20.500.12556/DKUM-88457 Liquid crystal based active electrocaloric regenerator 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. liquid crystals electrocaloric effect phase behavior elektrokalorični učinek fazno obnašanje true true true Elsevier Angleški jezik Slovenski jezik Članek v reviji 2024-04-27 03:33:32 2024-09-18 13:21:52 2024-09-19 03:10:24 0000-00-00 00:00:00 2023 0 0 str. 1-12 iss. 3, [article no.] e14035 Vol 9 Mar. 2023 0000-00-00 Zaloznikova Objavljeno apc 2022-12-28 2023-02-20 2023-02-24 532.783 143422211 10.1016/j.heliyon.2023.e14035 2405-8440 https://www.sciencedirect.com/science/article/pii/S2405844023012422?via%3Dihub 1 2c55720c-0436-11ef-9b1b-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=178936 RAZ_Dobovisek_Andrej_2023.pdf RAZ_Dobovisek_Andrej_2023.pdf 1 AA799E3AC16A7ACED09654B04A7FA1FB 2db5c1f67c36ab520a73fec12e31214a5eb392f6a91e35450f05412b3fe82326 e554bbf7-75af-11ef-8939-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=185410 Fakulteta za naravoslovje in matematiko 0 0 0