Prediction of hydrogen desorption performance of Mg2Ni hydride reactors
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| Title: | Prediction of hydrogen desorption performance of Mg |
|---|---|
| Authors: | Chung, C.A.1,2 cachung@ncu.edu.tw, Lin, Ci-Siang1 |
| Source: | International Journal of Hydrogen Energy. Dec2009, Vol. 34 Issue 23, p9409-9423. 15p. |
| Subjects: | Hydrogen production, Energy storage, Least squares, Heat transfer, Mass transfer, Hydrides, Chemical reactors, Magnesium, Nickel, Simulation methods & models, Engineering design |
| Abstract: | Abstract: This work performs the simulation of hydrogen desorption processes with Mg2Ni hydrogen storage alloy to investigate the canister designs. Reaction rates and equilibrium pressures of Mg2Ni alloy were calculated by fitting experimental data in literature using least squares regression. The obtained reaction kinetics was used to model the thermalfluid behavior of hydrogen desorption. Since the alloy powders will expand and shrink during the absorption and desorption cycle, the canisters considered are comprised of expansion volume atop the metal bed. In order to enhance the heat transfer performance of the canister, an air pipe is equipped at the canister centre line with/without internal fins. Detailed equations that describe the force convection of the heat exchange pipe and the natural convection at the reactor wall are carefully incorporated in the model. Simulation results show that the bare cylindrical canister can not complete the desorption process in 2.8h, while the canister equipped with the concentric heat exchanger pipe and fins can complete desorption within 1.7h.Results also demonstrate that the reaction rates can be further increased by increasing the pipe flow velocity and/or increasing the fin volume. [Copyright &y& Elsevier] |
| Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 45080205 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Prediction of hydrogen desorption performance of Mg<subscript>2</subscript>Ni hydride reactors – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Chung%2C+C%2EA%2E%22">Chung, C.A.</searchLink><relatesTo>1,2</relatesTo><i> cachung@ncu.edu.tw</i><br /><searchLink fieldCode="AR" term="%22Lin%2C+Ci-Siang%22">Lin, Ci-Siang</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Dec2009, Vol. 34 Issue 23, p9409-9423. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br /><searchLink fieldCode="DE" term="%22Least+squares%22">Least squares</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrides%22">Hydrides</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactors%22">Chemical reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Magnesium%22">Magnesium</searchLink><br /><searchLink fieldCode="DE" term="%22Nickel%22">Nickel</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+design%22">Engineering design</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: This work performs the simulation of hydrogen desorption processes with Mg2Ni hydrogen storage alloy to investigate the canister designs. Reaction rates and equilibrium pressures of Mg2Ni alloy were calculated by fitting experimental data in literature using least squares regression. The obtained reaction kinetics was used to model the thermalfluid behavior of hydrogen desorption. Since the alloy powders will expand and shrink during the absorption and desorption cycle, the canisters considered are comprised of expansion volume atop the metal bed. In order to enhance the heat transfer performance of the canister, an air pipe is equipped at the canister centre line with/without internal fins. Detailed equations that describe the force convection of the heat exchange pipe and the natural convection at the reactor wall are carefully incorporated in the model. Simulation results show that the bare cylindrical canister can not complete the desorption process in 2.8h, while the canister equipped with the concentric heat exchanger pipe and fins can complete desorption within 1.7h.Results also demonstrate that the reaction rates can be further increased by increasing the pipe flow velocity and/or increasing the fin volume. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ijhydene.2009.09.061 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 9409 Subjects: – SubjectFull: Hydrogen production Type: general – SubjectFull: Energy storage Type: general – SubjectFull: Least squares Type: general – SubjectFull: Heat transfer Type: general – SubjectFull: Mass transfer Type: general – SubjectFull: Hydrides Type: general – SubjectFull: Chemical reactors Type: general – SubjectFull: Magnesium Type: general – SubjectFull: Nickel Type: general – SubjectFull: Simulation methods & models Type: general – SubjectFull: Engineering design Type: general Titles: – TitleFull: Prediction of hydrogen desorption performance of Mg2Ni hydride reactors Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Chung, C.A. – PersonEntity: Name: NameFull: Lin, Ci-Siang IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 03603199 Numbering: – Type: volume Value: 34 – Type: issue Value: 23 Titles: – TitleFull: International Journal of Hydrogen Energy Type: main |
| ResultId | 1 |
