Influence of working fluid characteristics on the performance of a liquid metal magnetohydrodynamic generator

Liancheng Hu, Hiromichi Kobayashi, Yoshihiro Okuno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We compare the electrical performance and fluid phenomena of a liquid metal magnetohydrodynamic (LMMHD) power generator equipping electrodes with a finite electrical conductivity by using four different working fluids: mercury, NaK78, Galinstan and U-alloy47. Three-dimensional unsteady numerical simulations of turbulent duct flows under a non-uniform magnetic field are carried out. The profiles of the Hartmann layer and the wall-jet flows with M-shaped mean streamwise velocity are varied in accordance with the interaction parameter, which diff ers for each working fluid. A large interaction parameter decreases the wall friction loss and improves electrical efficiency. The finite electrical conductivity of electrode causes Joule loss and leads to a deterioration of efficiency. These results lead to the conclusion that a liquid metal with a high interaction parameter and a low electrical conductivity for reducing the electrical conductivity ratio of the fluid to electrodes will yield high electrical efficiency.

Original languageEnglish
Pages (from-to)973-979
Number of pages7
JournalIEEJ Transactions on Power and Energy
Volume134
Issue number12
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Electrical conductivity
  • Electrical efficiency
  • Interaction parameter
  • Liquid metal
  • Magnetohydrodynamic generator

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Influence of working fluid characteristics on the performance of a liquid metal magnetohydrodynamic generator'. Together they form a unique fingerprint.

Cite this