Preparation and thermal property of a tetradecane-octanoic acid eutectic phase change material

doi:10.12028/j.issn.2095-4239.2018.0072

Abstract

Abstract: A new binary organic phase change material with a phase change temperature of 0~3℃ was developed. The material was mad by mixing tetradecane and octanoic acid around their eutectic point predicted by a theoretical calculation, which also gave the latent heat. A differential scanning calorimeter, a step cooling curve measurement device, and a hot disk thermal analyzer were used to measure the thermal properties of the formulations. A cyclic thermal testing box was used for understanding the cycle stability of the formulations. The results showed that the eutectic point was 1.0℃ at a molar mass ratio of tetradecane to octanoic acid of 51:49 with a latent heat of 191.8 J·g^-1, and a thermal conductivity of 0.3790 W·(m·K)^-1. The phase change material was shown to have a good cycle stability:the phase change temperature was 0.9℃ and the latent heat was 191.5 J·g^-1, after 100 cycles.

Key words: phase change material, cold storage, thermal properties, cyclic stability

CLC Number:

TK02

ZHOU Sunxi, ZHANG Xuelai, LIU Sheng. Preparation and thermal property of a tetradecane-octanoic acid eutectic phase change material[J]. Energy Storage Science and Technology, 2018, 7(4): 692-697.

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