Porosity and density measurements of sodium acetate trihydrate for thermal energy storage

Mark Dannemand*, Monica Delgado, Ana Lazaro, Conchita Peñalosa, Carsten Gundlach, Camilla Himmelstrup Trinderup, Jakob Berg Johansen, Christoph Moser, Hermann Schranszhofer, Simon Furbo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Sodium acetate trihydrate (SAT) can be used as phase change material in latent heat storage with or without utilizing supercooling. The change of density between liquid to solid state leads to formation of cavities inside the bulk SAT during solidification. Samples of SAT which had solidified from supercooled state at ambient temperature and samples which had solidified with a minimal degree supercooled were investigated. The temperature dependent densities of liquid and the two types of solid SAT were measured with a density meter and a thermomechanical analyzer. The cavities formed inside samples of solid SAT, which had solidified after a high or minimal degree of supercooling, were investigated by X-ray scanning and computer tomography. The apparent density of solid SAT depended on whether it solidified from a supercooled state or not. A sample which solidified from a supercooled liquid contained 15% cavities and had a density of 1.26 g/cm3 at 25 °C. SAT which had solidified with minimal supercooling contained 9% cavities and had a density of 1.34 g/cm3 at 25 °C. The apparent densities of the solid SAT samples were significant lower than the value of solid SAT reported in literature of 1.45 g/cm3. The density of liquid and supercooled SAT with extra water was also determined at different temperatures.
Original languageEnglish
JournalApplied Thermal Engineering
Volume131
Pages (from-to)707-714
ISSN1359-4311
DOIs
Publication statusPublished - 2018

Keywords

  • Sodium acetate trihydrate
  • Density
  • Phase change material
  • X-ray tomography
  • Thermal energy storage
  • Cavity

Cite this

Dannemand, Mark ; Delgado, Monica ; Lazaro, Ana ; Peñalosa, Conchita ; Gundlach, Carsten ; Trinderup, Camilla Himmelstrup ; Johansen, Jakob Berg ; Moser, Christoph ; Schranszhofer, Hermann ; Furbo, Simon. / Porosity and density measurements of sodium acetate trihydrate for thermal energy storage. In: Applied Thermal Engineering. 2018 ; Vol. 131. pp. 707-714.
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abstract = "Sodium acetate trihydrate (SAT) can be used as phase change material in latent heat storage with or without utilizing supercooling. The change of density between liquid to solid state leads to formation of cavities inside the bulk SAT during solidification. Samples of SAT which had solidified from supercooled state at ambient temperature and samples which had solidified with a minimal degree supercooled were investigated. The temperature dependent densities of liquid and the two types of solid SAT were measured with a density meter and a thermomechanical analyzer. The cavities formed inside samples of solid SAT, which had solidified after a high or minimal degree of supercooling, were investigated by X-ray scanning and computer tomography. The apparent density of solid SAT depended on whether it solidified from a supercooled state or not. A sample which solidified from a supercooled liquid contained 15{\%} cavities and had a density of 1.26 g/cm3 at 25 °C. SAT which had solidified with minimal supercooling contained 9{\%} cavities and had a density of 1.34 g/cm3 at 25 °C. The apparent densities of the solid SAT samples were significant lower than the value of solid SAT reported in literature of 1.45 g/cm3. The density of liquid and supercooled SAT with extra water was also determined at different temperatures.",
keywords = "Sodium acetate trihydrate, Density, Phase change material, X-ray tomography, Thermal energy storage, Cavity",
author = "Mark Dannemand and Monica Delgado and Ana Lazaro and Conchita Pe{\~n}alosa and Carsten Gundlach and Trinderup, {Camilla Himmelstrup} and Johansen, {Jakob Berg} and Christoph Moser and Hermann Schranszhofer and Simon Furbo",
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doi = "10.1016/j.applthermaleng.2017.12.052",
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Porosity and density measurements of sodium acetate trihydrate for thermal energy storage. / Dannemand, Mark; Delgado, Monica; Lazaro, Ana; Peñalosa, Conchita; Gundlach, Carsten; Trinderup, Camilla Himmelstrup; Johansen, Jakob Berg; Moser, Christoph; Schranszhofer, Hermann; Furbo, Simon.

In: Applied Thermal Engineering, Vol. 131, 2018, p. 707-714.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Porosity and density measurements of sodium acetate trihydrate for thermal energy storage

AU - Dannemand, Mark

AU - Delgado, Monica

AU - Lazaro, Ana

AU - Peñalosa, Conchita

AU - Gundlach, Carsten

AU - Trinderup, Camilla Himmelstrup

AU - Johansen, Jakob Berg

AU - Moser, Christoph

AU - Schranszhofer, Hermann

AU - Furbo, Simon

PY - 2018

Y1 - 2018

N2 - Sodium acetate trihydrate (SAT) can be used as phase change material in latent heat storage with or without utilizing supercooling. The change of density between liquid to solid state leads to formation of cavities inside the bulk SAT during solidification. Samples of SAT which had solidified from supercooled state at ambient temperature and samples which had solidified with a minimal degree supercooled were investigated. The temperature dependent densities of liquid and the two types of solid SAT were measured with a density meter and a thermomechanical analyzer. The cavities formed inside samples of solid SAT, which had solidified after a high or minimal degree of supercooling, were investigated by X-ray scanning and computer tomography. The apparent density of solid SAT depended on whether it solidified from a supercooled state or not. A sample which solidified from a supercooled liquid contained 15% cavities and had a density of 1.26 g/cm3 at 25 °C. SAT which had solidified with minimal supercooling contained 9% cavities and had a density of 1.34 g/cm3 at 25 °C. The apparent densities of the solid SAT samples were significant lower than the value of solid SAT reported in literature of 1.45 g/cm3. The density of liquid and supercooled SAT with extra water was also determined at different temperatures.

AB - Sodium acetate trihydrate (SAT) can be used as phase change material in latent heat storage with or without utilizing supercooling. The change of density between liquid to solid state leads to formation of cavities inside the bulk SAT during solidification. Samples of SAT which had solidified from supercooled state at ambient temperature and samples which had solidified with a minimal degree supercooled were investigated. The temperature dependent densities of liquid and the two types of solid SAT were measured with a density meter and a thermomechanical analyzer. The cavities formed inside samples of solid SAT, which had solidified after a high or minimal degree of supercooling, were investigated by X-ray scanning and computer tomography. The apparent density of solid SAT depended on whether it solidified from a supercooled state or not. A sample which solidified from a supercooled liquid contained 15% cavities and had a density of 1.26 g/cm3 at 25 °C. SAT which had solidified with minimal supercooling contained 9% cavities and had a density of 1.34 g/cm3 at 25 °C. The apparent densities of the solid SAT samples were significant lower than the value of solid SAT reported in literature of 1.45 g/cm3. The density of liquid and supercooled SAT with extra water was also determined at different temperatures.

KW - Sodium acetate trihydrate

KW - Density

KW - Phase change material

KW - X-ray tomography

KW - Thermal energy storage

KW - Cavity

U2 - 10.1016/j.applthermaleng.2017.12.052

DO - 10.1016/j.applthermaleng.2017.12.052

M3 - Journal article

VL - 131

SP - 707

EP - 714

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -