Novel microstructured polyol-polystyrene composites for seasonal heat storage

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Novel microstructured polyol-polystyrene composites for seasonal heat storage. / Puupponen, Salla; Mikkola, Valtteri; Ala-Nissilä, Tapio; Seppälä, Ari.

julkaisussa: Applied Energy, Vuosikerta 172, 15.06.2016, s. 96-106.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Puupponen, Salla ; Mikkola, Valtteri ; Ala-Nissilä, Tapio ; Seppälä, Ari. / Novel microstructured polyol-polystyrene composites for seasonal heat storage. Julkaisussa: Applied Energy. 2016 ; Vuosikerta 172. Sivut 96-106.

Bibtex - Lataa

@article{ebde07aa40dc44e4bda435d82f733de9,
title = "Novel microstructured polyol-polystyrene composites for seasonal heat storage",
abstract = "We 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.",
keywords = "Crystallization, High internal phase emulsion, Polyol, Seasonal thermal energy storage, Supercooling",
author = "Salla Puupponen and Valtteri Mikkola and Tapio Ala-Nissil{\"a} and Ari Sepp{\"a}l{\"a}",
year = "2016",
month = "6",
day = "15",
doi = "10.1016/j.apenergy.2016.03.023",
language = "English",
volume = "172",
pages = "96--106",
journal = "Applied Energy",
issn = "0306-2619",

}

RIS - Lataa

TY - JOUR

T1 - Novel microstructured polyol-polystyrene composites for seasonal heat storage

AU - Puupponen, Salla

AU - Mikkola, Valtteri

AU - Ala-Nissilä, Tapio

AU - Seppälä, Ari

PY - 2016/6/15

Y1 - 2016/6/15

N2 - We 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.

AB - We 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.

KW - Crystallization

KW - High internal phase emulsion

KW - Polyol

KW - Seasonal thermal energy storage

KW - Supercooling

UR - http://www.scopus.com/inward/record.url?scp=84961910350&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2016.03.023

DO - 10.1016/j.apenergy.2016.03.023

M3 - Article

AN - SCOPUS:84961910350

VL - 172

SP - 96

EP - 106

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

ER -

ID: 2559103