Thermal properties of shape-stabilized phase change materials using fatty acid ester and exfoliated graphite nanoplatelets for saving energy in buildings

Seunghwan Wi, Jungki Seo, Su Gwang Jeong, Seong Jin Chang, Yujin Kang, Sumin Kim

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

Abstract This paper deals with the thermal performances of shape-stabilized phase change materials (SSPCMs) for energy saving in various fields. Two SSPCMs were prepared by impregnating coconut oil and palm oil, as phase change materials (PCMs), into exfoliated graphite nanoplatelets (xGnP), as a supporting material. Coconut oil and palm oil are types of organic fatty acid ester PCMs made from under-used and renewable feedstocks. However, they have a major drawback, namely their low thermal conductivity. To improve the thermal conductivity of organic fatty acid ester PCMs, xGnP can be effective. Therefore we prepared form-stable organic fatty acid ester PCMs with xGnP, using the vacuum impregnation method. In this study we used coconut oil and palm oil, which have latent heat capacities of 110.4 and 127.3 J/g and melting points of 26.78 and 17.26°C, respectively. The organic fatty acid ester PCMs were incorporated into the porous structure of xGnP. The thermal conductivity of the produced SSPCMs were over 400% higher than pure fatty-acid ester PCM. Also, the latent heat were 82.34 and 77.18 J/g, respectively. The characteristics of the organic fatty acid ester PCMs were determined by using SEM, DSC, FT-IR, TGA and TCi.

Original languageEnglish
Article number7804
Pages (from-to)168-173
Number of pages6
JournalSolar Energy Materials and Solar Cells
Volume143
DOIs
Publication statusPublished - 2015 Jul 14

Bibliographical note

Funding Information:
This research was supported by a grant ( 14CTAP-C078014-01 ) from Infrastructure and Transportation Technology Promotion Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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