116 articole găsite pentru „energy system”.
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SPEED CONTROL OF DC MOTOR USING FOUR-QUADRANT CHOPPER AND BIPOLAR CONTROL STRATEGY
Lecturer Eng. Ciprian AFANASOV PhD, Assoc. Prof. Eng. Mihai RATA PhD, Assoc. Prof. Eng. Leon MANDICI PhD
Lucrarea de fata consta in studiul unui sistem de actionare electrica pentru controlul vitezei motorului de curent continuu cu excitatie separata utilizand un chopper cu comanda sincrona cu structura de tip punte H care asigura functionarea in patru cadrane…
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MANAGEMENTUL INFRASTRUCTURII CRITICE A SISTEMELOR ELECTROENERGETICE
Prof.dr.ing. Adrian BADEA, Prof.dr.ing. Ion CHIUTA, Ing. Adrian VALCIU, George PAUN
Lucrarea prezinta conceptul de infrastructura critica si criteriile de identificare a potentialelor infrastructuri critice, iar apoi sunt se particularizeaza pentru sistemul energetic, fiind analizate vulnerabilitatile/factorii de risc la adresa obiectivelor…
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VIRTUAL INSTRUMENT FOR CALCULATION OF UNBALANCE FACTORS THROUGHS FORMULAS GIVEN IN INTERNATIONAL STANDARDS AND REGULATIONS
Assoc. Prof. Eng. Gabriela RATA PhD, Assoc. Prof. Eng. Vasilis CHATZIATHANASIOU PhD (Grecia), Prof.Eng. Valentin POPA PhD, Assoc. Prof. Eng. Mihai RATA PhD
Calitatea energiei electrice este o problema complexa, de mare actualitate in sistemele electroenergetice. Cunoasterea indicatorilor de calitate ai energiei electrice, metodelor de determinare ale acestora, cunoasterea limitelorpermisein conformitate custan…
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MATHEMATICAL SOLUTIONS TO APPROXIMATE THE PV PANELS CHARACTERISTICS AND PARAMETERS
Prof. PhD. Eng. Horia ANDREI, MSc.Eng. Paul ANDREI, Lect.PhD. Eng. Traian IVANOVICI, PhD. Student Eng.Emil DIACONU, Assoc.Prof.PhD. Eng. Florin STAN
Ultima perioada a dus la cresterea semnificativa a cercetarilor si aplicatiilor industriale in domeniul energiei soalre deoarece aceasta este considerata ca fiind energia viitorului, este curata si regenerabila. Evolutia sistemelor fotovoltaice (PV) a condus …
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OPTIMAL SELECTION OF SLOTS NUMBER PER POLE AND PHASE AT ROTATIONAL ELECTRICAL GENERATORS
Eng. Madalin COSTIN PhD Student, Assoc. Prof. Eng. Ion VONCILA PhD, Prof. Eng. Grigore FETECAU PhD
Problematica generatoarelor sincrone excitate cu magneti permanenti, utilizate in conversia energiei –ca particularitati disticte de proiectare optimala - este una de actualitate. In lucrare se dezvolta o metoda noua de determinare a numarului de crestaturi …
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CREAREA UNUI MEDIU SOCIAL PRIETENOS PRIN PROMOVAREA MIJLOACELOR DE ACCESIBILIZARE DE TIP PLATFORME RIDICATOARE PENTRU CLADIRI SI MIJLOACE DE TRANSPORT
Dr. ing. CS I Corneliu CRISTESCU, Ing. CS III, Catalin DUMITRESCU, Ing. IDT III Petrica KREVEY, Ing. CS Liliana DUMITRESCU
In articol se prezinta unele rezultate remarcabile ale activitatii de cercetare-dezvoltare desfasurate de Institutul de Cercetari pentru Hidraulica si Pneumatica-INOE 2000-IHP din Bucuresti si de partenerii sai, in directia promovarii tehnologiilor avansate …
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EDUCATIA – COMPONENTA ESENTIALA A POLITICII DE MEDIU A COMISIILOR ACADEMIEI OAMENILOR DE STIINTA DIN ROMANIA
Sef lucr. drd. Alexandru Ionut CHIUTA, Prof. univ. dr. ing. Ion N. CHIUTA, Drd. ing. Liviu Mihai SIMA
In acest articol se prezinta cum sunt tratate educatia si politicile de mediu in cadrul AOSR, precum si grupurile de lucru implicate in aceste activitati. De educatie se ocupa Comisia pentru Dezvoltarea Creativitatii, iar politicile de mediu se analizeaza in…
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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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HIGH PERFORMANCE MAGNETIC DEVICES BASED ON NANOCRYSTALLINE MATERIALS
Andrei MARINESCU Horia GAVRILA, Ionel DUMBRAVA
During the last two decades remarkable advances occurred in the field of semiconductor devices and smart systems, by their miniaturization and performance increase. Consequently, the reduction of equipment energy consumption and dimensions has resulted. A maj…
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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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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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CONCEPTUAL DESIGN OF RENEWABLE-BASED ENERGY MIXES FOR SUSTAINABLE COMMUNITIES
Ion VISA, Anca DUTA, Macedon MOLDOVAN, Bogdan BURDUHOS
The transition towards a new, sustainable and affordable energy pattern is defined in the European Union document known as SET Plan (The European Strategic Energy Technology Plan). As the built environment accounts for over 40% of the total energy consumption…
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Cresterea eficientei unui sistem urban de alimentare cu energie termica prin utilizarea energiei geotermale
Sef lucr. dr. ing. Sorin Dimitriu, Prof. dr. ing. Ana-Maria Bianchi, Conf. dr. ing. Florin Baltaretu
Lucrarea trateaza o tema de mare interes si actualitate pentru Romania: procesul de reabilitare si modernizare a sistemelor urbane de alimentare cu energie termica. O solutie atractiva si promitatoare referitoare la cresterea eficientei energetice a acestor s…
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Optimization criteria for renewable energy supply systems
Liviu Herman, Dumitru Tucu
Lucrarea sintetizeaza o serie de criterii de optimizare pentru proiectarea sistemelor energetice din surse regenerabile.