1 / 16

Stefan Breuer , Dennis Thomey DLR Institute for Solar research

Development of a solar driven tube receiver to superheat steam for the high temperature electrolysis. Stefan Breuer , Dennis Thomey DLR Institute for Solar research. Content. Overview Designstudy Thermal balancing Constructing and assembling the receiver Outlook .

dinh
Download Presentation

Stefan Breuer , Dennis Thomey DLR Institute for Solar research

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. > IRES 2012> Breuer > 14.11.2012 Development of a solar driventubereceivertosuperheatsteamforthe high temperatureelectrolysis Stefan Breuer, Dennis Thomey DLR Institute for Solar research

  2. > IRES 2012> Breuer > 14.11.2012 Content • Overview • Designstudy • Thermal balancing • Constructingandassemblingthereceiver • Outlook

  3. > IRES 2012> Breuer > 14.11.2012 OverviewOverall Process Development and experimental analysisof a solar receiver in the DLR high flux solar simulator 2011-14 2012-14 Techno-economicanalysis:Flowsheetingandsimulationof a MW-scalefacility.

  4. > IRES 2012> Breuer > 14.11.2012 OverviewMotivation (HTE) • Electricalenergydemanddrops • Heatdemandrises • Total demandrisesveryfew • Overall efficiencyimprovesat highertemperature

  5. > IRES 2012> Breuer > 14.11.2012 OverviewSolarsimulator • Solar Simulator in Cologne • 10 Xenon Lamps • Max. peak power outputat 36 kW • 90% radiationhitstargetof 9 cm • Max solar fluxdensity ~5 MW/m² • Implementing a shuttersystemforfluxcontrol

  6. > IRES 2012> Breuer > 14.11.2012 Designstudyvolumetricandtubulardifferences Open system: windowneeded Closedsystem: nowindowneeded Sealingproblemswithwindow Lots oftubeconnectors Useofstandardparts (tubes) Extrusion ofmonolithstructure SiSiC Structure High temperaturesteel/alloy

  7. > IRES 2012> Breuer > 14.11.2012 Thermal balancinggeometricallayout - integral calculation • Calculation of an integral system • Front (1) isopen • Assumptionof wall temperature • Calculatetheradiationofside (2) and back (3) tothe front • Viewfactorcalculationby VDI-Heatatlas • Calculationofneeded power forbackradiationand fluid heating • Cylinderhasgoodradiationandconstructingproperties 2 1 3

  8. > IRES 2012> Breuer > 14.11.2012 Thermal balancingthermal layout - differential calculation 2 • Segmentation into 10 ringelements • View factorscalculatedby MATLAB® • Wall temperaturecalculation via raytracing (OptiCAD ®) • Convectionalheattransferonto fluid per ringelement • Radiation heatexchangecalculation • Implementing a flux-densitycontroller (shutter-system) 2.1 2.2 2.3 2.4 2.n 1 3

  9. > IRES 2012> Breuer > 14.11.2012 Thermal balancingcalculationmethods - raytracing • Raytracingexecutedby OptiCAD • Implemented solar simulatordata • Division of wall into 10 ringelementswitheach 40 segments • Summation ofincoming power per ringelement • Focus distancevariationforoptimizedusageofincomingradiation

  10. > IRES 2012> Breuer > 14.11.2012 Thermal balancing Thermal balancing - focusvariationforincoming power

  11. > IRES 2012> Breuer > 14.11.2012 Thermal balancingcalculationmethods - heattransfer • Convectional heattransfercalculationby Nusselt-correlation VDI-HA • Logarithmicaveragetemperaturedepends on walltemperature • Wall temperaturedepends on incoming power and radiation • Radiation heattransfer

  12. > IRES 2012> Breuer > 14.11.2012 Designing a testreceiverforuse in theThermal balancing - variationofmassflow (examplecalculation)

  13. > IRES 2012> Breuer > 14.11.2012 ConstructingandassemblingEngingeering - construction & development • Construction was carried out in a 3D CAD system • Material researchfor high temperaturesteel (1.4841) • Insulation material usedforbuildingthecavity (Al2O3) • Implementingthemeasurementsensorsfortemperature & pressure • Programming a controllingsystemwith LabView®

  14. > IRES 2012> Breuer > 14.11.2012 ConstructingandassemblingEngingeering - assemblingthereceiverfor solar simulator Thermocouples Solar radiation Steaminlet Steamoutlet Pressuremeasurement

  15. > IRES 2012> Breuer > 14.11.2012 Outlook • Thermal testcampains will beexecuted in novemberanddecember • Bilancingoftheexistingsystemwith experimental data • Optimizingthesystemwith experimental results • Build a full high temperatureelectrolysiscycle • Improvethereceiverandrebuilditwithnewlyadapteddata

  16. > IRES 2012> Breuer > 14.11.2012 Solar driventubularheatexchanger Thankyouforyourattention!

More Related