Modeling of hydrogen liquefaction using magnetocaloric cycles with permanent magnets.
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| Title: | Modeling of hydrogen liquefaction using magnetocaloric cycles with permanent magnets. |
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| Authors: | Feng, Tianshi1 (AUTHOR), Chen, Renkun1,2 (AUTHOR) rkchen@ucsd.edu, Ihnfeldt, Robin V.2 (AUTHOR) rihnfeldt@geandr.com |
| Source: | International Journal of Refrigeration. Nov2020, Vol. 119, p238-246. 9p. |
| Subjects: | Permanent magnets, Soil liquefaction, Vapor compression cycle, Superconducting magnets, Biomass liquefaction, Fuel cell vehicles, Cooling systems, Heat sinks, Hydrogen |
| Abstract: | • Modeled hydrogen liquefication from 80 to 20 K in a multi-stage AMR system using permanent magnets with 1-Tesla field. • Achieved over 60% of Carnot COP with the multistage design with optimized operation conditions. • Compared two types of 1D AMR models: steady state and time-dependent models. Hydrogen (H 2) is promising alternative to replace fossil fuels, but its transport and storage has been challenging. As H 2 fuel cell vehicles are gaining traction, the infrastructure for storing large amounts of liquid H 2 is needed. However, liquid H 2 would suffer from boil-off loss, and traditional vapor compression refrigeration systems would not be able to economically recover the lost H 2 due to the low efficiencies at cryogenic temperature. Magnetocaloric (MC) refrigeration systems could possess much higher coefficient of performance (COP) at cryogenic temperature compared to the vapor compression ones. Previous work on cryogenic MC systems, however, have only focused on large scale applications which use superconducting magnets to provide a large magnetic field but are prohibitively expensive to operate for small scale applications, such as that of a H 2 refilling station. In this work, we model the performance of a MC refrigeration cycle using 1-Tesla permanent magnets for H 2 liquefaction, with the objective of cooling H 2 from 80 K (using liquid nitrogen as the heat sink) to 20 K (boiling point of hydrogen). We evaluate main performance metrics including the total work input to the refrigeration system, COP, total MCM mass in the system, and total volume of the permanent magnets, etc. Our modeling results indicate that such a permanent magnet-based MC cooling system is feasible for small-scale H 2 liquefaction, with projected COP values significantly higher than those of vapor compression systems. This work provides design guidelines for future experimental efforts on permanent magnet MC cooling systems for cryogenic cooling. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Refrigeration is the property of Elsevier B.V. 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: 146397565 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Modeling of hydrogen liquefaction using magnetocaloric cycles with permanent magnets. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Feng%2C+Tianshi%22">Feng, Tianshi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Renkun%22">Chen, Renkun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> rkchen@ucsd.edu</i><br /><searchLink fieldCode="AR" term="%22Ihnfeldt%2C+Robin+V%2E%22">Ihnfeldt, Robin V.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> rihnfeldt@geandr.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Refrigeration%22">International Journal of Refrigeration</searchLink>. Nov2020, Vol. 119, p238-246. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Permanent+magnets%22">Permanent magnets</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+liquefaction%22">Soil liquefaction</searchLink><br /><searchLink fieldCode="DE" term="%22Vapor+compression+cycle%22">Vapor compression cycle</searchLink><br /><searchLink fieldCode="DE" term="%22Superconducting+magnets%22">Superconducting magnets</searchLink><br /><searchLink fieldCode="DE" term="%22Biomass+liquefaction%22">Biomass liquefaction</searchLink><br /><searchLink fieldCode="DE" term="%22Fuel+cell+vehicles%22">Fuel cell vehicles</searchLink><br /><searchLink fieldCode="DE" term="%22Cooling+systems%22">Cooling systems</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+sinks%22">Heat sinks</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen%22">Hydrogen</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: • Modeled hydrogen liquefication from 80 to 20 K in a multi-stage AMR system using permanent magnets with 1-Tesla field. • Achieved over 60% of Carnot COP with the multistage design with optimized operation conditions. • Compared two types of 1D AMR models: steady state and time-dependent models. Hydrogen (H 2) is promising alternative to replace fossil fuels, but its transport and storage has been challenging. As H 2 fuel cell vehicles are gaining traction, the infrastructure for storing large amounts of liquid H 2 is needed. However, liquid H 2 would suffer from boil-off loss, and traditional vapor compression refrigeration systems would not be able to economically recover the lost H 2 due to the low efficiencies at cryogenic temperature. Magnetocaloric (MC) refrigeration systems could possess much higher coefficient of performance (COP) at cryogenic temperature compared to the vapor compression ones. Previous work on cryogenic MC systems, however, have only focused on large scale applications which use superconducting magnets to provide a large magnetic field but are prohibitively expensive to operate for small scale applications, such as that of a H 2 refilling station. In this work, we model the performance of a MC refrigeration cycle using 1-Tesla permanent magnets for H 2 liquefaction, with the objective of cooling H 2 from 80 K (using liquid nitrogen as the heat sink) to 20 K (boiling point of hydrogen). We evaluate main performance metrics including the total work input to the refrigeration system, COP, total MCM mass in the system, and total volume of the permanent magnets, etc. Our modeling results indicate that such a permanent magnet-based MC cooling system is feasible for small-scale H 2 liquefaction, with projected COP values significantly higher than those of vapor compression systems. This work provides design guidelines for future experimental efforts on permanent magnet MC cooling systems for cryogenic cooling. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Refrigeration is the property of Elsevier B.V. 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.ijrefrig.2020.06.032 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 238 Subjects: – SubjectFull: Permanent magnets Type: general – SubjectFull: Soil liquefaction Type: general – SubjectFull: Vapor compression cycle Type: general – SubjectFull: Superconducting magnets Type: general – SubjectFull: Biomass liquefaction Type: general – SubjectFull: Fuel cell vehicles Type: general – SubjectFull: Cooling systems Type: general – SubjectFull: Heat sinks Type: general – SubjectFull: Hydrogen Type: general Titles: – TitleFull: Modeling of hydrogen liquefaction using magnetocaloric cycles with permanent magnets. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Feng, Tianshi – PersonEntity: Name: NameFull: Chen, Renkun – PersonEntity: Name: NameFull: Ihnfeldt, Robin V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 01407007 Numbering: – Type: volume Value: 119 Titles: – TitleFull: International Journal of Refrigeration Type: main |
| ResultId | 1 |
