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Приказ резултата 11-20 од 224
Energy efficiency of residential buildings in Serbia
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2010)
In this paper, presented is the stale-of-the-art of energy Efficiency of residential buildings in Serbia. Special attention is paid to energy efficiency in already existing buildings. The average energy consumption in ...
Reconstruction of the aero-mixture channels of the pulverized coal plant of the 100 MW power plant unit
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2011)
After the last revitalization of thermal power block of 100 MW in TPP 'Kostolac A', made in the year 2004, during the operation of the plant, pulverized coal deposition often occurred in horizontal sections of the aero-mixture ...
The effect of bowl-in-piston geometry layout on fluid flow pattern
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2011)
In this paper some results concerning the evolution of 3-D fluid flow pattern through all four strokes in combustion chambers with entirely different bowl-in-piston geometry layouts ranging from 'omega' to 'simple cylinder' ...
Influence of running conditions on resonant oscillations in fresh-air ventilator blades used in thermal power plants
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2009)
High frequency cyclic load of fresh air supply to ventilator blades in thermo energetic facilities can cause the occurrence of fretting in the pressed overlap of ventilator shaft and socket. These loads can be generated ...
A coupled thermo-mechanical model of friction stir welding
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2012)
A coupled thermo-mechanical model was developed to study the temperature fields, the plunge force and the plastic deformations of Al alloy 2024-T351 under different rotating speed: 350, 400, and 450 rpm, during the friction ...
Theoretical-experimental determining of cooling time (t8/5) in hard facing of steels for forging dies
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2010)
This paper investigates the accuracy of analytical, empirical, and numerical expressions, i. e. the most favourable methods for calculating the cooling time from 800 to 500°C (t8/5). The degree of accuracy of time t8/5 is ...
Energetic analysis of hard facing and weld cladding of an air powered drop hammer damaged ram
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2010)
This paper studies problems of hard facing of damaged and initially cracked mechanical engineering heavy parts of complex geometry such as large rams of air powered drop hammers. During long-term exploitation, these parts ...
Nox and SO2 emission factors for Serbian lignite Kolubara
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2012)
Emission factors are widely accepted tool for estimation of various pollutants emissions in USA and EU. Validity of emission factors is strongly related to experimental data on which they are based. This paper is a result ...
Biomass gasification with preheated air: Energy and exergy analysis
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2012)
Due to the irreversibilities that occur during biomass gasification, gasifiers are usually the least efficient units in the systems for production of heat, electricity, or other biofuels. Internal thermal energy exchange ...
Mixtures of bioethanol and gasoline as a fuel for SI engines
(Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd, 2009)
The importance of alternative fuels, especially bioethanol and biodiesel, rises due to the limited oil sources, secure supply, prices changes, and environment pollution. Bioethanol is an alternative fuel which will be ...