Long-term stable compressive elastocaloric cooling system with latent heat transfer
| Autor: | L. M. Maier, Andreas Mahlke, Kilian Bartholomé, Nora Bachmann, Thomas Koch, Olaf Schäfer-Welsen, Andreas Fitger |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Work (thermodynamics)
Materials science Physics QC1-999 Nuclear engineering Enhanced heat transfer Condensation Evaporation Elastocalorics General Physics and Astronomy long-term stability Astrophysics QB460-466 Stress (mechanics) cooling system heat transfer Heat transfer Water cooling ddc:620 Gas compressor environmetally friendly Engineering & allied operations |
| Zdroj: | Communications Physics, 4 (1), Art.-Nr.: 194 Communications Physics, Vol 4, Iss 1, Pp 1-6 (2021) |
| ISSN: | 2399-3650 |
| DOI: | 10.5445/ir/1000137450 |
| Popis: | Elastocaloric cooling systems can evolve into an environmentally friendly alternative to compressor-based cooling systems. One of the main factors preventing its application is a poor long-term stability of the elastocaloric material. This especially applies to systems that work with tensile loads and which benefit from the large surface area for heat transfer. Exerting compressive instead of tensile loads on the material increases long-term stability—though at the expense of cooling power density. Here, we present a heat transfer concept for elastocaloric systems where heat is transferred by evaporation and condensation of a fluid. Enhanced heat transfer rates allow us to choose the sample geometry more freely and thereby realize a compression-based system showing unprecedented long-term stability of 107 cycles and cooling power density of 6270 W kg−1. Elastocaloric materials exhibit temperature changes under applied stress and could be the basis for an environmentally friendly cooling system if issues with their long term stability can be addressed. Here, the authors design and build an elastocaloric device using evaporation and condensation of a fluid achieving enhanced specific cooling power and long term stability. |
| Databáze: | OpenAIRE |
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