This paper presents a study of the fuel cell system performance operating at low pressure. A polymer electrolyte fuel cell (PEMFC) is analyzed in according with the possibility of using in transport applications. So, it begins with the description of a parametric model of the fuel cell which has been developed using a combination between empirical ...

By Radu Adrian Tirnovan, Constantin Pica, Maria Cristea, Cosmin Dărab

The main goal of this paper was to obtain all acceptable locations for siting of wind turbines in the region of Central South Serbia. One of the possibilities to increase the rentability of the wind farm is to reduce the transport loses, using produced energy as close to the production site as possible. The estimations were obtained using the WAsP ...

By Predrag Miodrag Živković, Mladen Tomić, Dragana Dimitrijević Jovanović, Jelena Janevski, Mirko Dobrnjac

Science is developing rapidly and it is so fast that society can’t follow. The negative consequences of such a rapid development start to appear. First, developed countries can easily apply scientific achievements to improve the lives of their citizens, while developing countries live harder than 20 or 30 years ago. Second, pseudo-science app...

By Goran Kalinić

When preparing raw materials for the manufacture of ceramic products (clay), a significant amount of metallic impurities falls into it. With further technological operations, such raw materials are a source of danger for equipment that can fail if metal inclusions get into it, or the process line. In this regard, an urgent task is the development o...

By Leonid Zamikhovskiy, Ivan Levitsky

The development of modern process control systems for mechanized oil production using sucker-rod pumping units (SRPU), in particular during periodic well operation, requires information not only on the parameters of the reservoir, well and operation mode, but also the technical condition of surface and underground equipment. On the basis of the ana...

By Leonid Zamikhovskiy, Andrii Romanyuk

The paper approach some aspects of die design in various shape extrusion is quite complex and it is influenced by a variety of factors, which lead to increased mold performance in the extrusion process of high strength aluminum alloys. The analysis and the Solidworks computer program were used to analyze the extrusion of the shape from high strengt...

By Vasile Hotea, Jozsef Juhasz

During research of emergence and evolution of clusters in the particular case of Romania, it was noted the importance of a innovation systems of processes structure that is superposed from the very beginning on the structure of clusters, comprising also universities and research and design institutes. Considerations are made regarding the overlappi...

By Dinu Stoicovici, Mihai Bănică, Miorita Ungureanu

Jerk, as the derivative of acceleration, is used more and more in the kinematic study of the systems characterised by short travels and requiring a high precision of positioning, including elevators, CNC machine tools, and industrial robots. The acceleration modeling using jerk variation serve as a basis for generating the functioning tahogrames of...

By Ioana Craciun, Miorita Ungureanu

The Artificial Intelligence will be to the human brain what the backhoe was by hand. The great intellectual professions will all be impacted, which will free the human brain for more imagination. All the leaders of higher education establishments - engineering or business school, are facing two great challenges of artificial intelligence (AI). It i...

By Marius Calin Benea

The mining industry in Maramureș area was an important factor of economic and social progress in this zone. The gradual reduction of th mine activity, until its actual shutdown, has caused disturbances in the economic and social field. This type of industry was, and it continue to be, even in inactivity periods, a pollutant factor. Protecting the e...

By Octavia Domide, Gherasim Solovestru Domide