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Binary eutectic mixtures of stearic acid-n-butyramide/n-octanamide as phase change materials for low temperature solar heat storage
Ma, Guixiang1,2; Liu, Shang1,2; Xie, Shaolei1; Jing, Yan1; Zhang, Quanyou1; Sun, Jinhe1; Jia, Yongzhong1
2017-01-25
Source PublicationAPPLIED THERMAL ENGINEERING
Volume111Pages:1052-1059
SubtypeArticle
AbstractWe investigated the thermal properties and thermal reliability of stearic acid-n-butyramide and stearic acid-n-octanamide binary eutectic mixtures, as phase change materials for low temperature solar heat energy storage. The solid-liquid phase diagrams of two binary systems were established, and the eutectic compositions of binary mixtures and corresponding thermal properties were verified: (1) stearic acid-n-butyramide, the eutectic composition is 0.551 +/- 0.005 mol fraction stearic acid and (2) stearic acid-n-octanamide, the eutectic composition is 0.589 +/- 0.005 mol fraction stearic acid. The eutectic compositions have high latent heat of fusion Delta H-m = 198.38 +/- 10.22 J-g(-1), Delta H-m = 198.98 +/- 8.56 J.g(-1) and melting temperature T-peak = 337.41 +/- 1.93 K, T-peak = 336.28 +/- 2.00 K for stearic acid-n-butyramide and stearic acid-n-octanamide binary mixture, respectively. A modeling approach on the bases of thermodynamics is employed to predict solid-liquid equilibria of the studied mixtures and their latent heats of fusion. The simulated results are in good agreement with experimental results. The heat capacity of the solid phase measured are 1.69 +/- 0.2 J.g(-1). K-1, 1.61 +/- 0.2 J.g(-1).K-1 and the thermal conductivity of the solid phase are 0.222 +/- 0.03 W.m(-1) K-1, 0.276 +/- 0.034 W.m(-1) K-1 at 298.15 K for stearic acid-n-butyramide and stearic acid-n-octanamide binary mixture, respectively. The mixture has a good thermal stability after 100 melt-freeze cycles. As novel phase change materials for solar heat applications, the studied eutectic mixtures have attractive thermal performance and great utility. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordPhase Change Materials N-butyramide N-octanamide Binary Mixtures Thermal Properties Solid - Liquid Phase Behavior
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS KeywordTHERMAL-ENERGY STORAGE ; FATTY-ACIDS ; CONDUCTIVITY ENHANCEMENT ; BUILDING APPLICATIONS ; LAURIC ACID ; EQUILIBRIUM ; RELIABILITY ; SYSTEM ; OCTADECANE ; ACETAMIDE
Indexed BySCI
Language英语
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS IDWOS:000391897200099
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6186
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Ma, Guixiang,Liu, Shang,Xie, Shaolei,et al. Binary eutectic mixtures of stearic acid-n-butyramide/n-octanamide as phase change materials for low temperature solar heat storage[J]. APPLIED THERMAL ENGINEERING,2017,111:1052-1059.
APA Ma, Guixiang.,Liu, Shang.,Xie, Shaolei.,Jing, Yan.,Zhang, Quanyou.,...&Jia, Yongzhong.(2017).Binary eutectic mixtures of stearic acid-n-butyramide/n-octanamide as phase change materials for low temperature solar heat storage.APPLIED THERMAL ENGINEERING,111,1052-1059.
MLA Ma, Guixiang,et al."Binary eutectic mixtures of stearic acid-n-butyramide/n-octanamide as phase change materials for low temperature solar heat storage".APPLIED THERMAL ENGINEERING 111(2017):1052-1059.
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