...Amin Shamsi; Alireza Ganjovi; Amir Abbas Shayegani Akmal Purpose The purpose of this study is to numerically examine the heat transfer and transport of space charges in the solid insulating materials [low density polyethylene (LDPE), flame retardant type 4 (FR4), Polytetrafluoroethylene (PTFE...

... dynamics and heat transfer phenomena into a group of interconnected lumped elements whose formulation is based on physics principles. For combining the advantages from both CFD and network model techniques, Wu et al. (2012a , 2012b) and Weinläder et al. (2012) pre-utilized large sets...

... of conventional equivalent model. Based on the law of heat transfer in stator slot, a new layered winding model is put forward. According to winding type and property of impregnations, detailed method and equivalent principle of the new model are presented. The accuracy of this new method has been verified...

...Professor Oszkár Bíró, Professor David A. Lowther and Dr Piergiorgio Alotto; Stephan Klomberg; Ernst Farnleitner; Gebhard Kastner; Oszkár Bíró Purpose – The purpose of this paper is to carry out an analytical approximation model (heat transfer model (HTM)) for the calculation of the heat transfer...

...Stephan Klomberg; Ernst Farnleitner; Gebhard Kastner; Oszkár Bíró Purpose – The purpose of this paper is to present a new computational fluid dynamics model for large electrical machines to simulate the heat transfer at specific components to the appropriate ventilation method. The most...

... Heat transfer Power devices Network analysis (circuits) Thermal modelling The network approach has been traditionally used for thermal simulations of electric power devices (Gramsch et al., 2007 ; Loebl, 1984). It is considered as a compromise between simple engineering...

...Prof. Oszkár Bíró, Prof. David A. Lowther and Prof. Piergiorgio Alotto; Maximilian Schrittwieser; Oszkár Bíró; Ernst Farnleitner; Gebhard Kastner Purpose – The purpose of this work is to propose a numerical method based on computational fluid dynamics (CFD) for reconstructing the heat transfer...

...Oszkár Bíró; David A. Lowther; Piergiorgio Alotto; Martin Hettegger; Bernhard Streibl; Oszkár Bíró; Harald Neudorfer Purpose For an accurate simulation of the temperature distribution inside an electrical machine a method for deriving the convective heat transfer coefficient numerically would...

... Publishing Limited 2011 Computational electromagnetic Induction heating Electroheating optimization Zone controlled induction heating Edge effect control Heat transfer Optimization techniques A new technology named ZCIH – zone controlled induction heating has been recently proposed...

.... However, induction heating lines need not only an optimal design oriented to “quasi” steady‐state mode but also effective control in dynamic modes. © Emerald Group Publishing Limited 2011 Induction heating Strip Slab Dynamic mode Numerical simulation Heat transfer Electromagnetism...

..., as well as, simulation results are qualitatively compared with experimental data for heat transfer coefficient distribution α at the window surface. Findings Contribution of greater k‐energy field obtained with LES calculation leads to prediction of more intensive heat transfer in comparison to k‐ω...

... Hyperthermia Shape‐induced magnetic anisotropy Hysteresis loss Eddy current loss Magnetic penetration depth Heat transfer Steels As generally accepted, high‐frequency induction heating is a process which is used to melt, bond, or harden metals and other electrically‐conductive materials...

.... Originality/value The operational and mechanical constraints on a high‐efficiency DC induction heater for aluminum billets using superconducting coils are investigated. Electromagnetic induction Heat transfer Yielding Numerical modelling Metals Heating Equation 2 Equation 3...

... Equation 8 Equation 9 Equation 10 Equation 11 © Emerald Group Publishing Limited 2011 Induction heating Phase modulation Electromagnetic fields Frequency spectrum Temperature field Heat transfer In certain cases, technologies using...

... and components. Some times a calibration phase is necessary to adjust parameters of difficult determination, like thermal contact resistance. Electric motors Circuits Windings Temperature Thermal resistance Heat transfer © Emerald Group Publishing Limited 2010 Pnn – Total motor...

... of the cable (i.e. with variable load); and determination of the admissible density of a short‐circuit (fault) current. It was assumed that the surface of the cable gives off heat by convection and radiation: Equation 3 for t≥0, where ε – total heat transfer coefficient...

... transfer mechanism between blood vessels and living tissues (Arkin et al., 1994). The models of heat transfer in perfused tissue based on the bio‐heat equation (BHE) which are available in the literature can be mainly divided into two classes: the continuum models and the discrete vascular models...

...) s_e=equatorial area ratio R=sample radius (m) P=total Joule power (W) h_r=global radiation heat transfer coeff., (W K^{−1) h_c=global conductive heat transfer coeff., (W K−1) g_e=equatorial}...

...). Such an oscillation induces AC losses in the magnet. It is disadvantageous to avoid these AC losses by supplying the magnet with an external current generator because this involves permanent refrigeration losses due to the thermal income from current leaders. Electromagnetic induction Heat transfer Heat...

... conventional heating techniques, based exclusively on heat transfer. Experimental validation of the modelling results confirmed that by altering the synthesis conditions (load geometry, microwave power, auxiliary microwave absorbers) the thickness of the Ni‐Al‐Ti layer can be controlled. Findings...