Author: administrateur

17 Oct Urban electric transport in large urban areas. Present and future prospects / Transportul electric urban in marile aglomerari urbane. Prezent si perspective

Posted at 16:05h in - Classification of publications - All, - Classification of themes - All, Academic report, by a Commission or a Working Group, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2012
The work analyses the policies developed within the EU on public transport in large urban areas, the benefits from the “electrification” of transport means in terms of reducing pollution and increasing energy efficiency.
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17 Oct The use of natural agents and renewable and recoverable energy sources in refrigeration and climate conditioning facilities / Utilizarea agenţilor naturali şi a surselor de energie regenerabile şi recuperabile în instalaţiile frigorifice şi de climă

Posted at 16:04h in - Classification of themes - All, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR), Working group reports by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2012
This paper attempts to examine the issue of air conditioning which must meet the following requirements: to conserve the energy, to protect the environment and to be compact as geometry. For this purpose are presented air conditioning refrigeration systems that use renewable energy sources (solar energy), natural refrigerants for environment protection, under international norms and compact heat exchangers (plate, microchanels).
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17 Oct Prospects for renewable energies via hydrogen for a sustainable urban transport / Prospecţii privind utilizarea energiilor regenerabile via hidrogen pentru un transport urban sustenabil

Posted at 16:03h in - Classification of themes - All, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR), Working group reports by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2012
The aim of this paper is to give a snapshot of the possibility to introduce hydrogen into urban mobility in spite of the still existing technological drawbacks. A case study analyses, for a given situation, is proposed to be elaborated as an experimental application.
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17 Oct The city of alternative energy

Posted at 16:02h in - Classification of themes - All, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR), Working group reports by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2012
Our paper presents general aspects regarding renewable energy and its technologies. We are summarizing and comparing the characteristics of the five existing energy sources: photovoltaic, wind, geothermal, bioenergy and tidal energy.
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17 Oct Hydropower – essential component in the mix of renewable energies / Hidroenergia – componentă esenţiala în cadrul surselor de energie regenerabilă

Posted at 16:02h in - Classification of themes - All, Co-studies, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2013
The paper deals with the hydropower development having in mind that water is a strategic resource, requires to be nationally managed based on sustainable development principles, according to an unitary legal framework.
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17 Oct Heat island mitigation in urban environments through green surfaces integration in the building envelope / Diminuarea efectelor insulei de căldură în aglomerările urbane utilizând soluţii specifice clădirilor verzi

Posted at 16:00h in - Classification of themes - All, Co-studies, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2013
This paper supports the validity of green surface integration solutions by analyzing their effects on indoor climate, in comparison with conventional systems. The analysis is based on computer simulated models of the heat transfer phenomena under variable conditions, with respect to external climatic parameters influenced by the Heat Island effects.
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17 Oct Innovative CAE / testing solutions for wind turbines

Posted at 15:57h in - Classification of themes - All, Co-studies, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2013
The authors present the development of a consistent modeling and simulation approaches to correctly describe the realistic behavior of wind turbines. The Hybrid Engineering allows simulation and optimization of the performance of mechanical systems for structural integrity, noise and vibration, acoustics, system dynamics and durability, from the initial concept to the complete modeling and simulation of components and the full wind turbine.
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17 Oct Modeling, simulation and valdation of the hydropower units dynamics by co-simulation

Posted at 15:56h in - Classification of themes - All, Co-studies, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2013
The paper presents the authors' theoretical and experimental research in the field of numerical simulation of fluid transients from the pipelines of the high head hydropower units, used for frequency control in large power systems including wind and solar unpredictable energy sources.
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17 Oct Automatic voltage regulation in medium voltage networks combined with renewable energy sources / Controlul tensiunii în reţelele de medie tensiune în care sunt conectate surse regenerabile de energie

Posted at 15:36h in - Classification of themes - All, Co-studies, Energy and Climate Change, Romanian Academy of Technical Sciences (ASTR) by administrateur 0 Comments
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Romanian Academy of Technical Sciences (ASTR)
2013
The paper proposes a solution of UPQC (Unified Power Quality Conditioner) type to compensate the voltage variations and to provide an actually constant voltage at the terminals of the users with sensitive receivers. The experimental study performed for the developed installation emphasized good response characteristics both in normal and disturbed operating conditions.
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