3 years ago

Performance enhancement of bromide salt by nano-particle dispersion for high-temperature heat pipes in concentrated solar power plants

Yaxuan Xiong, Zhenyu Wang, Yuting Wu, Peng Xu, Yulong Ding, Chun Chang, Chongfang Ma

Publication date: 1 March 2019

Source: Applied Energy, Volume 237

Author(s): Yaxuan Xiong, Zhenyu Wang, Yuting Wu, Peng Xu, Yulong Ding, Chun Chang, Chongfang Ma


Thermal performance of molten salts can be enhanced by nanostructured materials, which can enhance the heat transfer capacity of heat pipes and further improve the global efficiency of Concentrated Solar Power plants. In this work, a eutectic mixture of sodium bromide, potassium bromide, lithium bromide and calcium bromide acted as the base salt, into which nine SiO2 nanoparticles in three diameters were dispersed to form twenty-two nano-bromides in total. The thermodynamic properties of the base salt and nano-bromides, e.g. the thermal stability and the phase change performance were investigated experimentally and analytically. It was observed that the size and the mass concentration of the SiO2 nanoparticles exhibited significant influence on the heat of fusion and the decomposing temperature but little on the melting point. By adding 0.7 wt% of 10 nm SiO2 particles, the heat of fusion and the decomposing point of the base salt were increased by maximum 99.19% and 68.4 °C respectively. In addition, densely dendritic-like networks were observed with Scanning Electron Microscopy in the nano-bromides and considered to be responsible for the improvement of the heat of fusion and the decomposing point. The authors believed these findings would contribute to enhance the heat transfer performance of heat pipes furtherly.

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.