• 文献标题:   Study on the supercooling degree and nucleation behavior of water-based graphene oxide nanofluids PCM
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   LIU YD, LI X, HU PF, HU GH
  • 作者关键词:   graphene oxide, nanofluid, pcm, supercooling degree, nucleation
  • 出版物名称:   INTERNATIONAL JOURNAL OF REFRIGERATIONREVUE INTERNATIONALE DU FROID
  • ISSN:   0140-7007 EI 1879-2081
  • 通讯作者地址:  
  • 被引频次:   35
  • DOI:   10.1016/j.ijrefrig.2014.10.019
  • 出版年:   2015

▎ 摘  要

This article aimed to study the supercooling degree and nucleation behavior of nanofluids phase change material. The nanofluids were prepared by adding small fraction of graphene oxide nanosheets in deionized water without any dispersants. The supercooling degree of nanofluids with different concentrations was tested experimentally. The results show that the supercooling degree can be reduced by 69.1%, and the nucleation was started in advance, shorting the time by 90.7%. Theoretical analysis based on the heterogeneous nucleation theory indicates that ice crystal nucleus cannot grow on the thickness surface of the graphene oxide nanosheet, while it can grow on the top or bottom surface of the nanosheet only when the supercooling degree Delta T and the nanosheets size D meet the formulaD.Delta T >= 4.2x10(-8). Our study implies that graphene oxide nanofluids have the potential to be used as PCMs in cold storage applications because of their low supercooling degree and rapid nucleation behavior. (C) 2014 Elsevier Ltd and IIR. All rights reserved.