Time filter

Source Type

Košice, Slovakia

Grega R.,University of Zagreb | Ilomisin J.,University of Zagreb | Puskar M.,University of Zagreb | Kul'ka J.,University of Zagreb | And 3 more authors.
Transactions of the Royal Institution of Naval Architects Part A: International Journal of Maritime Engineering

Development of diesel engines is focused on reduction of exhaust gas emissions, increase of efficiency of the fuel mixture combustion and decrease of fuel consumption. Such engines are referred to as low-emission engines. Lowengines trends bring higher engine power outputs, torques and also increase of vibrations and noisiness level. Tn order to reduce these vibrations of diesel engines, it is necessary to apply different dynamical elements, which are able to increase an adverse impact of exciting amplitudes. One of the results is application of a pneumatic dual-mass flywheel. The pneumatic dual-mass flywheel is a dynamical element that consists of two masses (the primary and the secondary mass), which are jointed together by means of a flexible interconnection. This kind of the flywheel solution enables to change resonance areas of the mechanical system which consequently leads to reduction of vibrations. © 2015: The Royals Institution of Naval Architects. Source

Weiss E.,Faculty BERG | Weiss R.,Faculty BERG | Nascakova J.,UE Bratislava | Cervenka P.,Czech Technical University | Turisova R.,University of Zagreb

The aim of the paper is to evaluate return of investment (ROI) and cost savings from proposed use of solar systems for residents funded by government grants. The paper deals with proposals for solar energy systems for various use, simple calculations of payback periods of solar systems financed with subsidy and without subsidy. Apart from climatic conditions, chemical composition the of the absorber and structural elements that are made of copper, respectively aluminum and Al-Mg alloy play an important role in assessing the payback period of the investment in solar panels. Source

Mixtaj L.,Faculty BERG | Nascakova J.,UE Bratislava | Weiss E.,Faculty BERG | Weiss R.,Faculty BERG | Zawada M.,University of Sfax

This paper focuses on the assessment of possibilities to subsidize the purchase and installation of solar collectors in Poland by government or local government grants and special funds designed for this purpose. It analysis of costs and profits resulting from the application of solar installations in the process of heat generation for household requirements, by calculating the payback time, with taking into account prices of other energy carriers and the above mentioned subsidies. Collectors at present are manufactured solely from metals (copper, aluminium, Al-Mg alloys). The use of these materials is tied to considerable energy demand and the production technology is complex. This affects the economy of running a solar device. Source

Discover hidden collaborations