Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material

Latent heat storage in phase change material (PCM) is one of the efficient ways of storing thermal energy. In latent heat storage, energy is stored in a small mass/volume with a narrow temperature transition between melting and solidifying. This study aims to investigate the effect of using eutectic...

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Main Author:	Rozanna Dewi
Format:	Thesis
Language:	English English
Published:	2005
Subjects:	Fatty acids Eutectics
Online Access:	http://psasir.upm.edu.my/id/eprint/547/1/549638_FK_2005_38.pdf
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id	my-upm-ir.547
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spelling	my-upm-ir.5472013-05-27T06:49:10Z Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material 2005-02 Rozanna Dewi, Latent heat storage in phase change material (PCM) is one of the efficient ways of storing thermal energy. In latent heat storage, energy is stored in a small mass/volume with a narrow temperature transition between melting and solidifying. This study aims to investigate the effect of using eutectic mixtures of fatty acids as PCM in building material such as gypsum board, palm-based and petrochemical-based polyurethane. Gypsum is widely used in construction industry due to its low cost. It is considered as a good supporting material for thermal energy storage since it has 41% air voids. The choice of polyurethane (PU) is made because of its increase uses in the construction industry. There were four type of eutectic mixture of fatty acids used in this work, which are lauric-stearic acids (75.5:24.5 w/w %), myristic-palmitic acids (58:42 w/w %), palmitic-stearic acids (64.2:35.8 w/w %) and capric – lauric acids (65:35 w/w %). Differential Scanning Calorimetry (DSC) analysis showed that binary mixture of fatty acid form eutectic mixture that have a definite melting/solidification points with a sharp peak and no additional hump. The latent heat for the mixtures is considered high compared to other PCM. DSC analysis showed that the thermal characteristics such as melting point, melting ranges, solidification point and solidification ranges of fatty acid impregnated in host material, are identical to fatty acid before impregnation. The latent heat of PCM was higher after impregnated in host material as an effort is needed to break the internal bond between PCM and host material. SEM analysis demonstrated that pore structure of host material was not influenced by the immersion process. Indeed, the hardness of host material remained as original. Fatty acids Eutectics 2005-02 Thesis http://psasir.upm.edu.my/id/eprint/547/ http://psasir.upm.edu.my/id/eprint/547/1/549638_FK_2005_38.pdf application/pdf en public masters Universiti Putra Malaysia Fatty acids Eutectics Faculty of Engineering English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Fatty acids Eutectics
spellingShingle	Fatty acids Eutectics Rozanna Dewi, Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
description	Latent heat storage in phase change material (PCM) is one of the efficient ways of storing thermal energy. In latent heat storage, energy is stored in a small mass/volume with a narrow temperature transition between melting and solidifying. This study aims to investigate the effect of using eutectic mixtures of fatty acids as PCM in building material such as gypsum board, palm-based and petrochemical-based polyurethane. Gypsum is widely used in construction industry due to its low cost. It is considered as a good supporting material for thermal energy storage since it has 41% air voids. The choice of polyurethane (PU) is made because of its increase uses in the construction industry. There were four type of eutectic mixture of fatty acids used in this work, which are lauric-stearic acids (75.5:24.5 w/w %), myristic-palmitic acids (58:42 w/w %), palmitic-stearic acids (64.2:35.8 w/w %) and capric – lauric acids (65:35 w/w %). Differential Scanning Calorimetry (DSC) analysis showed that binary mixture of fatty acid form eutectic mixture that have a definite melting/solidification points with a sharp peak and no additional hump. The latent heat for the mixtures is considered high compared to other PCM. DSC analysis showed that the thermal characteristics such as melting point, melting ranges, solidification point and solidification ranges of fatty acid impregnated in host material, are identical to fatty acid before impregnation. The latent heat of PCM was higher after impregnated in host material as an effort is needed to break the internal bond between PCM and host material. SEM analysis demonstrated that pore structure of host material was not influenced by the immersion process. Indeed, the hardness of host material remained as original.
format	Thesis
qualification_level	Master's degree
author	Rozanna Dewi,
author_facet	Rozanna Dewi,
author_sort	Rozanna Dewi,
title	Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
title_short	Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
title_full	Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
title_fullStr	Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
title_full_unstemmed	Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material
title_sort	thermal characteristics of eutectic mixtures of fatty acids as phase change material
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2005
url	http://psasir.upm.edu.my/id/eprint/547/1/549638_FK_2005_38.pdf
_version_	1747810245999067136

Thermal Characteristics of Eutectic Mixtures of Fatty Acids as Phase Change Material

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