245 articole găsite pentru „energy po le”.
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REDUCEREA IMPACTULUI ASUPRA MEDIULUI IN PROCEDEUL DE ACOPERIRE PRIN ZINCARE TERMICA. RECICLAREA DESEURILOR OBTINUTE
Ing. Daniel Gheorghe LAKATOS, Ing. Ioan Aurel CHERECHES, Ing. Ioan VIDICAN, Prof. dr. ing. Mircea BEJAN
Cunoasterea si modernizarea tehnologiilor de zincare termica, impreuna cu reducerea costurilor si imbunatatirea calitatii produselor zincate termic este un factor important care poate influenta activitatile de zincare termica intr-un atelier. Tehnologiile v…
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APPLICATION OF TOPSIS IN DISTRIBUTION SYSTEM MULTI-OBJECTIVE OPTIMIZATION
Andrea MAZZA, Gianfranco CHICCO - Italia
Aceasta lucrare prezinta o aplicatie al algoritmului de decizie TOPSIS pentru a obtine solutii nedominate prin optimizarea multiobiectiv a unui sistem de distributie de medie tensiune rezolvat prin metoda NSGA-II. Obiectivele considerate se bazeaza pe econo…
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EXPERIMENTAL STUDIES ON CHARACTERISTICS OF THE PHOTOVOLTAIC SYSTEMS MADE IN DIFFERENT TECHNOLOGIES
Mariana R. MILICI, L. Dan MILICI, Philip KEERSEBILCK, Win FLORE (Belgia), Dorel CERNOMAZU
Incalzirea globala a planetei noastre ca urmare a utilizarii de combustibili fosili este un subiect de actualitate. O alternativa pentru centralele poluante ce produc energie electrica o reprezinta panourile fotovoltice. Panourile solare transforma lumina so…
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O abordare moderna pentru producerea eficienta a biodieselului
Nicolae Sdrula, Ioan Frasineanu
Uniunea Europeana este puternic dependenta in prezent de combustibilii fosili pentru nevoile crescinde de transport. Biocombustibilii pot oferi o alternativa importanta la cei fosili pe termen scurt si mediu. Dintre acestia, biodieselul este un combustibil ce…
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On the limits of the Betz’s efficiency coefficient of wind turbines with the horizontally shaft
Prof.dr. ing. Petre Terzi
Pornindu-se de la modelarea curgerii prin elementele rotorului de turbina eoliana cu arbore orizontal, prin aplicarea conceptului de curgere turbulrbulenta neintubata, pe baza publicatiilor lui Betz si Sabinin, se prezinta un nou concept teoretic privind limi…
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UPON ANALITICAL AND NUMERICAL CALCULUS OF THE MAIN PARAMETERS OF THE DETONATION PROCESS
Vasile NĂSTĂSESCU1,Ghiţă BÂRSAN
This paper presents some results of scientific research undertaken by the authors, regarding the numerical modeling of the detonation process, both the Finite Element Method (FEM) and the method of free particles, in version of Smoothed Particle Hydrodynamics…
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A SOCIO-ECONOMIC REGULARITY ESTABLISHED BASED ON AN ANALOGY WITH THERMODYNAMIC PROCESSES WITH FINITE SPEED - An Equation for Standard of Living -
Ioan GANEA, Adrian S. PETRESCU, Liliana TIMOFAN , Stoian PETRESCU, Monica COSTEA
This paper proposes a quantitative description of the flows of energy, mass and information in a country, based on recently developed concepts in Thermodynamics with Finite Speed. An equation for Standard of Living is derived. As shown in the ‘70 by Georgescu…
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DISCOVERY OF “QUANTUM NUMBERS” IN THE CARDIOPULMONARY INTERACTION STUDIED IN THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Valeria PETRESCU , Monica COSTEA, Liliana TIMOFAN, Silvia DANES, Georgeta BOTEZ
The paper proposes an extension of Thermodynamics with Finite Speed (TFS) to Biological Systems, with Cardio-Pulmonary System study as the first objective. It is an extremely important system in the functioning of any blood beings (including humans). For stat…
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MEANS FOR QUALITATIVE AND QUANTITATIVE DESCRIPTION OF THE CARDIO-PULMONARY SYSTEM OPERATION WITHIN IRREVERSIBLE THERMODYNAMICS WITH FINITE SPEED
Stoian PETRESCU, Monica COSTEA, Liliana TIMOFAN, Valeria PETRESCU
Illness and aging are irreversible processes, which inevitably affects us all. The answers to the questions how, why, and how much irreversible are the cardio-respiratory system processes, will allow improved design of artificial hearts and lungs (vital “spar…
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GOLD MINING: ECONOMIC DEVELOPMENT VERSUS SUSTAINABLE DEVELOPMENT
Victor ARAD, Susana ARAD, Vlad COSMA
Against the prolonged economic crisis, the mining resources have regained the investors' attention. Demand for gold continues to increase worldwide and the high price of gold ounce compared with historical values, indicating a favorable global context of the …
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CURRENT RESEARCH DIRECTIONS IN BUILDING PHYSICS IMPROVING PERFORMANCE LEVELS FOR NEW OR RENOVATED BUILDINGS
Adrian RADU, Maricica VASILACHE, Marian PRUTEANU
In the present climatic, social and political conditions, the EU energy independence is emerging as a priority. Therefore, it set new levels of thermal protection minimum required and adapting buildings architecturally to achieve a maximum of energy efficienc…
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INTERNAL RESONANT TRANSFORMER WITH DISTRIBUTED OPEN MAGNETIC CORE
Andrei MARINESCU, Aurelia SCORNEA, Ionel DUMBRAVA
The on-site dielectric tests on cables and high power electric machines requires the achievement of some medium voltage testing facilities with reduced dimensions and weights, allowing the compensation of the important reactive energy required by the own capa…
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MAGNETIC CHARACTERISTICS OF NON-ORIENTED SILICON IRON STRIPS OBTAINED THROUGH MECHANICAL, LASER, ELECTRICAL DISCHARGE AND WATER JET CUTTING TECHNOLOGIES
Horia GAVRILĂ, Veronica MĂNESCU (PĂLTÂNEA), Gheorghe PĂLTÂNEA, Gheorghe SCUTARU, Ioan PETER
The increase of the asynchronous motors efficiency may be usually made by decreasing the total energy losses in the magnetic circuits. Non-oriented silicon iron (NO Fe-Si) sheets are soft magnetic materials with a nearly isotropic grain texture. They are used…
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NEARLY ZERO ENERGY BUILDING CONCEPT, ENERGY DESIGN PARADIGM FOR NEW BUILDINGS AND FOR RENOVATING EXISTING BUILDINGS
Dan CONSTANTINESCU, Gabriela CARACAŞ
The paper focuses on the new concept of Nearly Zero Energy Building – NZEB, which should lead, in time, to reducing the fossil energy consumption and to the protection of the natural and built environment. The NZEB concept, as defined by the European Directiv…
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A SOLUTION FOR CARBON DIOXIDE STORAGE AND COAL BED METHANE BENEFICIATION IN JIU VALLEY COALFIELD
Dorel ZUGRAVESCU, Nicolae ILIAS, Iosif ANDRAS, Sorin Mihai RADU, Iosif GRUNEANTU, George TESELEANU (Italia), Inga ROSIORU, Chiril GEORGE, Tiberiu IACOB-RIDZI, Cristian TOMESCU
The paper deals with a proposal of an integrated project for CO2 storage coming from the coal burning power plants and a joint CH4 (so called CBM) recovery and its valorization in energetic applications which will lead to a substantial reduction of the delive…
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CONSIDERATIONS ON ROMANIA’S SUSTAINABLE ENERGY DEVELOPMENT
Aureliu LECA
This analysis looks into the sustainability of the Romanian energy sector against the main trends in the world economy and within the framework of the energy and environment policies of the European Union (EU). The gloom and doom conclusion, that sustainable …
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NEW APPROACHES ON THE ENERGY STORAGE TECHNOLGIES IN ROMANIA
Ioan ȘTEFĂNESCU, Mihai VARLAM, Elena CARCADEA
Critical issues related to the availability of energy sources and their efficient use has quickly become vitally important. Population growth combined with growing demand for energy and materials in order to increase the standard of living is actually the mai…
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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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SUSTAINABLE DEVELOPMENT THROUGH PHOTOVOLTAIC ENERGY
Mihai CRENGANIS, Octavian BOLOGA
Our paper presents general aspects regarding renewable energy and its technologies. We are summarizing the characteristics of the photovoltaic energy. Also the paper describes the main components of a 24 MW photovoltaic project around Sibiu city. The goal of …
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INTERNATIONAL VISIONS ON THE USE OF NATURAL RESOURCES IN TERMS OF SUFFICIENCY, IN ROMANIA
Nicolae Tiberiu ILIAŞ, Ioan GÂF-DEAC, Ioan I. GÂF-DEAC, Iosif ANDRAS
The paper the use of natural resources in terms of sufficiency is examined, by making operational elements of management and energy diplomacy, published in the early part of the twenty-first century all over the world. In this context, a number of key element…