Preparation and properties of nano composite phase change thermal storage materials

doi:10.11949/j.issn.0438-1157.20160619

Abstract

Abstract:

Phase change materials(PCMs) is the basis of the research of phase change heat storage technology. Aimed at the low thermal conductivity of common phase change material-paraffin, nano particles addition technology was used to enhance the heat transfer performance of paraffin, so the thermal conductivity and thermal diffusion coefficient of paraffin were improved. Through melting test of nano particle-paraffin and observation of settling process of nano particles, Cu nanoparticle and dispersing agent Hitenol BC-10 were selected to prepare a kind of stable nano-particle/paraffin composite phase change storage material, and its thermal physical properties were tested. The experimental results showed that addition of nano-copper particles could increase the thermal conductivity of paraffin apparently. Compared with the pure paraffin, thermal conductivity of solid nano-copper/paraffin increased by 7.9%, the liquid nano-copper/paraffin increased by 3.8%, while the solid and liquid thermal diffusion coefficient increased by 20.6% and 16% respectively.

Key words: preparation, nanomaterials, composites, nano-copper/paraffin, phase change thermal storage, heat transfer enhancement

摘要：

相变蓄热材料（phase change materials，PCMs）是相变蓄热技术研究的基础。针对普通相变蓄热材料热导率低的缺点，采用纳米技术改善石蜡的相变传热性能，从而提高其热导率及热扩散系数。通过纳米颗粒-石蜡复合材料熔化过程测试和纳米颗粒沉降过程观察，确定铜纳米颗粒和Hitenol BC-10分别作为实验用纳米颗粒和分散剂，在制备稳定的纳米铜颗粒-石蜡复合相变材料的基础上，对其热物性进行了实验研究。结果表明纳米铜颗粒的添加使得石蜡热导率增幅最大，实验测得固态纳米铜-石蜡热导率提高7.9%，液态提高3.8%，而固、液态热扩散系数则分别提高了20.6%和16%。

关键词: 制备, 纳米材料, 复合材料, 纳米铜-石蜡, 相变蓄热, 强化传热

CLC Number:

TK02

KANG Yameng, DIAO Yanhua, ZHAO Yaohua, WANG Shun. Preparation and properties of nano composite phase change thermal storage materials[J]. CIESC Journal, 2016, 67(S1): 372-378.

康亚盟, 刁彦华, 赵耀华, 汪顺. 纳米复合相变蓄热材料的制备与特性[J]. 化工学报, 2016, 67(S1): 372-378.

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