Experimental study of hygroscopy of single and different mixtures of MgCl 2 , KCl, NaCl, ZnCl 2 for application as heat transfer fluids in CSP

Xiaoxin Wang, Qichao Hu, Gil Pyo Kim, Xiankun Xu, Peiwen Li, Dominic F Gervasio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Eutectic molten chloride salts by MgCl 2 , ZnCl 2 , KCl, and NaCl are considered as promising high temperature heat transfer and thermal storage fluid in concentrated solar power (CSP) systems. However, chloride salts MgCl 2 and ZnCl 2 are water affinity, so they can absorb water from surroundings easily. This will increase the corrosion of metals when the molten salts stay with metals at high temperatures. Our study also found that the presence of trace water in the solid salt caused vapor pressure of the molten salts increase. The current work presents studies about the kinetic processes of water absorption and removal from single and different mixture of NaCl, KCl, MgCl 2 and ZnCl 2 salts. The process of water uptake from ambient air and removal through heating are measured quantitatively. Water removal from molten salts through sparging with argon gas was employed as a further treatment method.

Original languageEnglish (US)
Title of host publicationEnergy
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791852088
DOIs
StatePublished - Jan 1 2018
EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
Duration: Nov 9 2018Nov 15 2018

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume6B-2018

Conference

ConferenceASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
CountryUnited States
CityPittsburgh
Period11/9/1811/15/18

Keywords

  • Molten salt
  • Sparging method
  • Water removal
  • Water uptake

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Experimental study of hygroscopy of single and different mixtures of MgCl <sub>2</sub> , KCl, NaCl, ZnCl <sub>2</sub> for application as heat transfer fluids in CSP'. Together they form a unique fingerprint.

  • Cite this

    Wang, X., Hu, Q., Kim, G. P., Xu, X., Li, P., & Gervasio, D. F. (2018). Experimental study of hygroscopy of single and different mixtures of MgCl 2 , KCl, NaCl, ZnCl 2 for application as heat transfer fluids in CSP In Energy (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 6B-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2018-86416