Novel microstructured polyol-polystyrene composites for seasonal heat storage

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPuupponen, Sallaen_US
dc.contributor.authorMikkola, Valtterien_US
dc.contributor.authorAla-Nissilä, Tapioen_US
dc.contributor.authorSeppälä, Arien_US
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorApplied Thermodynamicsen
dc.contributor.groupauthorMultiscale Statistical and Quantum Physicsen
dc.date.accessioned2021-05-05T06:20:13Z
dc.date.available2021-05-05T06:20:13Z
dc.date.issued2016-06-15en_US
dc.description.abstractWe propose a robust route to prepare novel supercooling microstructured phase change materials (PCMs) suitable for seasonal thermal energy storage (STES) or heat protection applications. Two supercooling polyols, erythritol and xylitol, are successfully prepared as novel microencapsulated PCM-polystyrene composites with polyol mass fractions of 62 wt% and 67 wt%, respectively, and average void diameter of ~50 μm. Thermal properties of the composites and bulk polyols are studied thoroughly with differential scanning calorimetry (DSC) and thermal conductivity analyzer. Significant differences in heat storage properties of microstructured and bulk PCM are observed. The heat release of microstructured erythritol is more controlled than that of bulk PCM, making the novel microengineered PCMs particularly interesting for STES. In the case of bulk PCM, the heat release may occur spontaneously due to crystallization by surface roughnesses or impurities, whereas these factors have only little impact on the crystallization of microstructured erythritol, making the novel composite more reliable for long-term heat storage purposes. In addition, microstructured polyol-polystyrene composites show anomalous enhancement in the specific heat as compared to bulk polyols. This enhancement may originate from strong polyol-surfactant interactions in the composites.en
dc.description.versionPeer revieweden
dc.format.extent11
dc.format.extent96-106
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPuupponen, S, Mikkola, V, Ala-Nissilä, T & Seppälä, A 2016, ' Novel microstructured polyol-polystyrene composites for seasonal heat storage ', Applied Energy, vol. 172, pp. 96-106 . https://doi.org/10.1016/j.apenergy.2016.03.023en
dc.identifier.doi10.1016/j.apenergy.2016.03.023en_US
dc.identifier.issn0306-2619
dc.identifier.issn1872-9118
dc.identifier.otherPURE UUID: ebde07aa-40dc-44e4-bda4-35d82f733de9en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/ebde07aa-40dc-44e4-bda4-35d82f733de9en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=84961910350&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/62350737/Novel_microstructured_polyol_polystyrene_submitted.23.2.2015_1.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/107261
dc.identifier.urnURN:NBN:fi:aalto-202105056525
dc.language.isoenen
dc.publisherELSEVIER SCI LTD
dc.relation.ispartofseriesApplied Energyen
dc.relation.ispartofseriesVolume 172en
dc.rightsopenAccessen
dc.subject.keywordCrystallizationen_US
dc.subject.keywordHigh internal phase emulsionen_US
dc.subject.keywordPolyolen_US
dc.subject.keywordSeasonal thermal energy storageen_US
dc.subject.keywordSupercoolingen_US
dc.titleNovel microstructured polyol-polystyrene composites for seasonal heat storageen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionacceptedVersion
Files