Analyses on response of a liquid metal MHD power generation system to various external inputs

Liancheng Hu, Hiromichi Kobayashi, Yoshihiro Okuno

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We numerically analyze the response of a liquid metal MHD power generation system to various external inputs of piston force (regular: constant (step), square, sinusoidal; irregular: Piersion-Moskowitz (P-M)) with three different working fluids (NaK78, U-alloy47, and mercury), where the electrical efficiency is mainly examined in the presence of the shape loss due to different cross-sectional areas between the MHD generator and piston driver parts. Although the electrical efficiency is reduced owing to the shape loss, the deterioration can be mitigated by using NaK78 with low density and high electrical conductivity and compensated by the increase in the applied magnetic flux density. For the period shorter than 1 s, the output power markedly decreases, although the electrical efficiency seems to recover toward the ideal value. The irregular force input based on the P-M wave gives no big difference compared to the regular forces when the effective value of the input is the same, which can provide the prospect of utilizing a real ocean wave.

Original languageEnglish
Pages (from-to)268-273
Number of pages6
JournalIEEJ Transactions on Electrical and Electronic Engineering
Volume10
Issue number3
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Magnetohydrodynamic power generation
Liquid metals
Pistons
Water waves
Magnetic flux
Magnetohydrodynamics
Deterioration
Fluids

Keywords

  • Electrical efficiency
  • Liquid metal
  • Magnetohydrodynamic generator
  • Shape loss

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Analyses on response of a liquid metal MHD power generation system to various external inputs. / Hu, Liancheng; Kobayashi, Hiromichi; Okuno, Yoshihiro.

In: IEEJ Transactions on Electrical and Electronic Engineering, Vol. 10, No. 3, 01.05.2015, p. 268-273.

Research output: Contribution to journalArticle

@article{a333ff860fe241d693d712f11c9149db,
title = "Analyses on response of a liquid metal MHD power generation system to various external inputs",
abstract = "We numerically analyze the response of a liquid metal MHD power generation system to various external inputs of piston force (regular: constant (step), square, sinusoidal; irregular: Piersion-Moskowitz (P-M)) with three different working fluids (NaK78, U-alloy47, and mercury), where the electrical efficiency is mainly examined in the presence of the shape loss due to different cross-sectional areas between the MHD generator and piston driver parts. Although the electrical efficiency is reduced owing to the shape loss, the deterioration can be mitigated by using NaK78 with low density and high electrical conductivity and compensated by the increase in the applied magnetic flux density. For the period shorter than 1 s, the output power markedly decreases, although the electrical efficiency seems to recover toward the ideal value. The irregular force input based on the P-M wave gives no big difference compared to the regular forces when the effective value of the input is the same, which can provide the prospect of utilizing a real ocean wave.",
keywords = "Electrical efficiency, Liquid metal, Magnetohydrodynamic generator, Shape loss",
author = "Liancheng Hu and Hiromichi Kobayashi and Yoshihiro Okuno",
year = "2015",
month = "5",
day = "1",
doi = "10.1002/tee.22083",
language = "English",
volume = "10",
pages = "268--273",
journal = "IEEJ Transactions on Electrical and Electronic Engineering",
issn = "1931-4973",
publisher = "John Wiley and Sons Inc.",
number = "3",

}

TY - JOUR

T1 - Analyses on response of a liquid metal MHD power generation system to various external inputs

AU - Hu, Liancheng

AU - Kobayashi, Hiromichi

AU - Okuno, Yoshihiro

PY - 2015/5/1

Y1 - 2015/5/1

N2 - We numerically analyze the response of a liquid metal MHD power generation system to various external inputs of piston force (regular: constant (step), square, sinusoidal; irregular: Piersion-Moskowitz (P-M)) with three different working fluids (NaK78, U-alloy47, and mercury), where the electrical efficiency is mainly examined in the presence of the shape loss due to different cross-sectional areas between the MHD generator and piston driver parts. Although the electrical efficiency is reduced owing to the shape loss, the deterioration can be mitigated by using NaK78 with low density and high electrical conductivity and compensated by the increase in the applied magnetic flux density. For the period shorter than 1 s, the output power markedly decreases, although the electrical efficiency seems to recover toward the ideal value. The irregular force input based on the P-M wave gives no big difference compared to the regular forces when the effective value of the input is the same, which can provide the prospect of utilizing a real ocean wave.

AB - We numerically analyze the response of a liquid metal MHD power generation system to various external inputs of piston force (regular: constant (step), square, sinusoidal; irregular: Piersion-Moskowitz (P-M)) with three different working fluids (NaK78, U-alloy47, and mercury), where the electrical efficiency is mainly examined in the presence of the shape loss due to different cross-sectional areas between the MHD generator and piston driver parts. Although the electrical efficiency is reduced owing to the shape loss, the deterioration can be mitigated by using NaK78 with low density and high electrical conductivity and compensated by the increase in the applied magnetic flux density. For the period shorter than 1 s, the output power markedly decreases, although the electrical efficiency seems to recover toward the ideal value. The irregular force input based on the P-M wave gives no big difference compared to the regular forces when the effective value of the input is the same, which can provide the prospect of utilizing a real ocean wave.

KW - Electrical efficiency

KW - Liquid metal

KW - Magnetohydrodynamic generator

KW - Shape loss

UR - http://www.scopus.com/inward/record.url?scp=84927696457&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84927696457&partnerID=8YFLogxK

U2 - 10.1002/tee.22083

DO - 10.1002/tee.22083

M3 - Article

AN - SCOPUS:84927696457

VL - 10

SP - 268

EP - 273

JO - IEEJ Transactions on Electrical and Electronic Engineering

JF - IEEJ Transactions on Electrical and Electronic Engineering

SN - 1931-4973

IS - 3

ER -