A Compact Thermally Driven Cooling System Based on Metal Hydrides
Independent of the actual power train, efficiency and a high driving range in any weather conditions are two key requirements for future vehicles. Especially during summertime, thermally driven air conditioning systems can contribute to this goal as they can turn the exhaust heat of internal combust...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/10/2482 |
| _version_ | 1797567997784621056 |
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| author | Christoph Weckerle Marius Dörr Marc Linder Inga Bürger |
| author_facet | Christoph Weckerle Marius Dörr Marc Linder Inga Bürger |
| author_sort | Christoph Weckerle |
| collection | DOAJ |
| description | Independent of the actual power train, efficiency and a high driving range in any weather conditions are two key requirements for future vehicles. Especially during summertime, thermally driven air conditioning systems can contribute to this goal as they can turn the exhaust heat of internal combustion engines, fuel cells or of any additional fuel-based heating system into a cooling effect. Amongst these, metal hydride cooling systems (MHCSs) promise very high specific power densities due to the short reaction times as well as high reaction enthalpies. Additionally, the working fluid hydrogen has a very low global warming potential. In this study, the experimental results of a compact and modular MHCS with a specific cooling power of up to 585 W <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mi>kg</mi> <mi>MH</mi> <mrow> <mo>−</mo> <mn>1</mn> </mrow> </msubsup> </mrow> </semantics> </math> </inline-formula> referred to one cold generating MH are presented, while reactor and MH weight in total is less than 30 kg and require a volume < 20 dm<sup>3</sup>. The system is driven by an auxiliary fuel heating system and its performance is evaluated for different operating conditions, e.g., temperature levels and half-cycle times. Additionally, a novel operation optimization of time-shifted valve switching to increase the cooling power is implemented and investigated in detail. |
| first_indexed | 2024-03-10T19:50:07Z |
| format | Article |
| id | doaj.art-f7a522ac5a6f43138f7a24ba260f6e3a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T19:50:07Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f7a522ac5a6f43138f7a24ba260f6e3a2023-11-20T00:30:25ZengMDPI AGEnergies1996-10732020-05-011310248210.3390/en13102482A Compact Thermally Driven Cooling System Based on Metal HydridesChristoph Weckerle0Marius Dörr1Marc Linder2Inga Bürger3Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, D-70569 Stuttgart, GermanyInstitute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, D-70569 Stuttgart, GermanyInstitute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, D-70569 Stuttgart, GermanyInstitute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38-40, D-70569 Stuttgart, GermanyIndependent of the actual power train, efficiency and a high driving range in any weather conditions are two key requirements for future vehicles. Especially during summertime, thermally driven air conditioning systems can contribute to this goal as they can turn the exhaust heat of internal combustion engines, fuel cells or of any additional fuel-based heating system into a cooling effect. Amongst these, metal hydride cooling systems (MHCSs) promise very high specific power densities due to the short reaction times as well as high reaction enthalpies. Additionally, the working fluid hydrogen has a very low global warming potential. In this study, the experimental results of a compact and modular MHCS with a specific cooling power of up to 585 W <inline-formula> <math display="inline"> <semantics> <mrow> <msubsup> <mi>kg</mi> <mi>MH</mi> <mrow> <mo>−</mo> <mn>1</mn> </mrow> </msubsup> </mrow> </semantics> </math> </inline-formula> referred to one cold generating MH are presented, while reactor and MH weight in total is less than 30 kg and require a volume < 20 dm<sup>3</sup>. The system is driven by an auxiliary fuel heating system and its performance is evaluated for different operating conditions, e.g., temperature levels and half-cycle times. Additionally, a novel operation optimization of time-shifted valve switching to increase the cooling power is implemented and investigated in detail.https://www.mdpi.com/1996-1073/13/10/2482metal hydridemetal hydride cooling systemair conditioningsorption systemthermal management |
| spellingShingle | Christoph Weckerle Marius Dörr Marc Linder Inga Bürger A Compact Thermally Driven Cooling System Based on Metal Hydrides Energies metal hydride metal hydride cooling system air conditioning sorption system thermal management |
| title | A Compact Thermally Driven Cooling System Based on Metal Hydrides |
| title_full | A Compact Thermally Driven Cooling System Based on Metal Hydrides |
| title_fullStr | A Compact Thermally Driven Cooling System Based on Metal Hydrides |
| title_full_unstemmed | A Compact Thermally Driven Cooling System Based on Metal Hydrides |
| title_short | A Compact Thermally Driven Cooling System Based on Metal Hydrides |
| title_sort | compact thermally driven cooling system based on metal hydrides |
| topic | metal hydride metal hydride cooling system air conditioning sorption system thermal management |
| url | https://www.mdpi.com/1996-1073/13/10/2482 |
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