlr.de
Date:November 2004
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
UNSPECIFIEDCADFEM
Status:Published
Keywords:Solar energy, CFD, radiation exchange, quartz glass, Solarenergie, CFD, Strahlungsaustausch, Quarzglas
Event Title:22nd CADFEM Users’ Meeting 2004 - International Congress on FEM-Technology and the ANSYS CFX & ICEM CFD Conference
Event Location:Dresden (Germany)
Event Type:international Conference
Event Dates:2004-11-10 - 2004-11-12
Organizer:CAD-FEM GmbH and ANSYS Germany GmbH
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Hochtemperatursysteme (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Marc Röger
Deposited On:24 Jan 2006
Last Modified:14 Jul 2015 11:37

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