Thermal Performance Evaluation of Fatty Acid Ester and Paraffin Based Mixed SSPCMs Using Exfoliated Graphite Nanoplatelets (xGnP)
- Authors
- Lee, Hwayoung; Jeong, Su-Gwang; Chang, Seong Jin; Kang, Yujin; Wi, Seunghwan; Kim, Sumin
- Issue Date
- Apr-2016
- Publisher
- MDPI AG
- Keywords
- mixed SSPCM; fatty acid ester PCM; paraffin PCM; thermal performance; thermal storage; xGnP; impregnation
- Citation
- APPLIED SCIENCES-BASEL, v.6, no.4
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 6
- Number
- 4
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/7649
- DOI
- 10.3390/app6040106
- ISSN
- 2076-3417
- Abstract
- Phase change materials (PCMs) have been used in various fields including the materials of buildings. In this research, mixed shape-stabilized PCMs (Mixed SSPCMs) were prepared by impregnating coconut oil and n-hexadecane into exfoliated graphite nanoplatelets (xGnP) through a vacuum impregnate method. Coconut oil is fatty acid ester PCM which is relatively economical in comparison to other PCMs, and n-hexadecane is paraffin PCM that has high latent heat capacity. Drawbacks include leakage in a liquid state and low thermal conductivity resolved by xGnP. When preparing Mixed SSPCMs, coconut oil and n-hexadecane were impregnated at different proportions, namely 70:30, 50:50, 30:70 wt %. Mixed SSPCMs were analyzed through SEM, FT-IR, DSC, TGA and TCi. As a result, we confirmed the microstructure, chemical stability, thermal properties, thermal stability and thermal conductivity of Mixed SSPCMs. Latent heat capacity of Mixed SSPCMs were 89.06, 104.30 and 124.50 J/g while those of SSPCMs containing single PCM were 82.34 and 96.40 J/g. Thermal conductivity of Mixed SSPCMs was more than 284% higher than that of pure coconut oil and n-hexadecane. Finally, we confirmed that coconut oil and n-hexadecane were impregnated into xGnP, and the Mixed SSPCMs have high thermal durability.
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