Thermal analysis of Mg2Si and Fe2Si5 phase change materials for Dish-MGT plants
Thermal analysis of Mg2Si and Fe2Si5 phase change materials for Dish-MGT plants
复制标题
DOI：
10.1016/j.egypro.2018.11.280
复制
发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
M. A. Bashir;Ambra Giovannelli;M. Navarro;Yulong Ding
中科院分区：
文献类型：
--
作者：
M. A. Bashir;Ambra Giovannelli;M. Navarro;Yulong Ding
对于集中式太阳能发电厂，高温下的热能储存是一个关键问题。本文研究了在碟式微型燃气涡轮机（DMGT）的太阳能接收器中集成相变材料，以缓解太阳辐射波动对DMGT性能的影响。对于这种应用，PCM的熔化温度应在900至1200 ºC之间。即使在文献中提出了一些有前途的材料，它们中的大多数的性能在工作温度范围内没有完全表征。因此，本文介绍了两种高温金属相变材料（Mg_2Si和Fe_2Si_5）的热分析实验结果。热扩散率，比热容和热导率已确定使用同步热分析（STA）和激光闪光分析（LFA）装置。样品的热膨胀行为已被确定为高达1000 ºC。此外，还研究了PCM样品与碳化硅（SiC）的相容性，温度高达1000 ºC。
For Concentrated Solar Power plants, the storage of thermal energy at high temperature is a critical issue. This paper deals with the application of a Phase Change Material integrated in the solar receiver of the Dish-Micro Gas Turbine (DMGT) for the mitigation of solar radiation fluctuation effects on DMGT performance. For this application, the PCM should have a melting temperature between 900 and 1200 ºC. Even if some promising materials are suggested in literature, the properties of most of them are not fully characterised in the working temperature range. Therefore, this paper presents the experimental results of the thermal analysis of two high-temperature metallic PCMs (Mg2Si and Fe2Si5). Thermal diffusivity, specific heat capacity and thermal conductivity have been determined using Simultaneous Thermal Analysis (STA) and Laser Flash Analysis (LFA) apparatuses. The thermal expansion behaviour of the samples has been determined up to 1000 ºC. Furthermore, the compatibility of the PCM samples with the Silicon carbide (SiC) has been also studied up to 1000 ºC.