Efficiency Improvement of Miniaturized Heat Exchangers
Micro heat exchangers have been revealed to be efficient devices for improved heat transfer due to short heat transfer distances and increased surface-to-volume ratios. Further augmentation of the heat transfer behaviour within microstructured devices can be achieved with heat transfer enhancement t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/6/1/25 |
| _version_ | 1797542245310660608 |
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| author | Iris Gerken Thomas Wetzel Jürgen J. Brandner |
| author_facet | Iris Gerken Thomas Wetzel Jürgen J. Brandner |
| author_sort | Iris Gerken |
| collection | DOAJ |
| description | Micro heat exchangers have been revealed to be efficient devices for improved heat transfer due to short heat transfer distances and increased surface-to-volume ratios. Further augmentation of the heat transfer behaviour within microstructured devices can be achieved with heat transfer enhancement techniques, and more precisely for this study, with passive enhancement techniques. Pin fin geometries influence the flow path and, therefore, were chosen as the option for further improvement of the heat transfer performance. The augmentation of heat transfer with micro heat exchangers was performed with the consideration of an improved heat transfer behaviour, and with additional pressure losses due to the change of flow path (pin fin geometries). To capture the impact of the heat transfer, as well as the impact of additional pressure losses, an assessment method should be considered. The overall exergy loss method can be applied to micro heat exchangers, and serves as a simple assessment for characterization. Experimental investigations with micro heat exchanger structures were performed to evaluate the assessment method and its importance. The heat transfer enhancement was experimentally investigated with microstructured pin fin geometries to understand the impact on pressure loss behaviour with air. |
| first_indexed | 2024-03-10T13:26:58Z |
| format | Article |
| id | doaj.art-4d14098f02f8436d94aec7194c31b189 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T13:26:58Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-4d14098f02f8436d94aec7194c31b1892023-11-21T08:44:27ZengMDPI AGFluids2311-55212021-01-01612510.3390/fluids6010025Efficiency Improvement of Miniaturized Heat ExchangersIris Gerken0Thomas Wetzel1Jürgen J. Brandner2Safetec Entsorgungs- und Sicherheitstechnik GmbH, Kurpfalzring 98a, 69123 Heidelberg, GermanyInstitute for Thermal Process Engineering, Karlsruhe Institute of Technology KIT, CS, Kaiserstrasse 12, 76131 Karlsruhe, GermanyInstitute of Microstructure Technology IMT, Karlsruhe Institute of Technology KIT, CN, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, GermanyMicro heat exchangers have been revealed to be efficient devices for improved heat transfer due to short heat transfer distances and increased surface-to-volume ratios. Further augmentation of the heat transfer behaviour within microstructured devices can be achieved with heat transfer enhancement techniques, and more precisely for this study, with passive enhancement techniques. Pin fin geometries influence the flow path and, therefore, were chosen as the option for further improvement of the heat transfer performance. The augmentation of heat transfer with micro heat exchangers was performed with the consideration of an improved heat transfer behaviour, and with additional pressure losses due to the change of flow path (pin fin geometries). To capture the impact of the heat transfer, as well as the impact of additional pressure losses, an assessment method should be considered. The overall exergy loss method can be applied to micro heat exchangers, and serves as a simple assessment for characterization. Experimental investigations with micro heat exchanger structures were performed to evaluate the assessment method and its importance. The heat transfer enhancement was experimentally investigated with microstructured pin fin geometries to understand the impact on pressure loss behaviour with air.https://www.mdpi.com/2311-5521/6/1/25micro heat exchangerenhanced heat transferpin-fin microstructurethermal efficiencyexergy lossesthermal exergy loss |
| spellingShingle | Iris Gerken Thomas Wetzel Jürgen J. Brandner Efficiency Improvement of Miniaturized Heat Exchangers Fluids micro heat exchanger enhanced heat transfer pin-fin microstructure thermal efficiency exergy losses thermal exergy loss |
| title | Efficiency Improvement of Miniaturized Heat Exchangers |
| title_full | Efficiency Improvement of Miniaturized Heat Exchangers |
| title_fullStr | Efficiency Improvement of Miniaturized Heat Exchangers |
| title_full_unstemmed | Efficiency Improvement of Miniaturized Heat Exchangers |
| title_short | Efficiency Improvement of Miniaturized Heat Exchangers |
| title_sort | efficiency improvement of miniaturized heat exchangers |
| topic | micro heat exchanger enhanced heat transfer pin-fin microstructure thermal efficiency exergy losses thermal exergy loss |
| url | https://www.mdpi.com/2311-5521/6/1/25 |
| work_keys_str_mv | AT irisgerken efficiencyimprovementofminiaturizedheatexchangers AT thomaswetzel efficiencyimprovementofminiaturizedheatexchangers AT jurgenjbrandner efficiencyimprovementofminiaturizedheatexchangers |