Design optimization analysis of a large electromagnetic pump for sodium coolant transportation in PGSFR

Kwak, Jaesik; Kim, Hee Reyoung

doi:10.1016/j.anucene.2018.07.019

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…The results indicated that the geometrical variables including the outer core length and flow gap and electromagnetic variables including the number of poles, input frequency, and pole pitch are the dominant factors that affect the efficiency of the annular linear induction pump (ALIP). The results revealed that an input frequency corresponding to a few tens of Hertz maximises the ALIP efficiency as opposed to the commercially employed frequency of 60 Hz, thereby leading to an effective flow control of the geometrically fixed ALIP during its operation …”

Section: Resultsmentioning

confidence: 94%

Stability boundary analysis of magnetohydrodynamic circulator for the intermediate heat transfer system of prototype gen IV sodium fast reactor

Kwak

Kim

2019

Int J Energy Res

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Summary One of the most important parts in the development of generation IV nuclear reactors is safety. In the research on generation IV sodium‐cooled fast reactors, magnetohydrodynamic (MHD) circulators have received attention for the stable transport of coolants. In this study, the stability of an MHD circulator was evaluated using a mathematical approach to obtain the critical value of the developed pressure. The critical developed pressure equation is a function of the flow rate and dimensionless parameters, which were derived from the theoretical model of the MHD circulator with a dimensionless scaled velocity, flow rate, and pressure. The stability conditions expressed using the critical value of the developed pressure and dimensionless parameters were investigated according to the changes in the main design variables of the MHD circulator. The relationships between the dimensionless parameters, stability, and main design variables constituting the stability boundary of the MHD circulator were analysed. The stability of the MHD circulator is considered safe when the stability criterion ε is lower than 1. The geometrical variables such as the duct thickness or width of the flow gap and electrical variables such as the frequency were the main parameters affecting the flow stability in the MHD circulator.

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Section: Resultsmentioning

confidence: 94%

Stability boundary analysis of magnetohydrodynamic circulator for the intermediate heat transfer system of prototype gen IV sodium fast reactor

Kwak

Kim

2019

Int J Energy Res

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“…As mentioned in the result sections, the novel arrayed electromagnetic pump structure could create any type of velocity and pressure profile, which is necessary in various applications. In other works, velocity profiles are not controllable and are highly influenced by the fluid and pump parameters [10,18,[21][22][23]. Figure 21a shows the velocity profile in different Hartman numbers (different fluids).…”

Section: Discussionmentioning

confidence: 99%

“…Their pump was of the circular linear arrangement, which was stimulated by an alternating current source [18]. In another work, they numerically and experimentally scrutinized a DC electromagnetic pump with permanent magnets in a rectangular channel.…”

Section: Introductionmentioning

confidence: 99%

An electromagnetic arrayed pump to create arbitrary velocity profiles in fluid

et al. 2021

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The present paper is conducted to develop a new structure of an electromagnetic pump capable of controlling the magnetic field in a rectangular channel. Common electromagnetic pumps do not create uniform velocity profiles in the cross-section of the channel. In these pumps, an M-shape profile is created since the fluid velocity in the vicinity of the walls is higher than that in its center. Herein, the arbitrary velocity profiles in the electromagnetic pump are generated by introducing an arrayed structure of the coils in the electromagnetic pump and implementing 3D numerical simulation in the finite element software COMSOL. The dimensions of the rectangular channel are 5.5 × 150 mm2. Moreover, the magnetic field is provided using a core with an arrayed structure made of low-carbon iron, as well as five couples of coils. 20% NaoH solution is utilized as the fluid (conductivity: 40 S/m). The arrayed pump is fabricated and experimentally created an arbitrary velocity profile. The pressure of the pump in every single array is 12 Pa and the flow rate is equal to 3375 mm3/s. According to the results, there is a good agreement between the experimental test carried out herein and the simulated models.Article highlights This is the first time that the idea of arrayed electromagnetic pump is presented. This pump uses a special arrayed core with coils; by controlling the current of each coil and the direction of the currents, the magnetic field under the core could be adjusted. By changing the magnetic field at any position in the width of the channel, the Lorentz force alters, which leads to different velocity and pressure profiles. Using COMSOL multiphysics software, the electromagnetic pump was simulated in real size compared to the experimental model. Subsequently, the simulation model was verified and different velocity profiles were generated by activation and deactivation of different coils. The pressure and velocity curves and contours were extracted. The experimental setup was manufactured and assembled. NaOH solution was utilized as the fluid. Afterwards, different modes of coil activations were investigated and the pressure and velocity profiles of the pump were calculated.

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“…Content may change prior to final publication. minor hydraulic pressure loss calculated by the empirical coefficient, and discussed the influence of different characteristic parameters on P-Q characteristic curve and efficiency of the electromagnetic pump [10][11][12][13]. In [14,15], based on the combination of circuit and magnetic circuit, a new equivalent circuit model for predicting electromagnetic pressure is proposed, whereas the simple end effects coefficient in [1] was still adopted.…”

Section: Introductionmentioning

confidence: 99%

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

et al. 2021

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The improved equivalent circuit models considering the end effects are put forward to predict the performance of annular linear induction electromagnetic pump (ALIP) based on the one-dimensional analytical model built in this paper. First, the one-dimensional physical model of ALIP is established, and the analytical expressions of electromagnetic fields are deduced and the impact of the end effects on it is analyzed. Then, two equivalent circuit models including the model only considering the end effects and the model fully taking the end effects and the difference of synchronous velocity among the end effect traveling waves and the fundamental wave into account are developed. Meanwhile, the key impedance parameters in the equivalent circuit models are obtained and the correction coefficients of the impedance generated by the end effects are abstracted. Furtherly, the performances of a small designed ALIP are calculated by the conventional and two improved equivalent circuit models respectively, the results obtained from them are compared with measured data to validate the rationality and feasibility of the models proposed.INDEX TERMS ALIP, electromagnetic field, equivalent circuit, end effect, developed pressure 12

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Design optimization analysis of a large electromagnetic pump for sodium coolant transportation in PGSFR

Cited by 9 publications

References 9 publications

Stability boundary analysis of magnetohydrodynamic circulator for the intermediate heat transfer system of prototype gen IV sodium fast reactor

Stability boundary analysis of magnetohydrodynamic circulator for the intermediate heat transfer system of prototype gen IV sodium fast reactor

An electromagnetic arrayed pump to create arbitrary velocity profiles in fluid

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

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