Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials
Materials designed to undergo a phase transition at a prescribed temperature have been advanced as elements for controlling thermal flux. Such phase change materials can be used as components of reversible thermal diodes, or materials that favor heat flux in a preferred direction; however, a thoroug...
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| Format: | Article |
| Language: | en_US |
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Wiley Blackwell
2016
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| Online Access: | http://hdl.handle.net/1721.1/102318 https://orcid.org/0000-0002-1096-7413 https://orcid.org/0000-0003-2944-808X |
| _version_ | 1826199441972920320 |
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| author | Strano, Michael S. Cottrill, Anton Lee |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Strano, Michael S. Cottrill, Anton Lee |
| author_sort | Strano, Michael S. |
| collection | MIT |
| description | Materials designed to undergo a phase transition at a prescribed temperature have been advanced as elements for controlling thermal flux. Such phase change materials can be used as components of reversible thermal diodes, or materials that favor heat flux in a preferred direction; however, a thorough mathematical analysis of such diodes is thus far absent from the literature. Herein, it is shown mathematically that the interface of a phase change material with a phase invariant one can function as a simple thermal diode. Design equations are derived for such phase change diodes, solving for the limits where the transition temperature falls within or outside of the temperature gradient across the device. Criteria are derived analytically for the choice of thermal conductivity of the invariant phase to maximize the rectification ratio. Finally, the model is applied to several experimental systems in the literature, providing bounds on observed performance. This model should aid in the development of materials capable of controlling heat flux. |
| first_indexed | 2024-09-23T11:19:57Z |
| format | Article |
| id | mit-1721.1/102318 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:19:57Z |
| publishDate | 2016 |
| publisher | Wiley Blackwell |
| record_format | dspace |
| spelling | mit-1721.1/1023182022-09-27T18:49:12Z Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials Strano, Michael S. Cottrill, Anton Lee Massachusetts Institute of Technology. Department of Chemical Engineering Strano, Michael S. Cottrill, Anton Lee Strano, Michael S. Materials designed to undergo a phase transition at a prescribed temperature have been advanced as elements for controlling thermal flux. Such phase change materials can be used as components of reversible thermal diodes, or materials that favor heat flux in a preferred direction; however, a thorough mathematical analysis of such diodes is thus far absent from the literature. Herein, it is shown mathematically that the interface of a phase change material with a phase invariant one can function as a simple thermal diode. Design equations are derived for such phase change diodes, solving for the limits where the transition temperature falls within or outside of the temperature gradient across the device. Criteria are derived analytically for the choice of thermal conductivity of the invariant phase to maximize the rectification ratio. Finally, the model is applied to several experimental systems in the literature, providing bounds on observed performance. This model should aid in the development of materials capable of controlling heat flux. United States. Air Force Office of Scientific Research (Award FA9550-09-1-0700) 2016-04-28T14:29:19Z 2016-04-28T14:29:19Z 2015-09 2015-07 Article http://purl.org/eprint/type/JournalArticle 16146832 1614-6840 http://hdl.handle.net/1721.1/102318 Cottrill, Anton L., and Michael S. Strano. “Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials.” Adv. Energy Mater. 5, no. 23 (September 10, 2015): n/a–n/a. https://orcid.org/0000-0002-1096-7413 https://orcid.org/0000-0003-2944-808X en_US http://dx.doi.org/10.1002/aenm.201500921 Advanced Energy Materials Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Wiley Blackwell Prof. Strano via Erja Kajosalo |
| spellingShingle | Strano, Michael S. Cottrill, Anton Lee Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title | Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title_full | Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title_fullStr | Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title_full_unstemmed | Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title_short | Analysis of Thermal Diodes Enabled by Junctions of Phase Change Materials |
| title_sort | analysis of thermal diodes enabled by junctions of phase change materials |
| url | http://hdl.handle.net/1721.1/102318 https://orcid.org/0000-0002-1096-7413 https://orcid.org/0000-0003-2944-808X |
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