250 articole găsite pentru „tag”.
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ARE THE STATIC POWER CONVERTERS
ENERGY EFFICIENT?
Ion POTÂRNICHE, Cornelia POPESCU, Mina GHEAMALINGA
The power static converters, products used intensively in industrial applications of type as energy conversion, traction, equipment and lifting equipment structure and others, are characterized through two validates abilities in the industrial practice: utili…
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AN ANALYTIC METHOD FOR TWO-PORT PASSIVE NETWORK
COMPUTING FOR ANALYSIS OF COUPLED OSCILLATORS
Mihai IORDACHE, Lucia DUMITRIU, Lucian MANDACHE, Dragos Niculae, Jean-Marie PAILLOT (Franta), David CORDEAU (Franta)
Voltage controlled oscillators are present in the most of the digital communication system. In our days, they are used to control the phase in microwave antenna arrays. Researches are made so that a particular phase shift can be obtained by choosing the fre…
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POWER SYSTEM OPERATION IN A CHANGING
ENVIRONMENT
Walter Sattinger (Elvetia)
Currently worldwide all power systems are faced with dramatically changes. After restructuring the system operation due to unbundling and deregulation and related high volatility of power flows at the level of transmission, we can observe substantial change…
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VECTORIAL PROBABILISTIC MODEL FOR THE UNBALANCE
FACTOR OF A THREE-PHASE ELECTRICAL NETWORK
Lambert Pierrat (Franta)
In a three-phase power electrical network, the voltage asymmetry can be split into two different components. The first component results from the network structure and possesses almost constant value caused by asymmetry of circuit elements (e.g., lines, tra…
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ENERGY MANAGEMENT SYSTEM OF HYBRID MICROGRID WITH ENERGY STOR
MSc. Mousa MARZBAND, MSc, Assoc. Prof. Andreas SUMPER, PhD - Spania, Prof. Mircea CHINDRIS, PhD, Assoc. Prof. Bogdan TOMOIAGA PhD
The economic scheduling of the generation units is playing a significant role in the energy management of the hybrid stand alone microgrid. Energy storage is an increasingly important part of the renewable energy sector because of the need to store power dur…
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APPILCABILITY PRINCIPLES OF THERMAL SPRAYING
Prof. Assoc. Eng. Mihaela POPESCU, Phd student Ibolyka BRAN, Dr. Eng. Radu Alexandru ROSU, Assist. Dr. Eng. Carmen OPRIS
Pulverizarea termica este un domeniu, folosit cu succes in ingineria suprafetei ,datorita versatilitatii si gamei largi de materiale de depunere utilizate (metalice, compozite,ceramice, aliaje cu memoria formei, cermeti). Se exemplifica interdisciplinaritatea…
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EFFECT OF CHLORIDE IONS SOURCE ON CORROSION OF REINFORCED NORMAL AND HIGH PERFORMANCE CONCRETE
PhD, Assist. Prof. Tareq Salih AL-ATTAR, MSc, Lect. Mustafa Sameer ABDUL-KAREEM
The aim of this paper is to investigate the influence of chloride ions source on corrosion of steel embedded in different types of concrete. The experimental part consisted of: chloride content analysis, rapid chloride permeability test (RCPT), and linear pol…
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INTRODUCTION À L’ÉTUDE DE LA CORROSION DES CANALISATIONS D’EAU POTABLE EN FONTE GRISE
Ing. Petre BRADOSCHE (Franta)
O retea de distributie a apei potabile este un sistem complex si eterogen, influentat de numerosi factori fizici, chimici si biologici. Fenomenele de coroziune si deteriorare din interiorul conductei sunt mai usor de studiat, deoarece depind de calitatea ape…
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Prezentul si viitorul energiei. Partea I
Prof. dr. ing. Mircea BEJAN, Prof. dr. ing. Tiberiu RUSU, Ing. Ioana BALAN
Numeroase scenarii energetice sunt elaborate in fiecare an de catre organisme specializate in domeniul energiei. Nivelele surselor primare de energie sunt date de rezervele subterane disponibile. Cele mai importante surse de energie primara sunt cele pe baza …
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Prezentul si viitorul energiei. Partea a II-a
Prof. dr. ing. Mircea BEJAN, Prof. dr. ing. Tiberiu RUSU, ing. Ioana Balan
Numeroase scenarii energetice sunt elaborate in fiecare an de catre organisme specializate in domeniul energiei. Nivelele surselor primare de energie sunt date de rezervele subterane disponibile. Cele mai importante surse de energie primara sunt cele pe baza …