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Development and properties of n-octadecane / kaolinite composites as form-stabilized phase change materials for energy storage

热能储存 潜热 复合数 材料科学 相变材料 高岭石 复合材料 熔化温度 十八烷 储能 化学工程 热容 相变 热力学 化学 有机化学 冶金 物理 功率(物理) 工程类
作者
Mehmet Selçuk Mert,Hatice Hande Mert,Müslüm Arıcı
出处
期刊:Journal of Cleaner Production [Elsevier BV]
卷期号:410: 137304-137304 被引量:16
标识
DOI:10.1016/j.jclepro.2023.137304
摘要

Thermal energy storage (TES) is one of the promising options applied for obtaining energy-saving possibilities. This goal can be attained by using phase change materials (PCMs) that allow storing/releasing latent heats without losses caused by temperature differences. However, in most cases these materials need to be encapsulated for various applications, especially to prevent contamination and/or loss of substance. In this work, incorporation of a kind of an organic PCM belonging to the paraffins was performed by one step impregnation method. For this purpose, n-octadecane (n-OD) having 191.7 kJ/kg latent heat of melting and 34.2 οC peak melting temperature was used. In here, Kaolinite clay (KC), which was modified with cetyltrimethylammonium bromide in order to enhance the incorporation amount of n-OD, was utilized as the support matrices and called as m-KC. The development of form-stable composite PCMs was carried out by applying different recipes with varying the amounts of n-OD impregnation. Among the obtained composite PCMs, m-KC/OD30 having m-KC/n-OD: 70/30 composition ratio, demonstrated the highest TES capacity without any leakage during the usage. Accordingly, TES capacity and latent heat of melting peak temperature of m-KC/OD30 were found as 81.8 kJ/kg and Tpm = 30.4 °C, respectively. Based on the appropriate phase transition temperatures and favorable latent heat of melting value, the obtained form-stable composite PCMs can be implemented for the regulation of ambient temperatures in the low-medium temperature application fields, thus a cleaner process can be implemented by realizing energy savings.

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