In this paper, investigations on the earthing systems with computational method, Finite Element Method (FEM) and experimental work are presented. The earthing systems in this study are of simple built which consist of three earthing systems configurations, 2, 3 and 4 rod electrodes for easy analysis and comparisons. The performance of earthing systems using both simulation andexperimental techniques are investigated at power frequency and under transients. It was found that from both FEM and experimental work, the performance of earthing systems under transients is found to be ćnon-linearć which its non-linearity cannot be neglected. By including the non-linear effect of soil under high currents, more accurate modelling of protective devices and their performance are hoped to be achieved in future.
COBISS.SI-ID: 16607766
Magnetic particles with a controlled Curie temperature were prepared by reducing a Ni,Cu-hydrazine complex that was synthesized in a compartmentalizedstate of reverse micelles. The planned Curie temperature of 43 °C was achieved by a thermally activated homogenization of as-prepared alloy particles embedded in a NaCl salt environment. The particles were superparamagnetic with a blocking temperature of 16.5 K and a room-temperaturemagnetization of 2.5 emu/g. The particles exhibited a therapeutic Curie temperature that is suitable for self-regulating magnetic hyperthermia.
COBISS.SI-ID: 16893718
This paper presents recent advances by an international team which is developing the thermochemical copper-chlorine (Cu-Cl) cycle for hydrogen production. Development of the Cu-Cl cycle has been pursued by several countries within the framework of the Generation IV International Forum (GIF) for hydrogen production with the next generation of nuclear reactors. Due to its lower temperature requirements in comparison with other thermochemical cycles, the Cu-Cl cycle is particularly well matched with Canada's Generation IV reactor, SCWR (Super-Critical Water Reactor), as well as other heat sources such as solar energy or industrial waste heat. In this paper, recent developments of the Cu-Cl cycle are presented, specifically involving unit operation experiments, corrosion resistant materials and system integration.
COBISS.SI-ID: 1024112220
This paper introduces a measurement device for identifying a crack's dimensions using eddy current measurement. Measurements of magnetic flux density are conducted for the purpose of finding a crack within a conductive plate. This is done on the basis of nondestructive testing using eddy currents. The absolute value of the magnetic flux density z-component is measured along an axle at the bottom of an excitation coil supplied with an alternating current. The measured B z is exemplified by a surface, whose shapedepends on the crack's position and parameters. The received measured values then serve as the basis for the crack's identification and for determining its parameters.
COBISS.SI-ID: 16640534
This paper firstly presents a measurement system for determining the magnetic properties of magnetic fluids, based on three pickup coils. The accuracy of the system was tested on known samples and then used for the characterization of magnetic losses (heating power P) on the magnetic fluid sample using two different methods. The first method is based on determining the hysteresis loop area and the second on determining the complex susceptibility; and showedthat both methods are equivalent. The aim of this paper was to identify the heating power of the liquid at a known value for the magnetic field, and the arbitrary temperature. Thus, we explored the actual reduction in the heating power due to the heating of the sample, which cannot be achieved without the temperature regulated heat bath using established calorimetric methods.
COBISS.SI-ID: 16577302