Relationship between thermoelectric figure of merit and energy conversion efficiency
A multiwavenumber theory is formulated to represent eddy diffusivities. It expands on earlier single-wavenumber theories and includes the wide range of wavenumbers encompassed in eddy motions. In the limiting case in which ocean eddies are only composed of a single wavenumber, the multiwavenumber th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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National Academy of Sciences (U.S.)
2016
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| Online Access: | http://hdl.handle.net/1721.1/101109 https://orcid.org/0000-0002-3968-8530 |
| _version_ | 1826198165472149504 |
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| author | Kim, Hee Seok Liu, Weishu Chen, Gang Chu, Ching-Wu Ren, Zhifeng |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Kim, Hee Seok Liu, Weishu Chen, Gang Chu, Ching-Wu Ren, Zhifeng |
| author_sort | Kim, Hee Seok |
| collection | MIT |
| description | A multiwavenumber theory is formulated to represent eddy diffusivities. It expands on earlier single-wavenumber theories and includes the wide range of wavenumbers encompassed in eddy motions. In the limiting case in which ocean eddies are only composed of a single wavenumber, the multiwavenumber theory is equivalent to the single-wavenumber theory and both show mixing suppression by the eddy propagation relative to the mean flow. The multiwavenumber theory was tested in a region of the Southern Ocean (70°–45°S, 110°–20°W) that covers the Drake Passage and includes the tracer/float release locations during the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES). Cross-stream eddy diffusivities and mixing lengths were estimated in this region from the single-wavenumber theory, from the multiwavenumber theory, and from floats deployed in a global k[subscript 0]° Parallel Ocean Program (POP) simulation. Compared to the single-wavenumber theory, the horizontal structures of cross-stream mixing lengths from the multiwavenumber theory agree better with the simulated float-based estimates at almost all depth levels. The multiwavenumber theory better represents the vertical structure of cross-stream mixing lengths both inside and outside the Antarctica Circumpolar Current (ACC). Both the single-wavenumber and multiwavenumber theories represent the horizontal structures of cross-stream diffusivities, which resemble the eddy kinetic energy patterns. |
| first_indexed | 2024-09-23T11:00:13Z |
| format | Article |
| id | mit-1721.1/101109 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:00:13Z |
| publishDate | 2016 |
| publisher | National Academy of Sciences (U.S.) |
| record_format | dspace |
| spelling | mit-1721.1/1011092022-09-27T16:27:12Z Relationship between thermoelectric figure of merit and energy conversion efficiency Kim, Hee Seok Liu, Weishu Chen, Gang Chu, Ching-Wu Ren, Zhifeng Massachusetts Institute of Technology. Department of Mechanical Engineering Chen, Gang A multiwavenumber theory is formulated to represent eddy diffusivities. It expands on earlier single-wavenumber theories and includes the wide range of wavenumbers encompassed in eddy motions. In the limiting case in which ocean eddies are only composed of a single wavenumber, the multiwavenumber theory is equivalent to the single-wavenumber theory and both show mixing suppression by the eddy propagation relative to the mean flow. The multiwavenumber theory was tested in a region of the Southern Ocean (70°–45°S, 110°–20°W) that covers the Drake Passage and includes the tracer/float release locations during the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES). Cross-stream eddy diffusivities and mixing lengths were estimated in this region from the single-wavenumber theory, from the multiwavenumber theory, and from floats deployed in a global k[subscript 0]° Parallel Ocean Program (POP) simulation. Compared to the single-wavenumber theory, the horizontal structures of cross-stream mixing lengths from the multiwavenumber theory agree better with the simulated float-based estimates at almost all depth levels. The multiwavenumber theory better represents the vertical structure of cross-stream mixing lengths both inside and outside the Antarctica Circumpolar Current (ACC). Both the single-wavenumber and multiwavenumber theories represent the horizontal structures of cross-stream diffusivities, which resemble the eddy kinetic energy patterns. United States. Dept. of Energy (Contract DOE DE-FG02-13ER46917/DE-SC0010831) United States. Dept. of Energy. Office of Science (Solid-State Solar-Thermal Energy Conversion Center Award DE-SC0001299) United States. Air Force Office of Scientific Research (Grant FA9550-09-1-0656) Templeton Foundation John J. and Rebecca Moores Endowment University of Houston. Texas Center for Superconductivity 2016-02-05T12:37:20Z 2016-02-05T12:37:20Z 2015-07 2015-04 Article http://purl.org/eprint/type/JournalArticle 0027-8424 1091-6490 http://hdl.handle.net/1721.1/101109 Kim, Hee Seok, Weishu Liu, Gang Chen, Ching-Wu Chu, and Zhifeng Ren. “Relationship Between Thermoelectric Figure of Merit and Energy Conversion Efficiency.” Proc Natl Acad Sci USA 112, no. 27 (June 22, 2015): 8205–8210. © 2015 American Meteorological Society https://orcid.org/0000-0002-3968-8530 en_US http://dx.doi.org/10.1073/pnas.1510231112 Proceedings of the National Academy of Sciences Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf National Academy of Sciences (U.S.) National Academy of Sciences (U.S.) |
| spellingShingle | Kim, Hee Seok Liu, Weishu Chen, Gang Chu, Ching-Wu Ren, Zhifeng Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title | Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title_full | Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title_fullStr | Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title_full_unstemmed | Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title_short | Relationship between thermoelectric figure of merit and energy conversion efficiency |
| title_sort | relationship between thermoelectric figure of merit and energy conversion efficiency |
| url | http://hdl.handle.net/1721.1/101109 https://orcid.org/0000-0002-3968-8530 |
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