MILD combustion of hydrogen and air – An efficient modelling approach in CFD validated by experimental data

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorMayrhofer, Markusen_US
dc.contributor.authorKoller, Michaelen_US
dc.contributor.authorSeemann, Peteren_US
dc.contributor.authorBordbar, Hadien_US
dc.contributor.authorPrieler, Reneen_US
dc.contributor.authorHochenauer, Christophen_US
dc.contributor.departmentEbner Industrieofenbau GmbHen_US
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.contributor.departmentGraz University of Technologyen_US
dc.date.accessioned2022-02-09T06:51:35Z
dc.date.available2022-02-09T06:51:35Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2024-01-29en_US
dc.date.issued2022-01-29en_US
dc.descriptionFunding Information: This work was supported by the Ebner Industrieofenbau GmbH and the Institute of Thermal Engineering , Graz University of Technology . Publisher Copyright: © 2021 Hydrogen Energy Publications LLC
dc.description.abstractThe present work deals with the development of an efficient modelling approach for the flameless combustion of pure hydrogen with highly preheated air. It contains an application of different flamelet-based combustion models to achieve convergence in a computationally cheap way in contrast to time consuming methods such as the Eddy Dissipation Concept (EDC) model. Moreover, an evaluation of three detailed reaction mechanisms for the application of flameless hydrogen combustion is also included. The selection and implementation of a “Weighted Sum of Gray Gas” (WSGG) model to predict the radiative heat transfer as accurate as possible constitutes another important goal in the present work. The results of all modelling approaches were compared with extensive temperature measurements in the reaction zone. Additional temperatures of the test rig's control thermocouples were also compared with the results of the simulation to strengthen the validation. Maximum temperature deviation in the burner's axis of about 50 K can be achieved. Furthermore, the experimental and numerical results in this paper were compared with the results of flameless combustion of natural gas at equal furnace conditions and the same burner test rig. Higher temperatures in the burner axis up to a distance of 1855 mm were observed at hydrogen operation with a maximum difference of about 150 K to the natural gas case. A concluding evaluation of the furnace efficiency showed an increase by about 7% by changing the fuel from natural gas to hydrogen. This is achieved by reduced flue gas loss and an improved heat transfer.en
dc.description.versionPeer revieweden
dc.format.extent16
dc.format.extent6349-6364
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationMayrhofer , M , Koller , M , Seemann , P , Bordbar , H , Prieler , R & Hochenauer , C 2022 , ' MILD combustion of hydrogen and air – An efficient modelling approach in CFD validated by experimental data ' , International Journal of Hydrogen Energy , vol. 47 , no. 9 , pp. 6349-6364 . https://doi.org/10.1016/j.ijhydene.2021.11.236en
dc.identifier.doi10.1016/j.ijhydene.2021.11.236en_US
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.otherPURE UUID: 8bdc0161-6541-487e-896c-6de13618d12een_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/8bdc0161-6541-487e-896c-6de13618d12een_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85121435501&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/79119560/ENG_Mayrhofer_et_al_MILD_combustion_of_hydrogen_and_air_International_Journal_of_Hydrogen_Energy.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/112948
dc.identifier.urnURN:NBN:fi:aalto-202202091841
dc.language.isoenen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofseriesInternational Journal of Hydrogen Energyen
dc.relation.ispartofseriesVolume 47, issue 9en
dc.rightsopenAccessen
dc.subject.keywordFlamelet Modelsen_US
dc.subject.keywordHydrogenen_US
dc.subject.keywordMILD Combustionen_US
dc.subject.keywordWSGG Modelsen_US
dc.titleMILD combustion of hydrogen and air – An efficient modelling approach in CFD validated by experimental dataen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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