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 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

Companies are market participants and as such have a justified interest in achieving business reputation or image through their attributes. It is very important that the individuality of companies is differentiated on the market for future business partners as users of their services or in the purchase of products. Therefore, the attributes are of ...

By Brana Komljenovic

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

As a request of a partner and subject of a research contract, this paper intend to present different stages of studies regarding the behavior of some Aluminum structures under different types of loads. Starting from existing examples, a company from aerospace industry intended to produce similar products but at a larger scale. On a virtual product ...

By Horia Ciobanu

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

The paper presents the results of theoretical research on the resource potential of solar energy calculated by different methods for administrative areas of the Carpathian region; The advanced methodology of the estimation of the influence of solar power plants on the natural environment is proposed, which concerns the determination of the signific...

By Oleg Mandryk, Nataliya Moskalchuk, Liudmyla Arkhypova, Mykola Prykhodko, Olena Pobigun