Lista radova prihvaćenih za konferenciju
Lista radova i abstrakata, prihvaћених za prezentaciju na Conference Power Plants 2010 | Konferencija Elektrane 2010
Ana Stanić - E&A Law, 42 Brook Street, London W1K 5DB, UK
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In this presentation Ana Stanic will discuss the lessons to be learned from large private investments made in the electricity sectors of Bulgaria, India, Argentina and Germany.
M. Erić, A. Erić, P. Škobalj, D. Cvetinović, P. Stefanović - Institute of Nuclear Sciences Vinča, Laboratory for Thermal Engineering and Energy P.O.Box 522, 11001 Belgrade, Serbia
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Long term plan of environmental modernization for Economic Assosiation ’’TPP Nikola Tesla’’ has been prepared in year 2002, which subsidiary is Thermal Power Plant Kolubara. Priority is given to reduction of emission of particulate matters – fly ash from the stacks as sources of pollution. Reconstruction of electrostatic precipitators of Thermal Power Plant Kolubara A5 unit have been performed from 01.04.2009. to 31.10.2009.
Suppliers of electrostatic precipitators guaranteed the outlet concentration of particulate matter in the amount of 50 mg/m3, which was also confirmed by the guarantee investigation. Reduction of the outlet concentration of particulate matter was achieved by increasing of height and number of collecting electrodes by adding one additional field of electrodes and enhancement of current and voltage characteristics of electrostatic precipitator sections.
Guarantee tests were performed by Institute of Nuclear Sciences Vinča, Laboratory for Thermal Engineering and Energy during July 2010, in accordance with standard ISO 9096 (2003).
In this paper will be present results of particulate matter emission before and after electrostatic precipitators reconstruction, which will be compared and analized in relation to particulate matter emission limit, which suppliers of electrostatic precipitators guaranteed.
K.A. Grigoryev - PhD, Chief at the Department of Reactor and Steam Generator Saint-Petersburg State Polytechnical University 29 Polytechnical street, St.-Petersburg, 195251, Russia, e-mail: kg1210@mail.ru
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POZIVNO PREDAVANJE / INVITED LECTURE
R. Jovanović, P. Stefanović, D. Cvetinović, P. Škobalj, N. Živković, M. Erić, Z. Marković - Institute of Nuclear Sciences VINČA, Laboratory for Thermal Engineering and Energy University of Belgrade, PO Box 522, 11001 Belgrade, Serbia
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Current liquid fuel consumption for startup and combustion support in the Electric Power Utility of Serbia is about 100,000 tons per year, with a tendency to increase in the future due to decline in coal quality, and coal quality fluctuations. Approximately fifty percent of the fuel is consumed during unit startup, and the rest is used for combustion support when a unit is working with lower power production or with low quality coal. The plasma system for pulverized coal ignition enchantment and flame stabilization is considered as effective substitution of current system for pulverized coal combustion support based on heavy oil. Plasma system for fire stabilization of pulverized coal combustion on thermal power plant boilers has already been implemented throughout the world (USA, Russia, Australia, and China). In order to implement advanced plasma system several requirements must be fulfilled. One of the most important is to obtain desired air-coal mixture flow inside burner channel. The subject of this work is three-dimensional numerical modeling of plasma gasification process inside air-coal mixture channel in thermal power plant “Nikola Tesla” - A1, Obrenovac, Serbia. Comprehensive Computational Fluid Dynamics (CFD) code FLUENT 12.1 was used for all numerical simulations reported in this work. Reactive flow field is described by the system of partial differential equations for mass, momentum, energy and species mass fractions. Additional phenomena such as turbulence, radiative heat transfer, and combusting particle chemical processes were taken into account by appropriate computational sub-models, which will be described in details in the next paragraphs. Numerical analysis has already been used to describe pulverized coal plasma treatment by number of authors. However, focus of presented models was either on describing detailed chemical processes in one dimensional laminar flow field, or on describing full scale furnace behavior during pulverized coal plasma treatment. As to authors knowledge little care was given to modeling pulverized coal gasification by means of plasma torch inside coal burner channel. There was FORTRAN based codes developed for pulverized coal ignition by means of plasma torches in air–coal dust mixture ducts. In their work authors performed numerical analysis of the influence of duct length to the thermal effect of plasma torches. However, influence of different operating parameters (as example primary air flow rates) was not taken into account. The aim of this paper is to determine the dependence of low temperature air plasma gasification efficiency of the primary air flow rate by means of three-dimensional numerical simulation.
Prof. dr Vera Šijački - Mašinski fakultet Univerziteta u Beogradu, Kraljice Marije 16
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In the last ten years many new materials became available in the boiler industry, all intended for high temperature operation. For boiler materials it is essential that they have, beside satisfactory mechanical characteristics, good heat transfer characteristics, resistance to oxidation, corrosion, creep, thermal shock, thermal fatigue and fauling. The increase of steam parameters, however, suggests usage of new modern materials. Materials for superheater/reheater tubes, apart from high creep strength have to have high resistance to corrosion from the gas side and oxidation from the steam side. Corrosion from the gas side like the oxidation from the steam side, appearing at high temperatures, are still not well understood. In this paper it is presented an short overview of new materials for boiler facilities and their characteristics concerning the gas side corrosion and steam side oxidation.