Npj thermal science and engineering最新文献

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Design and modeling of area-enhanced, bi-porous, evaporative macrochannel for building facade cooling. 建筑立面增强型双孔蒸发大通道冷却设计与建模。
Npj thermal science and engineering Pub Date : 2026-01-01 Epub Date: 2026-10-07 DOI: 10.1038/s44435-026-00021-6
Gautier Rouaze, Zhengmao Lu
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引用次数: 0
Ferroelectric nematic liquid crystals: temperature-tunable electrocaloric fluids with large strength at low fields. 铁电向列液晶:在低场下具有大强度的温度可调的电热流体。
Npj thermal science and engineering Pub Date : 2026-01-01 Epub Date: 2026-10-07 DOI: 10.1038/s44435-026-00019-0
Diana I Nikolova, Rachel Tuffin, Mengfan Guo, Neil D Mathur, Xavier Moya, Peter Tipping, Richard J Mandle, Helen F Gleeson
{"title":"Ferroelectric nematic liquid crystals: temperature-tunable electrocaloric fluids with large strength at low fields.","authors":"Diana I Nikolova, Rachel Tuffin, Mengfan Guo, Neil D Mathur, Xavier Moya, Peter Tipping, Richard J Mandle, Helen F Gleeson","doi":"10.1038/s44435-026-00019-0","DOIUrl":"10.1038/s44435-026-00019-0","url":null,"abstract":"<p><p>The electrocaloric (EC) effect offers a promising energy-efficient and clean cooling technology. We present the first direct measurements of EC temperature change in a new family of EC fluids, ferroelectric nematic liquid crystals (FNLCs), demonstrating in two such materials temperature jumps of <i>|</i>Δ<i>T</i> <sub><i>j</i></sub> <i>|</i> ~ 0.2 K for field changes as low as Δ<i>E</i> ~ 0.1 V μm<sup>-1</sup>. Indirect measurements of adiabatic temperature change <math><mrow><mi>|</mi> <mi>Δ</mi> <mi>T|</mi></mrow> </math> confirm that these direct measurements are an underestimate and that Δ<i>E</i> = 2 V μm<sup>-1</sup> can induce up to <i>|</i>Δ<i>T</i> <sub><i>j</i></sub> <i>|</i> ~ 1.6 K, yielding EC strengths <i>|</i>Δ<i>T/</i>Δ<i>E|</i> up to 100% higher than incumbent materials. For temperature spans of 5-10 K, we predict a coefficient of performance of ~21-40. We find |Δ<i>T|~1</i> K for >100 FNLCs that collectively span all temperatures between 0 ˚C and 100 ˚C. This, together with the new device concepts conceivable with fluid EC materials, offers huge potential for cooling applications.</p>","PeriodicalId":524255,"journal":{"name":"Npj thermal science and engineering","volume":"1 1","pages":"18"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13671268/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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