| Title: | Liquid crystal based active electrocaloric regenerator |
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| Authors: | ID Dobovišek, Andrej (Author)
ID Ambrožič, Milan (Author)
ID Kutnjak, Zdravko (Author)
ID Kralj, Samo (Author) |
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| Files: |  https://www.sciencedirect.com/science/article/pii/S2405844023012422?via%3Dihub
 RAZ_Dobovisek_Andrej_2023.pdf (3,23 MB)
MD5: AA799E3AC16A7ACED09654B04A7FA1FB
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FNM - Faculty of Natural Sciences and Mathematics
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| Abstract: | The active electrocaloric (EC) regenerator exploiting electric conversion into thermal energy has recently become important for developing a new generation of heat-management devices. We analyze an active EC regenerator numerically. We establish a temperature span across the regenerator ΔT by commuting a liquid crystalline (LC) unit between regions with and without an external electric field E. In modelling, we use Landau-de Gennes mesoscopic approach, focusing on the temperature regime where isotropic (paranematic) and nematic phase order compete. We determined conditions enabling a large enough value of ΔT suitable for potential applications. In particular, (i) the vicinity of the paranematic-nematic (P–N) phase transition, (ii) large enough latent heat of the transition, (iii) strong enough applied external field (exceeding the critical field Ec at which the P–N transition becomes gradual), and (iv) relatively short contact times between LC unit and heat sink and heat source reservoirs are advantageous. Our analysis reveals that Δ T >> 1K could be achieved using appropriate LC material. |
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| Keywords: | liquid crystals, electrocaloric effect, phase behavior |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 28.12.2022 |
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| Article acceptance date: | 20.02.2023 |
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| Publication date: | 24.02.2023 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 1-12 |
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| Numbering: | Vol 9, iss. 3, [article no.] e14035 |
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| PID: | 20.500.12556/DKUM-88457  |
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| UDC: | 532.783 |
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| ISSN on article: | 2405-8440 |
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| COBISS.SI-ID: | 143422211 |
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| DOI: | 10.1016/j.heliyon.2023.e14035 |
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| Publication date in DKUM: | 18.09.2024 |
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| Views: | 247 |
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| Downloads: | 14 |
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| Metadata: |    |
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| Categories: | Misc.
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