含碳二元系相变储热材料储热性能分析选择  

Thermal storage performance of carbon-containing binary phase change heat storage materials

作　　者：周新宇 栾道成[1] 胡志华[1] 凌俊华 文科林 刘浪 阴志铭 米书恒 王正云[1,2] ZHOU Xinyu;LUAN Daocheng;HU Zhihua;LING Junhua;WEN Kelin;LIU Lang;YIN Zhiming;MI Shuheng;WANG Zhengyun(School of Materials Science and Engineering,Xihua University,Chengdou 610039,Sichuan,China;Department of Physics and TcSUH,University of Houston,Houston 77001,America)

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]休斯敦大学物理系及德州超导中心,美国休斯顿77001

出　　处：《储能科学与技术》2022年第4期1175-1183,共9页Energy Storage Science and Technology

基　　金：四川省科技支撑项目(2020YFG0265,20ZDZX0042);西华大学重点科研基金(Z203121);西华大学创新基金(YCJJ2021043)。

摘　　要：相变储热技术与聚光太阳能发电技术相结合可以提高太阳能的利用率,减缓化石燃料燃烧带来的环境压力。本文通过分析相变储热材料的选择标准,对筛选出具有研究价值的含碳二元系相变储热材料的性能特别是热物理性能进行分析。研究发现,硅、硼、铝、铬、铁单质材料与碳元素形成的二元化合物或固溶体具有较高的熔点,形成的含碳二元系相变储热材料在高温相变储热领域应用前景广阔。在含碳二元系相变储热材料中,Fe-C二元合金可满足高温相变储热系统1100~1500℃的相变储热要求,当合金为含碳4.3%的Fe-C共晶成分时,Fe-C二元合金的相变潜热理论值为611 kJ/kg,热导率约为(40±16)W/(m·K),相变温度为1148℃,具有相对其他合金成分更为优异的综合储热性能可用于聚光太阳能热发电系统储热。Solar energy linked to effective energy storage has the potential to reduce environmental pressure caused by fossil fuel combustion.Concentrated solar power generation combined with phase change heat storage technology offers a promising route to achieve improved energy utilization.In this study,by considering the selection criteria of phase change materials(PCMs)for heat storage,performance aspects of carbon-containing binary system PCMs,especially thermophysical properties,are analyzed.The study found that the binary compounds and solid solutions formed by silicon,boron,aluminum,chromium,iron,and carbon have high melting points.In particular,carbon-containing binary PCMs have broad prospects for application in high-temperature phase change heat storage.Among the carbon-containing binary PCMs,Fe-C binary alloy can meet the heat storage requirements of a high temperature phase change heat storage system(i.e.,1100~1500℃).When the alloy is a Fe-C eutectic composition containing 4.3%carbon,the theoretical value of the alloy's phase transformation latent heat is 611 kJ·kg^(-1),and its thermal conductivity is approximately(40±16)W·m^(-1)·K^(-1),The phase transition temperature is 1148℃,which is suitable for heat storage in a concentrated solar thermal power generation system.The Fe-C binary alloy also has better comprehensive heat storage performance than other alloy components.

关 键 词：相变材料 铁碳合金 高温相变储热 储热性能 

分 类 号：TM911[电气工程—电力电子与电力传动]