Preparation of nitrogen-doped graphene/palmitic acid shape stabilized composite phase change material with remarkable thermal properties for thermal energy storage

Mohammad Mehrali, Sara Tahan Latibari, Mehdi Mehrali, Teuku Meurah Indra Mahlia, Emad Sadeghinezhad, Hendrik Simon Cornelis Metselaar

Research output: Contribution to journalArticleAcademicpeer-review

64 Citations (Scopus)

Abstract

Palmitic acid (PA) is one of the main phase change materials (PCMs) for medium temperature thermal energy storage systems. In order to stabilize the shape and enhance the thermal conductivity of PA, the effects of adding nitrogen-doped graphene (NDG) as a carbon nanofiller were examined experimentally. NDG was dispersed in liquid PA at various mass fractions (1-5. wt%) using high power ultrasonication. The dropping point test shows that there was clearly no liquid leakage through the phase change process at the operating temperature range of the composite PCMs. The thermal stability and thermal properties of composite PCM were investigated with a thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC), respectively. The thermal conductivity of the PA/NDG composite was determined by the laser flash method. The thermal conductivity at 35. °C increased by more than 500% for the highest loading of NDG (5. wt%). The electrical conductivity of composite PCMs was increased significantly by using NDG. The thermal cycling test proved that the PA/NDG composites PCMs had good thermal reliability and chemical durability after 1000 cycles of melting and freezing. The thermal effusivity of the PA/NDG composite PCMs was larger than that of pure PA, which is advantageous for latent heat thermal energy storage (LHTES).

Original languageEnglish
Pages (from-to)339-349
Number of pages11
JournalApplied energy
Volume135
DOIs
Publication statusPublished - 5 Dec 2014
Externally publishedYes

Fingerprint

Palmitic acid
Phase change materials
Thermal energy
Energy storage
Graphene
Thermodynamic properties
Nitrogen
acid
nitrogen
Composite materials
thermal conductivity
Thermal conductivity
liquid
Latent heat
Leakage (fluid)
Liquids
Thermal cycling
energy storage
material
Calorimeters

Keywords

  • Graphene
  • Latent heat
  • Phase change materials
  • Thermal conductivity
  • Thermal energy storage

Cite this

Mehrali, Mohammad ; Tahan Latibari, Sara ; Mehrali, Mehdi ; Mahlia, Teuku Meurah Indra ; Sadeghinezhad, Emad ; Metselaar, Hendrik Simon Cornelis. / Preparation of nitrogen-doped graphene/palmitic acid shape stabilized composite phase change material with remarkable thermal properties for thermal energy storage. In: Applied energy. 2014 ; Vol. 135. pp. 339-349.
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abstract = "Palmitic acid (PA) is one of the main phase change materials (PCMs) for medium temperature thermal energy storage systems. In order to stabilize the shape and enhance the thermal conductivity of PA, the effects of adding nitrogen-doped graphene (NDG) as a carbon nanofiller were examined experimentally. NDG was dispersed in liquid PA at various mass fractions (1-5. wt{\%}) using high power ultrasonication. The dropping point test shows that there was clearly no liquid leakage through the phase change process at the operating temperature range of the composite PCMs. The thermal stability and thermal properties of composite PCM were investigated with a thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC), respectively. The thermal conductivity of the PA/NDG composite was determined by the laser flash method. The thermal conductivity at 35. °C increased by more than 500{\%} for the highest loading of NDG (5. wt{\%}). The electrical conductivity of composite PCMs was increased significantly by using NDG. The thermal cycling test proved that the PA/NDG composites PCMs had good thermal reliability and chemical durability after 1000 cycles of melting and freezing. The thermal effusivity of the PA/NDG composite PCMs was larger than that of pure PA, which is advantageous for latent heat thermal energy storage (LHTES).",
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Preparation of nitrogen-doped graphene/palmitic acid shape stabilized composite phase change material with remarkable thermal properties for thermal energy storage. / Mehrali, Mohammad; Tahan Latibari, Sara; Mehrali, Mehdi; Mahlia, Teuku Meurah Indra; Sadeghinezhad, Emad; Metselaar, Hendrik Simon Cornelis.

In: Applied energy, Vol. 135, 05.12.2014, p. 339-349.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Mehrali, Mohammad

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AU - Sadeghinezhad, Emad

AU - Metselaar, Hendrik Simon Cornelis

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