In this article, a multiobjective optimization is done to minimize the cost and volume of horizontal axis high-temperature superconductors (HTS) levitation bearing. The using 3-D finite-element analysis (FEA) an equivalent magnetic permeability model for HTS bulks depending on applied field. use rather than magnetization Kim's required perform process in feasible time. computation time FEA with 43.6 h 2.2 min. described calibrated experimental results from previously developed D5 bearing...

This paper presents the conception, simulation, and experimental evaluation of magnetic bearings based on NdFeB magnets zero-field-cooled (ZFC) YBCO bulk superconductors to replace a standard electric machine. Advanced research high-temperature superconductor levitation has been carried out for construction large-scale flywheels or industry applications. However, those approaches used field-cooled superconductors, whereas approach shown in this uses ZFC superconductors. Actually, as...

This paper analyses the viability of different solutions to passively augment axial stiffness a horizontal axis radial levitation passive magnetic bearing (PMB) with topology previously studied. The zero-field cooling (ZFC) high-temperature superconductor (HTS) bulks promotes higher impulsion and forces lower electromagnetic losses than field-cooling (FC), but on other hand, guiding stability is much FC. Because reasons, FC was adopted in most superconducting maglev systems. trend this...

This paper studies the technical viability of a frictionless rotating bearing model comprising one inner rotor part with discontinuous rings permanent magnets and outer stator high temperature superconducting bulks, distributed on geometric arrangement that guarantees enhanced levitating guidance forces using zero field cooling technique. Extensive Finite Element simulations were carried out to estimate levitation depending air gap dimensions. Eccentricity axial displacement are estimated...

This article presents results from a simple experimental methodology used to determine the amount of heat transferred an yttrium barium copper oxide (YBCO) bulk liquid nitrogen (LN2) and LN2 consumption during process zero-field cooling (ZFC). The thermal power can be determined YBCO temperature variation, which is difficult measure with accuracy. In this procedure, measured rate evaporation, considering latent heat. To reduce influence room heating make mass variation depend as much...

Based on the levitating design of Zero-Field-Cooled (ZFC) Maglev previously developed, a novel horizontal ZFC superconductor magnetic bearing (SMB) is currently being developed. However, simulations have shown that its stator and rotor made YBCO bulks NdFeB permanent magnets (PM), respectively, present significant discontinuities. These produce asymmetries rotation several stable unstable position angles prevent SMB from rotating smoothly, leading to step motor like sort rotation. Those...

This paper presents the conception of an original superconducting Frictionless Zero Field Cooling bearing virtual prototype. In previous work also shown in this conference, a viability study Cooling-superconducting concept was conducted. It showed that prototype is feasible. Moreover, simulation studies track provides not only effective lateral stability but higher levitation forces than commonly used tracks. new Cooling-bearing modeled 3D. The designed having mind: i) future implementation...

This study proposes and evaluates a predictive control model for the management of power flow in hybrid microgeneration plant with additional storage capacity. The integrates photovoltaic array, wind turbine, diesel generator, lithium ion battery bank. One objective proposed is to maximise use from renewable resources looking weather predictions thus minimise fossil generator corresponding CO2 emissions. Another aim duration batteries, since extending their lifetime crucial system's economic...

This paper presents an experimentally verified finite-element multiphysics model developed to simulate the coupled electro and thermodynamic processes (electromagnetic, thermal, fluid-flow with liquid-gas phase transition) occurring between liquid nitrogen (LN <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) HTS YBCO bulks. The allows estimating: 1) thermal time constants related bulk losing/gaining its superconducting state, mainly 2)...

This document presents a study on the optimization of 3D geometry horizontal axis radial levitation bearing with zero-field cooled (ZFC) high-temperature superconductor (HTS) bulks in stator, and radially magnetized permanent magnet (PM) rings rotor. The component dimensions spacing to minimize volume or cost concerning only maximization force was previously studied. guidance guiding stability depend between PM rotor HTS stator. new aims find optimum that maximize given bulk ring while...

This paper analyzes the viability of different solutions to passively augment axial stiffness a horizontal axis radial levitation passive magnetic bearing (PMB) with previously studied topology. The zero-field cooling (ZFC) high-temperature superconductor (HTS) bulks promotes higher impulsion and forces lower electromagnetic losses than those field-cooling (FC) but, on other hand, guiding stability is much FC. Because reasons, FC was adopted in most superconducting maglev systems. trend this...

This paper presents the conception and real prototype implementation of an original superconducting frictionless zero field cooling (ZFC) bearing. In previous paper, a viability study ZFC-superconducting bearing concept was conducted. It showed that virtual feasible. Moreover, simulation studies ZFC track provides not only effective lateral stability but also higher levitation forces than commonly used (FC) tracks. this new is modeled in three-dimensional physically realized. The made...

Electromagnetic heating of high-temperature superconductors (HTSs) and non-perfect thermal insulation cryostats cause liquid nitrogen (LN <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) vaporization consumption. This paper presents results from the thermo-hydraulic analysis maximum safety service time prototype a horizontal axis radial levitation bearing with zero-field cooled (ZFC) HTS bulks. It first studies temperature sensitivity...

In this article, experimental results from the testing of four representative scale models hydro-reactor profiled channels, which create a net head to promote extraction hydroelectric power currents, are presented. The tested include narrower intermediate channel section 300 mm diameter. different profile studied an inlet compression chamber and outlet depression chamber. A is created by difference in pressure, with being higher channel’s zone than kinetic outside stream velocity. Because...