储能科学与技术 ›› 2022, Vol. 11 ›› Issue (4): 1175-1183.doi: 10.19799/j.cnki.2095-4239.2021.0600

• 国际优秀储能青年科学家专刊 • 上一篇    下一篇

含碳二元系相变储热材料储热性能分析选择

周新宇1(), 栾道成1, 胡志华1, 凌俊华1, 文科林1, 刘浪1, 阴志铭1, 米书恒1, 王正云1,2()   

  1. 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
  • 收稿日期:2021-11-12 修回日期:2021-12-01 出版日期:2022-04-05 发布日期:2022-04-11
  • 通讯作者: 王正云 E-mail:xyz2653@163.com;wzy-513@163.com
  • 作者简介:周新宇(1997—),男,硕士研究生,研究方向为相变功能材料,E-mail:xyz2653@163.com
  • 基金资助:
    四川省科技支撑项目(2020YFG0265);西华大学重点科研基金(Z203121);西华大学创新基金(YCJJ2021043)

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

Xinyu ZHOU1(), Daocheng LUAN1, Zhihua HU1, Junhua LING1, Kelin WEN1, Lang LIU1, Zhiming YIN1, Shuheng MI1, Zhengyun WANG1,2()   

  1. 1.School of Materials Science and Engineering, Xihua University, Chengdou 610039, Sichuan, China
    2.Department of Physics and TcSUH, University of Houston, Houston 77001, America
  • Received:2021-11-12 Revised:2021-12-01 Online:2022-04-05 Published:2022-04-11
  • Contact: Zhengyun WANG E-mail:xyz2653@163.com;wzy-513@163.com

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。

关键词: 相变材料, 铁碳合金, 高温相变储热, 储热性能

Abstract:

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.

Key words: phase change materials, iron-carbon alloy, high temperature phase change thermal storage, thermal storage performance

中图分类号: