Macro-encapsulation of metallic phase change material using cylindrical-type ceramic containers for high-temperature thermal energy storage
Macro-encapsulation of metallic phase change material using cylindrical-type ceramic containers for high-temperature thermal energy storage
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DOI：
10.1016/j.apenergy.2016.02.106
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发表时间：
2016-05-15
期刊：
影响因子：
11.2
通讯作者：
Akiyama, Tomohiro
中科院分区：
文献类型：
--
作者：
Fukahori, Ryo;Nomura, Takahiro;Akiyama, Tomohiro
高温储热对于先进的太阳能利用和废热回收系统越来越重要。金属相变材料具有相变潜热大、导热系数高的特点，可以实现高储热密度和高换热率的储热系统，因此，采用合金作为相变材料的相变储热技术具有广阔的应用前景。PCM的封装是其成功应用的关键，然而，由于金属PCM的高腐蚀性和其在固-液相变过程中的体积膨胀，封装是非常困难的。到目前为止，还没有实现用于封装金属PCM的技术。本研究提出了使用陶瓷容器，包括一个帽和一个杯的宏观封装的金属相变材料，和密封方法的容器，以承受热应力的体积膨胀过程中的相变。所得PCM胶囊具有优异的耐腐蚀性和循环性能。(C)2016爱思唯尔有限公司版权所有
High-temperature heat storage is of growing importance for advanced solar energy utilization and waste heat recovery systems. Latent heat storage technology using alloys as phase change materials (PCM) is a promising option since it can achieve a thermal energy storage system with high heat storage density and high heat exchange rate because of the large latent heat and high thermal conductivity of metallic PCMs. Encapsulation of PCM is essential for its successful use, however, the encapsulation is very difficult owing to the high corrosivity of the metallic PCM and its volume expansion during the solid-liquid phase change. So far, the technology for encapsulating metallic PCMs has not been achieved. This study proposes the use of ceramic containers comprising a cap and a cup for macro-encapsulation of metallic PCMs, and a sealing method of the containers to endure the thermal stress from volume expansion during the phase change. The resulting PCM capsule has excellent corrosive resistance and cycling performance. (C) 2016 Elsevier Ltd. All rights reserved.