In this paper, we aim to determine the parameters of a photovoltaic installation that will ensure the electricity needs of a home equipped with smart equipment. We proposed to study the most efficient installation according to different types of panels and tilt angles. The main objective is to determine the optimal photovoltaic installation regardless of the seasonal variation, and as a secondary objective, the surplus energy should be charged to the network.

Materials like alumina and silicon carbide, sensitive to high frequency electromagnetic field are very useful for processing other materials in the high frequency electromagnetic field. The use of these sensitive materials can enhance a more uniform temperature alignment over a hot material in a high frequency electromagnetic field. These silicon carbide composites will be loaded with enriched cement. In this article, we will also discuss the factors that influence the heating rate of composed materials. These factors depend on the size of the silicon carbide particles, the percentage of silicon carbide in the volume of the composite material, the treatment atmosphere and the maximum experimental temperature. The heating rate of the composite materials was determined as the amount of silicon carbide increased while the heating rate increased. The size of the silicon carbide particles also influenced the heating rate of the composite material, which has been demonstrated experimentally. Mathematical model has shown that the effect of particle size is a geometric one dependent on a non-perfect thermal contact between the silicon carbide particle and the cement patern. The size of the silicon carbide particles also affected the filtration threshold of the composite materials. The heating rate of the composite materials grew when the calcium carbonate in the cement was pyrolyzed to form calcium oxide due to an growth in thermal conductivity.

The main objective of this work is to highlight the possibilities of substitution of all or a part of the current extraction technology with the microwave extraction technology, and to highlight the differences between the two type of the extraction solvents used. The work also presents the importance of the solvent used in the extraction process of volatile oils from parsley leaves, in terms of its quality and the microwave energy applied to the sample.

The study will result in a range of benefits at both financial and economic to the community concerned, using electricity from renewable sources, photovoltaic panels being directly connected to the grid via transformers so without energy storage, but also by alteration in angle inclination of the panels for hot and cold season. The main objective is to cover part of the electricity for community energy obtained through panels polycrystalline photovoltaic and as a secondary objective of this photovoltaic power plant is to reduce environmental impact by replacing electricity produced in power plants with electricity from renewable energy sources, and use this energy in daily activities.

This paper describes some aspects concerning the analysis of the electromagnetic and the thermal field in a microwave field using Comsol Multiphysics. A dielectric piece of oak wood heated/dried in a multimode-type applicator, at the frequency of 2450 MHz is used as model for numerical application.

The objective of this study is to analyze the heating/drying characteristics of oak planks in a microwave field. In order to be able to control the maximum temperature values during the experimentaldeterminations and to assess the time necessary for the heating/drying of oak planks, numerical modeling has been performed, using the commercial software Comsol Multiphysics. The experimental results were obtained at a frequency of 2.45 GHz in a multimode microwaveapplicator.

In this paper is presented a study on the melon fruit in which has been followed the process of drying in the microwave field. In order to finally obtain a high quality product the experimental data obtained from the research performed using a microwave, were combined withnumerical modeling, using a commercial software Ansoft HFSS

The paper presents a bond-graph method for solving and analyzing an electric circuit with four or more circuit loops. Using this method, the time for circuit analysis is much shorter then using a classicalmethod. Besides determining the intensities of electrical currents through the sides of the circuit, the bond-graphs provide the possibility to obtain the transmittance of the analyzed system applying a fast working method. The main advantage of bond-graphs is the interaction with various areas of physics. The analyzedelectrical circuit could be a part of a complex physical system that could be modeled and analyzed as a unitary system by using bond-graphs.

This paper presents a study on the behavior of wood materials which contain different amounts of water in the presence of microwaves.

In this paper the asynchronous motorwith cage, used for electrical traction is studied andanalyzed. For this motor we realized the associatedbond-graph, we pointed out the equations thatdescribe this motor, and we analyzed the electricaland mechanical features of this motor, by using thesimulation program 20 SIM, in order to improve theperformances of this motor even from the early stageof design.

Induction machine with short circuited rotoris the simplest, robust and lowest cost electricalmachine.Existing experience regarding interconnectedwith the general electro energetic system micro hydroplants, already established the use in such cases ofsimple and economic hydro mechanical, electricitygenerating, control and automation equipment wascreated by that kind of machine. This paper illustratespossibilities of the hydro energy potential utilization forhydro power plants construction on the Bihor countyrivers , experiences on how to build and operate asmall hydropower , induction generators use andsustainable solutions for small hydropower by inBihor county, Romania.

Obtaining a model is a key step for thedecision. All Models residue behaviour in responseto flaws that I have used so far have been establishedthrough a cognitive approach: thus, the useddecision tables resulting either from a knowledgeexpert, (taking into account the signs, deduction ofsequences in simulation), or the study generatorresidue (sensitivity study, qualitative deductionsequences from a transfer). If the use of expertknowledge can be extremely useful, it is not alwaysavailable or effective, and systematic study ofproperties of a generator of waste is often based onrestrictive assumptions. The model of a (dynamic)system may certainly result from a priori knowledge(knowledge model) and of a procedure foridentifying and learning (model behaviour). Ourobjective is thus to build, through learning, adynamic model for the decision.

The objectives are quality improvement and costreduction, because these are more and more important in theindustrial applications, especially for automatic systems,because of their increased complexity. The quality concept isnot a new parameter in system design: in this way thecommand who use the statistic method it was used in USA in1930. The quality administration began in 1970 in Japan andthen in 1980 in Europe. The quality improvement and thediagnosis reside in the detection, localization andidentification of variances and/or of the faults that affect theelectrical system. The diagnosis can be generally defined asbeing the supervising of an electrical system. This allows theimprovement of quality and the reduced intervention cost indifferent phases in the life cycle of the product.

In this paper, the effect of theelectromagnetic field on living beings is studied,especially those produced by the 110 kV abovegroundelectrical lines, which crosses the Beiusuluistreet of city Oradea, country Romania, in front of agroup of houses situated upon this street.

This installation realives the water pumpingfrom a well or fountain, in a feight vesse, with acentrifugal pump trained by an continuous, alternateelectrical engine, depending on the users preferences,feed from a solar battery through a system ofstabilizers and respectively of inverter of electricaltension.

This paper deals with experimental results obtained on a laboratory scale dryer. Two porous media were dried, a packing of initially water saturated glass beads and a packing of initially unsaturated pharmaceutical granules. For the first one, the main parameter is permeability of the bed varying the beads diameter and for the second one it is the porosity of the bed varying the amount of product. These experiments were carried out at fixed incident power and pressure level. During the first period of drying, it was observed that permeability was a limiting parameter to internal mass transfers when free liquid water is expulsed, revealing high gas pressure gradients inside the product. They occur when we have a massive vaporization with ebullition. As for the porosity of the granules bed, it has no effect on mass transfers. During the second period, we have no influence of both parameters on the drying kinetics. In the last period, so in the hygroscopic field or below the irreducible saturation, the internal mass transfers are governed by the electromagnetic energy absorption.

this paper presents the contributions of the Microwave Collective from the University of Oradea, concerning the realization of a set of continuous emission magnetrons, the devices and installations that were bunt and used and the applied technologies.

The present paper proposes the optimizing of the microwave ovens for the drying process of thin materials, in order to choose a basic radiant element, easy to be reproduced and which assures a good uniformity of the radiant power. The proposed solution consists in realizing a network of serial and parallel nozzles on a single wave-guide, in order to optimize the energy transfer.