Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (4): 1175-1183.doi: 10.19799/j.cnki.2095-4239.2021.0600

• Special issue of International Outstanding Young Scientists for Energy Storage • Previous Articles     Next Articles

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

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

CLC Number: