Open-cycle magnetohydrodynamic electrical power generation: a review and future perspectives

Kayukawa, Naoyuki

doi:10.1016/j.pecs.2003.08.003

Cited by 40 publications

(18 citation statements)

References 10 publications

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“…4-13 have been closely verified with MAG-PSPICE. The NSM (MAG-PSPICE) solutions are given as red diamonds (2). The FDM computations are therefore shown to be highly accurate as corroborated by two independent numerical simulation tools.…”

Section: Further Verification With Network Simulation Methodsmentioning

confidence: 74%

“…Unsteady magnetohydrodynamic (MHD) boundary layer flows continue to stimulate significant interest in engineering sciences and applied physics owing to new emerging applications in magnetic materials processing [1] , optimization of Hall and Faraday MHD generators [2] , heat transfer control in nuclear reactors [3] and external ionized aerodynamics of flight vehicles [4] . The combined momentum, heat, and mass transfer from a vertical systems, solidification of binary alloys and crystal growth dispersion of dissolved materials, drying and dehydration operations in food processing plants, and rocket atomized liquid fuel burning.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of radiative optically-dense transient magnetized reactive transport phenomena with cross diffusion, dissipation and wall mass flux effects

Bég

Ferdows

Bég³

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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a b s t r a c tHigh temperature electromagnetic materials fabrication systems in chemical engineering require ever more sophisticated theoretical and computational models for describing multiple, simultaneous thermophysical effects. Motivated by this application, the present paper addresses transient magnetohydrodynamic heat and mass transfer in chemically-reacting fluid flow from an impulsively-started vertical perforated sheet. Thermal radiation flux, internal heat generation (heat source), Joule magnetic heating (Ohmic dissipation), thermo-diffusive and diffuso-thermal ( i.e. cross-diffusion) effects and also viscous dissipation are incorporated in the mathematical model. To facilitate numerical solutions of the coupled, nonlinear boundary value problem, non-similar transformations are employed and the partial differential conservation equations are normalized into a dimensionless system of momentum, energy and concentration equations with associated boundary thermal conditions. An implicit finite difference method ( FDM ) is utilized to solve the unsteady equations. Verification of the FDM solutions for dimensionless velocity, temperature and concentration functions is achieved with a variational finite element method code ( MAGNETO-FEM ) and also a network simulation method code ( MAG-PSPICE ). The influence of the emerging thermo-physical parameters on transient velocity, temperature, concentration, wall shear stress, Nusselt number and Sherwood number is elaborated. The flow is accelerated with increasing thermal radiative flux, Eckert number, heat generation and Soret number whereas the flow is decelerated with greater wall suction, heat absorption, magnetic field and Prandtl number. Temperatures are also observed to be elevated with magnetic parameter, radiation heat transfer, Dufour number, heat generation (source) and Eckert number with the contrary effects computed for increasing suction parameter or Prandtl number. The species concentration is enhanced with Soret number and generative chemical reaction whereas it is depressed with greater wall suction, Schimidt number and destructive chemical reaction parameter

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Section: Further Verification With Network Simulation Methodsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Numerical investigation of radiative optically-dense transient magnetized reactive transport phenomena with cross diffusion, dissipation and wall mass flux effects

Bég

Ferdows

Bég³

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…This alkali metal can be introduced into the combustor as an alkaline salt compound added to the reactants. For example, potassium carbonate (K 2 CO 3 ) can be used for potassium [5]. Alkali metals have low ionization energies, making them much more ionizable than conventional combustion gases (namely CO 2 and H 2 O), which in turn makes them practically the only source of electrons in the hot-gas plasma.…”

Section: Introductionmentioning

confidence: 99%

Multi-Physics Mathematical Model of Weakly-Ionized Plasma Flows

Marzouk¹

2018

AJMP

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This work presents a multidisciplinary mathematical model, as a set of coupled governing equations and auxiliary relations describing the fluid-flow, thermal, and electric fields of partially-ionized plasma with low magnetic Reynolds numbers. The model is generic enough to handle three-dimensionality, Hall effect, compressibility, and variability of fluid, thermal, and electric properties of the plasma. The model can be of interest to computational modelers aiming to build a solver that quantitatively assesses direct extraction of electric energy from a plasma flow. Three different approaches are proposed to solve numerically for the electric fields with different levels of tolerance toward possible numerical instability encountered at a large Hall parameter, where the effective conductivity tensor loses diagonal dominance and becomes close to singular. A submodel for calculating the local electric properties of the plasma is presented in detail and is applied to demonstrate the effect of different factors on the electric conductivity, including the fuel's carbon/hydrogen ratio and the alkaline seed element that acts as the ionizing species. An analytical expression for the collision cross-section for argon is developed, such that this noble gas can be included as one of the gaseous species comprising the plasma.

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“…Although ionization seeds can be used to lower this temperature, it still exceeds 2000~2500 K [6,7]. In addition, there is another crucial technical problem to overcome-the slagging [8].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Gas-Liquid Two-Phase Flow in a Self-Designed Mixer for a Ga-R113 MHD System

Zheng

Fang

et al. 2017

Energies

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Abstract:Liquid metal MHD (Magneto-Hydro-Dynamic) systems can be employed to produce electricity from a wide range of heat resources. In such a system, a low-boiling organic fluid and a high-temperature liquid metal fluid mix. The former evaporates, and carries the latter to flow through an MHD channel, where the electricity is generated. The mixing process and the gas-liquid flow characteristics will have a significant effect on the power generating efficiency. In the present work, trifluorotrichloroethane (R113) was chosen as the organic fluid, and gallium (Ga) as the liquid metal, respectively. Numerical study was subsequently carried out on the gas-liquid flow and heat transfer in a self-designed spherical mixer. The effects of the main factors, including the inlet velocities and inlet temperatures of Ga and R113, were separately determined, with suggested values or ranges discussed in detail.

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Open-cycle magnetohydrodynamic electrical power generation: a review and future perspectives

Cited by 40 publications

References 10 publications

Numerical investigation of radiative optically-dense transient magnetized reactive transport phenomena with cross diffusion, dissipation and wall mass flux effects

Numerical investigation of radiative optically-dense transient magnetized reactive transport phenomena with cross diffusion, dissipation and wall mass flux effects

Multi-Physics Mathematical Model of Weakly-Ionized Plasma Flows

Numerical Study of the Gas-Liquid Two-Phase Flow in a Self-Designed Mixer for a Ga-R113 MHD System

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