Binary eutectic mixtures of stearic acid-n-butyramide_n-octanamide as phase change materials for low temperature solar heat storage

doi:10.1016/j.applthermaleng.2016.10.004

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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, Guixiang; Liu, Shang; Xie, Shaolei; Jing, Yan; Zhang, Quanyou; Sun, Jinhe; Jia, Yongzhong
刊名	APPLIED THERMAL ENGINEERING
	2017-01-25
卷号	111 页码:1052-1059
ISSN号	1359-4311
DOI	10.1016/j.applthermaleng.2016.10.004
英文摘要	We 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.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34549]
专题	青海盐湖研究所_盐湖资源综合利用工程技术中心
推荐引用方式 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.