Investigation on thermo-physical properties of molten salt enhanced with nanoparticle and copper foam

Xin Xiao, Dongsheng Wen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

HITEC salt (40 wt.% NaNO 2 , 7 wt.% NaNO 3 , 53 wt.% KNO 3 ) with a melting temperature of about 142°C is a typical phase change material for solar energy storage. Both aluminum oxide (Al 2 O 3 ) nanopowder and copper foam were applied to enhance pure HITEC salt, so as to retrieve the limitation of composite PCMs with single enhancement. Nanocomposite was synthesized with two-step methods at the beginning, then copper foam were infiltrated with nano-salt at high temperature. The morphologies of the composites were extensively characterized with Scanning Electron Microscope, X-ray diffraction and Fourier Transform Infrared Spectrometer, while the thermal behaviors were analyzed with Differential Scanning Calorimeter and Thermos-gravimetric Analyser. Results showed that special nanostructures were formed in the composite, and physical bonding was found between Al 2 O 3 nanopowder and salt. Theoretical prediction showed that the thermal conductivities of the composites were significantly enhanced about ten times, and the specific heat capacities of the composites were slightly decreased, which is beneficial for heat storage. Furthermore, the presence of porous copper foam and Al 2 O 3 nanopowder made the extrapolated onset and peak phase change temperatures shift slightly.

Original languageEnglish
Title of host publication7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1445-1449
Number of pages5
ISBN (Electronic)9781538659823
DOIs
StatePublished - 6 Dec 2018
Externally publishedYes
Event7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018 - Paris, France
Duration: 14 Oct 201817 Oct 2018

Publication series

Name7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018

Conference

Conference7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018
Country/TerritoryFrance
CityParis
Period14/10/1817/10/18

Keywords

  • Aluminum oxide nanopowder
  • Copper foam
  • HITEC salt
  • Structural characteristics
  • Thermal characterization

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