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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-间甲苯基丁二烯酸作为中温相变材料的热能存储和热力学性质

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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393 K的温度范围内存储和释放热能的相变材料（PCM）对于太阳能吸收冷却至关重要，因此，寻找在该温度范围内熔化和结晶的新型固液PCM候选材料是值得的。在本文中，（E）-3-间甲苯基-2-烯酸（mTBEA）被用作PCM候选物。系统地研究了其储热性能和热稳定性。结果表明，mTBEA在382.9 +/- 0.5 K处熔融并在约364 K处结晶，熔融焓（ΔH-fus）为138.4 +/- 6.9 J g（-1），并显示出良好的长期循环稳定性和热稳定性。 mTBEA的过冷稳定在大约20 K，这表明熔化的mTBEA的保存条件可能很简单。此外，熔化的mTBEA在结晶时可以释放所有吸收的热能。此外，mTBEA用作PCM具有良好的热稳定性。因此，mTBEA是用于太阳能吸收冷却的有前途的PCM候选产品。此外，通过调制温差扫描量热法（MTDSC）在198.15至431.15 K的温度范围内测量mTBEA的热容量，以及摩尔热力学函数[HTH-298.15]（m）和[STS-298.15]（m ）是根据拟合的摩尔热容数据计算的。

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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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