LIST OF ACCEPTED PAPERS

List of accepted abstract for the Symposium

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  Vitomir Kravarusic - PD Panonske TE TO

  » NOVA VIZIJA TE-TO NOVI SAD – IZGRADNJA GASNO-PARNOG BLOKA VISOKE ENERGETSKE EFIKASNOSTI

  submitted by: ViKravarusic
  Abstract text

  U okviru restrukturiranja EPS-a, sagledava se nova vizija – znatno povoljnija uloga i mesto TE-TO Novi Sad kroz izgradnju novog savremenog energetski efikasnog gasno-parnog bloka za kombinovanu proizvodnju električne i toplotne energije. Zbog uspostavljenih dispariteta cena električne energije i energenata u Srbiji, tehnološke prevaziđenosti postojeće TE-TO Novi Sad i njene male energetske efikasnosti, doveden je u pitanje dalji rad TE-TO Novi Sad u uslovima otvorenog tržišta električne energije. Novi blok se planira na postojećoj lokaciji TE-TO Novi Sad (brown field project), na kojoj su obezbeđeni svi zajednički objekti. Električna snaga novog bloka se procenjuje na oko 400 MW električnih, a toplotna snaga na nešto preko 300 MW. Električni stepen korisnosti u kondenzacionom režimu se očekuje u opsegu 53 – 59 %, a u toplifikacionom 72 – 76 %. Nova kompanija će se formirati po modelu partnerstva EPS-a, Grada Novog Sada i budućeg odabranog strateškog partnera koji može obezbediti kontinualno snabdevanje novog bloka prirodnim gasom i finansijska sredstva za dokapitalizaciju unete imovine EPS-a i Grada Novog Sada u okviru zatvorenog akcionarskog društva ENERGIJA a.d. Novi Sad. Nova kompanija – ENERGIJA a.d. Novi Sad će isporučivati električnu energiju tokom cele godine i baznu toplotnu energiju toplifikacionom sistemu Grada Novog Sada. Izgradnjom novog gasno-parnog postrojenja treba da se značajno umanji planirani nedostatak električne energije u srednjeročnom periodu, odnosno do uvođenja u rad novih velikih termo blokova u kolubarskom i kostolačkom basenu.
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  Marija Milenić - dipl.inž.geol., Nenad Miloradović - spec.dipl.inž., Milan Petrović - Mr dipl.maš.inž., Bojan Bogdanović - dipl.maš.inž.

  » Obnovljivi izvori energije u JKP Beogradske elektrane

  submitted by: nesoni
  Abstract text

  Abstrakt: JKP „Beogradske elektrane“ planira primenu solarne i hidrogeotermalne energije za pripremu potrošne tople vode, grejanje i klimatizaciju. Toplana Cerak je izuzetno atraktivna lokacija za postavljanje prve solarne toplane u Srbiji, koja bi funkcionasala u okviru postojeće toplane. Lokacija na Ceraku poseduje dovoljno prostora za instalaciju solarnih kolektora, a sama toplana isporučuje toplotnu energiju potrošačima tokom cele godine. U sklopu VII javnog poziva NPEE (Nacionalni program energetske efikasnosti) za obnovljive izvore energije (OIE), zajedno su konkurisali Laboratorija za termotehniku i energetiku Instituta za nuklearne nauke “Vinča” i JKP „Beogradske elektrane“ sa projektom br. 273024 – „Istraživanje i razvoj supstitucije fosilnih goriva sunčevom energijom i biomasom u proizvodnji sanitarne tople vode u JKP Beogradske elektrane na TO Cerak“. U radu su predstavljeni neki detalji rada na goreimenovanom projektu. Toplana Konjarnik je karakterističan primer korišćenja hidrogeotermalne energija za grejanje i hlađenje. Hidrogeološka i hidrogeotermalna istraživanja trajala su od oktobra 2006. do oktobra 2007. godine. Ostvareno je grejanje zgrade od nekoliko stotina kvadratnih metara koja predstavlja „show room“, gde se posetioci mogu upoznati sa kompletnim pristupom korišćenja podzemne vode kao obnovljivog energetskog resursa.

  Abstract: The Public Utility Company „Beogradske elektrane“ is planing to apply solar and hydrogeothermal energy for domestic hot water, heating and cooling. Heating Plant Cerak is very atractive location as the first solar heating plant in Serbia, which will working as a part of existing heating plant. There is enough places for solar collectors and heating plant deliveres domastic hot water during all year. Whitin NPEE is a project No 273024 „Researchs on possibility and feasibility of the substitution of fossil fuels by solar energy in producing sanitary hot water in HP Cerak-Belgrade“ which includes Institute „Vinča“ and „Beogradske elektrane“. In this paper are presented some details from this project. Heating Plant Konjarnik is characteristic example of use of hydrogeothermal energy for heating and cooling. Hydrogeological and hydrogeothermal research has started in October 2006. and went on until October 2007. This enabled the heating of building with several hundred square metres and the setting up of a „show room“, where visitors can see a complete approach to utilization of groundwater as a renewable energy resource.
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  Prof. dr Milan Ćalović - Energoprojekt ' ENTEL, Beograd, Dr Miodrag Mesarović - Energoprojekt ' ENTEL, Beograd

  » THE VALUE OF WIND POWER PLANTS

  submitted by: mcalovic
  Abstract text

  The aim of any power plant in a power system is to supply the load in a reliabbe, economically viable and environmentaly friendly manner. Different power plants can fulfil these basic requirements in different ways with various degree of efficiency. This paper is devoted to the consideration of the behaviour of wind power plants of wind power plants in view of the common standards required to be met by the present power power producers in all of the three above mentioned major aspects (reliability, economy and ecology). A comparison with other power generating sources is carried out. The particular emphasis is placed to the organisation of modern power industry with respect to the acceptability of wind power when large scale wind farms are connected to electrical grids. Globally, wind power generation increased more than fivefold between 2000 and 2007, which gives raise to some specific problems they may involve. At the end of 2007, worldwide capacity of wind-powered generators was 94.1 gigawatts. Although wind currently produces about 1% of world-wide electricity use (2007 data), it accounts for approximately 19% of electricity production in Denmark, 9% in Spain and Portugal, and 6% in Germany and the Republic of Ireland. The specific requirements of grid management with high penetration of wind power are also discussed as different types of wind turbine generators behave differently during transmission grid disturbances. Electricity generated from wind power can be highly variable from hour to hour, daily, and seasonally. Annual variation also exists, but is not as significant. Because instantaneous electrical generation and consumption must remain in balance to maintain grid stability, this variability can present substantial challenges to incorporating large amounts of wind power into a grid system. Intermittency and the non-dispatchable nature of wind energy production can raise costs for regulation, incremental operating reserve, and (at high penetration levels) could require energy demand management, load shedding, or storage solutions. At low levels of wind penetration, fluctuations in load and allowance for failure of large generating units requires reserve capacity that can also regulate for variability of wind generation. Stored energy increases the economic value of wind energy since it can be shifted to displace higher cost generation during peak demand periods. All of these aspects are adressed with respect to the optimum penetration level of wind power to a power system.
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  Dr Miodrag Mesarović - Energoprojekt - ENTEL, Beograd

  » “BOTTOM-UP” APPROACH IN ENERGY DEVELOPMENT PLANNING

  submitted by: mmesarovic
  Abstract text

  The governments have recently set a number of targets in the fields of energy sources, energy efficiency and climate protection to be achieved in the coming years. In order to achieve these objectives, a new quality of action in energy policy is necessary: while "top down" energy policy measures have to be continued, a reverse strategic "bottom-up" approach must also be applied. Here regions and municipalities have a special role to play due to their proximity to the end consumers in the private, business and public sectors where most decisions in the energy field are actually taken. The policy framework of any country should only clearly show a "top-down" strategic approach based on major commitment in the field of energy, while the major work is to be done within local communities, taking care of locally available energy sources as well as of each energy consumption sector. This paper compares "top-down" and "bottom-up" approaches, with particular attention paid to the latter one, which appears to be the cornerstone of any energy planning, with first one used only to chech if the global energy policy targets are achieved. Modeling methodologies include "top-down" econometric models, while the "bottom-up" are based mainly on end-use models (with end-use detail such as space heating, air conditioning, lighting, etc.) and the newest in energy modeling (incorporating utility customer technology choices, customer satisfaction modeling, customer acquistion in deregulated markets and other capabilities analysis and forecasting capabilities). In actual applications, the empirical relationships are more complicated and a variety of additional modeling and statistical issues must be addressed. End-use modeling is referred to as "bottom-up" modeling reflecting the fact that energy forecasts are developed from the sum of detailed components. This explicit representation of the basic determinates of energy use in each demand sector provide forecasts based on verifiable inputs and also supports the direct representation of conservation and demand response programs, building and equipment standards, new technologies and other important factors. The IEA has provided medium to long-term energy projections using a large-scale hybrid mathematical model designed to generate detailed sector-by-sector and region-by region projections. The development and running of this model requires access to huge quantities of historical data on economic and energy variables, and thus was necessary to establish a specific data base, which differs considerably from the European standard EUROSTAT data base. Convestion between EUROSTAT data base and energy data bases used in Serbia is also presented.
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  Slobodan Vukosavic - Elektrotehni fakultet, Univerzitet u Beogradu, Beograd

  » Visokofrekventno napajanje sistema za uklanjanje letećeg pepela iz dima termoenergetskih postrojenja

  submitted by: boban
  Abstract text

  U radu će biti prikazan sistem visokofrekventnog napajanja i upravljanja namenjen elektrofiltrima. Analizirane su prednosti VF napajanja elektroprecipitatora u odnosu na 50Hz sisteme, tehno ekonomski aspekti eksploatacije VF i 50 Hz sistema, kao i uštede električne energije usled poboljšanja stepena korisnog dejstva.

  Pored toga, analizirano je i uvećanje efikasnosti izdvajanja i uvećanje stepena otprašivanja.
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  Jelena Milosavljević - EPS, Direkcija za strategiju i investicije

  » УПОРЕДНИ ПРЕГЛЕД ИНДИКАТОРА ВЕЗАНИХ ЗА ТРЖИШТЕ ЕЛЕКТРИЧНЕ ЕНЕРГИЈЕ ЕВРОПСКОГ ТРЖИШТА

  submitted by: jelenamilosavljevic
  Abstract text

  Један од основних циљева Уговора о енергетској заједници земаља Југоисточне Европе ESCEE TREATY (у даљем тексту: ЕТ) је стварање јединственог тржишта електричне енергије и гаса земаља потписница ET са енергетским тржиштем Европске Уније (у даљем тексту: ЕУ). За праћење функционисања и учествовање на овом тржишту потребно је прецизно познавати стање на тржишту, односно имати поуздане економско-енергетске статистике земаља учесница.

  Између земаља чланица ЕУ и земаља у региону постоје битне економске, демографске разлике, разлике у стадијумима извршених реформи, нивоу либерaлизације тржишта електричне енергије, ценама електричне енергије. Да би поређење различитих показатеља било конзистентно потребно је обезбедити примену јединствене методологије.

  У овом раду приказана је анализа неких од индикатора земаља учесница европског тржишта електричне енергије. Дефинисање, праћење и анализа статистичких индикатора описују тренутно стање, али и дају поставке за прогнозу даљих кретања на тржишту.

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  BENCHMARKING OF INDICATORS CORRELATED TO EUROPEAN ELECTRICITY MARKET

  One of the basic objectives of the Energy Community Treaty of the South Eastern Europe (ESCEE TREATY, further in the text: ET) is to build a unified electricity and gas market for countries signatories of ET and the European Union (further in the text: EU) market. As to monitor and participate in that market, there is a need to have a strict economy-energy statistics of the participants.

  There are numerous economic, demographic differences, different stages of reforms, the levels of liberalization of the electricity market, the prices of electricity between EU member states and regional countries. As to consistently compare different indices, a universal methodology needs to be applied.

  This paper presents analysis some of the indicators correlated to countries-members of the European electricity market. By defining, following up and analyzing of statistical indicators, an insight of the situation on the market is provided, as well as the prediction basis of further market movements.
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  Bumsoo Han - EB TECH Co., Ltd. 550 Yuseong-gu Yongsan-dong, Daejeon 305-500, Korea , Sung-Myun Kim - EB TECH Co., Ltd. 550 Yuseong-gu Yongsan-dong, Daejeon 305-500, Korea, Wongu Kang - EB TECH Co., Ltd. 550 Yuseong-gu Yongsan-dong, Daejeon 305-500, Korea , M.J. Lee - Korea Atomic Energy Research Institute, Jeongeup 580-185, Korea, R.A. Salimov - Budker Institute of Nuclear Physic, Lavrentiev prospect 11, Novosibirsk 630090 Russia, N.K. Kuksanov - Budker Institute of Nuclear Physic, Lavrentiev prospect 11, Novosibirsk 630090 Russia

  » MOBILE ELECTRON ACCELERATOR FOR FLUE GAS TREATMENT

  submitted by: bshan
  Abstract text

  Industrial activities to produce heat and electrical energy are responsible for emitting a large number and amount of pollutants, such as fly ash, sulphur oxides (SOX), nitrogen oxides (NOX) and volatile organic compounds, into the atmosphere. To reduce such pollutants, electron beam treatment process has been introduced. Electrons interact with gas creating divergent ions and radicals including oxidizing radicals and excited species. These excited species react in a various ways to convert SOX and NOX into a dry product containing (NH4)2SO4 and NH4NO3 that was usable as a fertilizer.

  Due to the necessity of pilot scale test facility for continuous treatment of gaseous wastes on the spot, a mobile electron beam irradiation system mounted on trailer is under development in EB TECH Co. Ltd. This mobile electron beam irradiation system is designed for the individual field application with self-sustaining systems, such as electric generator, cooling system etc. This mobile electron accelerator is self-shielded with steel plate and lead block which will satisfy the required safety figures.

  Design parameters are limited by the allowable total weight and height of the trailer on the road which controlled by Government regulation. Therefore, the output parameter of e-beam is designed for 0.6MeV and 20kW through 600mm window. This mobile unit will be used for on-site test of flue gases from the power plant by Korea Atomic Energy Research Institute (KAERI) and EB TECH Co. Ltd. This unit could treat up to 10,000 Nm3 of gases per day.
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  Maja Stipić, Mileva Vasić - Energoprojekt Entel

  » Postizanje energetske efikasnosti kroz povećanje snage bloka na primeru bloka A6 TE "Nikola Tesla"

  submitted by: SofiAlek
  Abstract text

  Postizanje energetske efikasnosti kroz povećanje snage bloka

  na primeru bloka A6 TE “Nikola Tesla A”

  Apstrakt. Predmet ovog rada je sagledavanje tehničkih mogućnosti i ekonomsko-finansijske opravdanosti povećanja snage bloka A6 u odnosu na projektne parametre. Naime, s obzirom na činjenicu da je prosečna starost termoelektrana koje su u vlasništvu JP „Elektroprivreda Srbije“ oko 25 godina i da su mnoge iscrpele svoj projektni vek, neophodno je izvršiti njihovu modernizaciju i rekonstrukciju, kako bi se njihovi tehnički parametri vratili na projektne vrednosti. S druge strane, energetska situacija u Republici Srbiji, kao i u zemljama okruženja je takva da je neophodno što pre uključiti u pogon novi proizvodni kapacitet. Kako izgradnja takvog objekta nije ni počela, a imajući u vidu da taj proces traje dugo, potrebno je naći druge načine kako bi se nadomestio nedostatak električne energije. Jedna od mera kojom se to može postići je povećanje snage blokova u postojećim termoelektranama. Na taj način obezbediće se siguran, pouzdan i ekonomičan rad ovih postrojenja, uz istovremeno povećanje energetske efikasnosti i zadovoljenje savremenih zahteva u pogledu zaštite životne sredine. U ovom radu je analiziran uticaj ovih mera, pre svega na ekonomski aspekt poslovanja, sa kraćim osvrtom na ostale aspekte.

  Achieving the increased energy efficiency though the thermal power plant power output increase - example of TPP Nikola Tesla A6

  Abstract. The paper considers technical and economical feasibility of power increase in the unit A6 of the TPP Nikola Tesla A, compared to its operation as designed. Having in mind that the average age of power plants under the ownership of the Public Company - Electric Power System of Serbia is about 25 years and that their originally designed lifetime has expired, it is understandable that the plants have to be modernized and reconstructed in order for their working parameters to be returned to designed values. On the other hand, current situation in the energy sector in the Republic of Serbia and the countries in the surrounding requires immediate erection of new electricity producing capacity. Since construction of such facility has not yet started and having in mind that erection would take several years, it is necessary to find other ways to reduce the deficit in electricity production. One of the proposed measures refers to the power increase in the existing thermal power units. Such measure would provide secure, reliable and economical way of plant operation, with increased efficiency of energy production and fulfilment of environmental requirements. The paper analyses the effects of such measure, primarily on economical aspects of plant operation, with short reflection on other aspects as well.
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  Branislav Kovačević - JP Elektroprivreda Srbije, Vojvode Stepe 412, Beograd, Vojislav Ibrahimović - JP Elektroprivreda Srbije, Vojvode Stepe 412, Beograd, Darko Nikolić - JP Elektroprivreda Srbije, Vojvode Stepe 412, Beograd

  » Značaj prijemnog kontrolisanja u pripremi i realizaciji međunarodnih ugovora

  submitted by: darkon
  Abstract text

  Otkad je onih koji prodaju i onih koji kupuju, interesi su im bili suprotstavljeni. Kupac je oduvek u fazi kupovine vršio ispitivanje i / ili kontrolisanje proizvoda koji je bio predmet njegovog interesovanja. Predmet ovog rada je da prikaže neophodne aktivnosti u pripremi i realizaciji međunarodnih ugovora kao i kontrolu usaglašenosti proizvoda sa zahtevanim.

  Abstract: Ever since goods had been bought and sold, buyers and sellers had conflicting interests. Buyer had always conducted an inspection and/or test of the product of interest. This paper will present the actions necessary in preparation and execution of international contracts as well as assessment of product conformity to requirements.
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  M. S. Laković - Mašinski fakultet Niš, ul. A. Medvedeva 14, 18000 Niš, S. V. Laković - Mašinski fakultet Niš, ul. A. Medvedeva 14, 18000 Niš, P. M. Živković - Mašinski fakultet Niš, ul. A. Medvedeva 14, 18000 Niš

  » UTICAJ GLOBALNOG ZAGREVANJA NA RAD TERMOELEKTRANA

  submitted by: lmirjana
  Abstract text

  Sve izrazitije klimatske promene, nastale kao rezultat globalnog zagrevanja, utiču na sve postojeće izvore energije. Iako se može reći da su ovom uticaju podložniji obnovljivi izvori energije, i rad postrojenja koja koriste fosilna goriva umnogome je odredjen temperaturom vazduha i vode. Direktan uticaj globalnog zagrevanja vezan je za rad rashladnog sistem postrojenja i količine vode dostupne za hladjenje. Lokalni klimatski parametri direktno utiču na kapacitet rashladnih tornjeva i mogućnost prirodnih vodotokova da odvedu toplotu iz kondenzatora termoelektrane. U toku letnjeg perioda, ulazna temperatura rashladne vode se može približiti vrednosti koja prestavlja graničnu temperaturu izlazne struje s obzirom na ekološka ograničenja. Na taj način postrojenje nece raditi ni blizu punom kapacitetu. Neophodno je tehnološko unapredjenje rada postojećih rashladnih sistema, kako bi se ubuduće sprečio značajan pad efikasnosti rada postrojenja. U ovom radu prikazan je uticaj porasta temperature rashladne vode u nekim termoelektranam u Srbiji na njihovu efikasnost. Rezultati su dobijeni na osnovu meteoroloških podataka i numeričke simulacije i kao takvi mogu dati korisne smernice pri projektovanju novih, kao i u stalnim naporima da se unapredi rad postojećih termoelektrana.

  EFFECTS OF GLOBAL WARMING ON THERMAL POWER PLANT PERFORMANCES

  Abstract: Every existing source of energy is affected by climate variability. Renewable energy sources tend to be more sensitive to global warming, but fossil energy production is also affected by air and water temperatures. The most direct climate impacts are related to power plant cooling and water availability. Local weather conditions affect the capacity of cooling towers and natural water bodies to transfer waste heat from steam condensers to the atmosphere. Under hot summer conditions even the inlet water from a river may approach the limit set for discharge, and this will mean that the plant is unable to run at full power. Without technology-based improvements in cooling system efficiency, the steam-cycle energy efficiency would decrease. In this paper, the overview of cooling water temperature increase impact on the energy efficiency in Serbian power plants is given, based on meteorological data and numerical simulation. Obtained results could be used as useful guidelines in design of the new power plants and also in improving existing power plants performances.