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首页> 外文期刊>International journal of green energy >Thermal energy storage and thermodynamic properties of (E)-3-m-tolylbut-2-enoic acid as a medium temperature phase change material
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Thermal energy storage and thermodynamic properties of (E)-3-m-tolylbut-2-enoic acid as a medium temperature phase change material

机译：（e）-3-m-溶解丁酸-2-烯酸的热能储存和热力学性质作为介质温度相变材料

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摘要

Phase change materials (PCMs) that can store and release heat energy over the temperature range from 363 to 393 K are crucial for solar absorption cooling, and it is worthy to seek new solid-liquid PCMs candidates that melt and crystallize in this temperature range. In this paper, (E)-3-m-tolylbut-2-enoic acid (mTBEA) was applied as a PCM candidate. Its thermal energy storage properties and thermal stability were systematically investigated. The results showed that mTBEA melted at 382.9 +/- 0.5 K and crystallized at about 364 K, with a melting enthalpy (Delta H-fus) of 138.4 +/- 6.9 J g(-1) and showed good long-term cyclic stability and thermal stability. The supercooling of mTBEA was stabilized at about 20 K, indicating that the conservation condition of melted mTBEA could be simple. In addition, the melted mTBEA could release all the absorbed thermal energy upon crystallizing. Besides, mTBEA exhibited good thermal stability for it to be applied as PCM. Hence, mTBEA is a promising PCM candidate for solar absorption cooling. Furthermore, the heat capacity of mTBEA was measured by modulated temperature differential scanning calorimetry (MTDSC) over the temperature range from 198.15 to 431.15 K, and the molar thermodynamic functions, [H-T-H-298.15](m) and [S-T-S-298.15](m), were calculated based on the fitted molar heat capacity data.
机译：可以在363至393k的温度范围内存储和释放热能的相变材料对太阳能吸收冷却至关重要，并且值得寻求熔化和结晶在该温度范围内的新型固体PCM候选物。在本文中，将（e）-3-M-甲苯丁胺-2-烯酸（MTBEA）作为PCM候选物施用。系统地研究了其热能储存性能和热稳定性。结果表明，MTBEA在382.9 +/- 0.5 k下熔化并在约364k下结晶，熔点焓（Delta H-Fus）为138.4 +/- 6.9Jg（-1），并显示出良好的长期环状稳定性和热稳定性。 MTBEA的过冷在约20 k下稳定，表明熔化的MTBEA的保守条件可能很简单。此外，熔化的MTBEA可以在结晶时释放所有吸收的热能。此外，MTBEA表现出良好的热稳定性，使其施加为PCM。因此，MTBEA是用于太阳能吸收冷却的有前途的PCM候选者。此外，通过在198.15至431.15k的温度范围内调制温度差扫描量热法（MTDSC）测量MTBEA的热量，以及摩尔热力学功能，[HTH-298.15]（M）和[STS-298.15]（M） ）基于拟合摩尔热容量数据计算。

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  • 来源
    《International journal of green energy》 |2019年第10期|468-475|共8页
  • 作者

    Zeng Ju-Lan; Zhang Yu-Xiang; Xie Ting; Shu Li; Jiang Liu-Mo; Li Kun-Yu; Wang Shao-Fen; Sun Li-Xian;

  • 作者单位

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Changsha Univ Sci & Technol Hunan Prov Key Lab Mat Protect Elect Power & Tran Changsha Hunan Peoples R China;

    Guilin Univ Elect Technol Guangxi Key Lab Informat Mat Guilin Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Phase change materials; thermal energy storage; solar absorption cooling; thermodynamic properties; (E)-3-m-tolylbut-2-enoic acid;

    机译：相变材料;热能储存;太阳能吸收冷却;热力学性质;（e）-3-M-甲苯丁基 - 2-烯酸;

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