Thermal properties of sonicated graphene in coconut oil as a phase change material for energy storage in building applications

Safira, L; Putra, N; Trisnadewi, T; Kusrini, E; Mahlia, TMI

Thermal properties of sonicated graphene in coconut oil as a phase change material for energy storage in building applications

Safira, L Putra, N Trisnadewi, T Kusrini, E Mahlia, TMI

Permalink

Publisher:: OXFORD UNIV PRESS
Publication Type:: Journal Article
Citation:: International Journal of Low-Carbon Technologies, 2020, 15, (4), pp. 629-636
Issue Date:: 2020-11-01

Recently Added

	Filename	Description	Size
	ctaa018.pdf	Published Version	1.24 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is new to OPUS and is not currently available.

Full metadata record

Field	Value	Language
dc.contributor.author	Safira, L
dc.contributor.author	Putra, N
dc.contributor.author	Trisnadewi, T
dc.contributor.author	Kusrini, E
dc.contributor.author	Mahlia, TMI
dc.date.accessioned	2021-03-02T22:49:15Z
dc.date.available	2021-03-02T22:49:15Z
dc.date.issued	2020-11-01
dc.identifier.citation	International Journal of Low-Carbon Technologies, 2020, 15, (4), pp. 629-636
dc.identifier.issn	1748-1317
dc.identifier.issn	1748-1325
dc.identifier.uri	http://hdl.handle.net/10453/146660
dc.description.abstract	© 2020 The Author(s). Published by Oxford University Press. This study aims to investigate the thermal properties of a phase change material (PCM) based on coconut oil for building energy storage applications. Coconut oil is classified as an organic PCM composed of fatty acids made from renewable feedstock. However, low thermal conductivity is one of the major drawbacks of organic PCMs that must be improved. Graphene could be an effective material to enhance the thermal performance of organic PCMs. In this study, coconut oil with a latent heat capacity of 114.6 J/g and a melting point of 17.38°C was used. PCMs were prepared by sonicating graphene into coconut oil, as a supporting material. The mass fractions of the prepared PCMs were 0, 0.1, 0.2, 0.3, 0.4 and 0.5. Thermal conductivity tests were performed using a KD2 thermal property analyser under different ambient temperatures of 5, 10, 15, 20 and 25°C simulated with a circulating thermostatic bath. The latent heat, melting point and freezing point were determined through differential scanning calorimetry, the thermal stability was determined using thermogravimetric analysis (TGA) and the morphology and chemical structure were examined using transmission electron microscopy and Fourier-transform infrared spectroscopy, respectively. The results of this study showed that graphene addition to coconut oil improved the thermal performance, with the highest improvement seen in a 0.3 wt% sample at 20°C. The latent heat decreased by 11% owing to molecular movements within the PCM. However, TGA revealed that the composite PCMs showed good thermal stability in ambient building temperature ranges.
dc.language	English
dc.publisher	OXFORD UNIV PRESS
dc.relation.ispartof	International Journal of Low-Carbon Technologies
dc.relation.isbasedon	10.1093/ijlct/ctaa018
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.rights	International Journal of Low-Carbon Technologies 2020, 15, 629–636© The Author(s) 2020. Published by Oxford University Press.This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercialre-use, please contact journals.permissions@oup.com
dc.title	Thermal properties of sonicated graphene in coconut oil as a phase change material for energy storage in building applications
dc.type	Journal Article
utslib.citation.volume	15
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Information, Systems and Modelling
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	recently_added	*
pubs.consider-herdc	false
dc.date.updated	2021-03-02T22:49:13Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	15
utslib.citation.issue	4

Abstract:

© 2020 The Author(s). Published by Oxford University Press. This study aims to investigate the thermal properties of a phase change material (PCM) based on coconut oil for building energy storage applications. Coconut oil is classified as an organic PCM composed of fatty acids made from renewable feedstock. However, low thermal conductivity is one of the major drawbacks of organic PCMs that must be improved. Graphene could be an effective material to enhance the thermal performance of organic PCMs. In this study, coconut oil with a latent heat capacity of 114.6 J/g and a melting point of 17.38°C was used. PCMs were prepared by sonicating graphene into coconut oil, as a supporting material. The mass fractions of the prepared PCMs were 0, 0.1, 0.2, 0.3, 0.4 and 0.5. Thermal conductivity tests were performed using a KD2 thermal property analyser under different ambient temperatures of 5, 10, 15, 20 and 25°C simulated with a circulating thermostatic bath. The latent heat, melting point and freezing point were determined through differential scanning calorimetry, the thermal stability was determined using thermogravimetric analysis (TGA) and the morphology and chemical structure were examined using transmission electron microscopy and Fourier-transform infrared spectroscopy, respectively. The results of this study showed that graphene addition to coconut oil improved the thermal performance, with the highest improvement seen in a 0.3 wt% sample at 20°C. The latent heat decreased by 11% owing to molecular movements within the PCM. However, TGA revealed that the composite PCMs showed good thermal stability in ambient building temperature ranges.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/146660