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Упит dcterms_subject_txt:power plants

141 items

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude

    Ivana M. Jovanović (2016-01-13)
    U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...
    flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže
    ... mineral processing plants. In: Advanced Control and Supervision of Mineral Processing Plants (Edited by D. Sbárbaro, R. del Villar), Chapter 7, pp. 287–308. 45. Cisternas, L.A., Lucay, F., Gálvez, E.D., 2014. Effect of the objective function in the design of concentration plants. Minerals Engineering ...
    ... Machine learning strategies for control of flotation plants. Control Engineering Practice, Vol. 5, No. 2, pp. 263–269 5. Aldrich, C., Schmitz, G.P.J., Gouws, F.S., 2000. Development of fuzzy rule-based systems for industrial flotation plants by use of inductive techniques and genetic algorithms. ...
    ... Lundh, M., Gaulocher, S., Pettersson, J., Lindvall, H., Gallestey, E., 2009. Model Predictive Control for Flotation Plants. In: Process control applications in mining and metallurgical plants (Proceedings of 48th Annual Conference of Metallurgists COM 2009), August 26-29, Sudbury, ON, Canada, pp. 121–130 ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Integrative GHG Assessment in Oil and Gas Industry

    Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa (2023)
    Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...
    energetska tranzicija, gasovi staklene baste, industrija, nafta i gas
    ... emissions, including the exploration and exploitation of energy sources, conversion of primary cnergy sources into usable forms in refineries and power plants, transmission and distribution of fucls, and the use of fuels in stationary and mobile applications. These activities result in emissions of ...
    ... emission factors. Country-specific factors can vary e> energija, ekonomija, ekologija, 2023, god. XXV, br. 1 betwecen fucis, technologies, individual plants, etc. The use of country-specific cmission factors derived from #detailed information is cxpccted to reduce thc uncertaintics in the estimation ...
    ... Voldsund, M., Reyes-Lua, A., Fu, C., Ditaranto, M., Neksa, P., Mazzetti, M.J., Brekke, O., Bindingsbo, A.U., Grainger, D., Pettersen, J. Low carbon power generation for offshore oil and gas production, Energy Conversion and Management: X, Vol. 17, 100347, 2023. https://doi.org/10.1016/j.ccmx.2023.100347 ...

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... of thermal power plants “Kostolac A” and “Kostolac B”, we have the fifth level of emissions of sulfur oxides (from 50,000 to 100,000 t/year) and nitrogen (from 5000 to 10,000 t/year). Based on the spatial distribution of the particulate emissions, it is concluded that thermal power plants “Kostolac A” ...
    ... Cvijanovic, D. Internal Documentation of Measurement Results for the Emission of Sulfur Dioxide, Soot and Particulate Matter in TPP “Kostolac”; Thermal Power Plants and Mines Kostolac: Kostolac, Serbia, 2015. (In Serbian) 20. Streimikiene, D.; Sivickas, G. The EU sustainable energy policy indicators framework ...
    ... of the country. Thermal power plant “Kostolac A” and “Kostolac B” are in the third and fourth place according to the emission levels of sulfur oxides. Thermal power plant “Kostolac A” was in fourth place according to the level of nitrogen oxide emissions, while thermal power plant “Kostolac B” was in ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... age are the most important energy source in Serbia. Almost all lignite production (90%) from the Kolubara and Kostolac basins is used in thermal power plants (TPP), (EPS, 2018). Information on the content, distribution and mode of occurrence of major and trace elements, especially po­ tentially toxic ...
    ... 13–21. KARAYIGIT, A.I., GAYER, R.A., QUEROL, X. & ONACAK, T. (2000): Contents of major and trace elements in feed coals from Turkish coal fired power plants.– In­ ternational Journal of Coal Geology, 44, 169–184. doi: 10.1016/S0166­5162(00) 00009­4 KARAYIGIT, A.I., GAYER, R.A., ORTAC, E.F. & GOLDSMITH ...
    ... According to previous research (CHOU, 2012; LI et al., 2007, 2010; WARD, 2016) in neutral to alkaline groundwater Ca and S could be taken by peat forming plants in the palaeomire and bound with organic matter. Xylite­rich and mixtures of xylite­rich and matrix coals with prevalence of telohuminite occur ...

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... Joganoscku, Hoaop IfeweQcku - Oaiiaaaaaaaaanaanoı 308 )lenonnpalbe H yripaByBatbe co OoTIIaJI MANAGEMENT OF SLUDGE FROM WASTEWATER TREATMENT PLANTS Tvana Postolova, Sonja Lepitkova, Blagica Doneva, Ivica 4Andov . 318 IIlerru KogHrpec Ha I econosaare Ha PenyOnka CeBepHa MakcJuoHuja Fifth Congress ...

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... 5-7m thick, occurs around elevation 95-97 and upwards, wilh an interlayer of sand- |between 102-104 masl. Silty to silty-sandy, containing traces of plants and carbonate silt along them. |Light brown in color, with tubular macropores 1-2mm wide to a maximum of 1cm. Dry, soft and crumbly, it |is kept ...
    ... 5-7m thick, occurs around elevation 95-97 and upwards, with an interlayer of sand between 102-104 masl. Silty to silty-sandy, containing traces of plants and carbonate silt along them. Light brown in color, with tubular macropores 1-2mm wide to a maximum of 1cm. Dry, soft and crumbly, it is kept ...
    ... 5-7m thick, occurs around elevation 95-97 and upwards, wilh an interiayer of sand |betwveen 102-104 masl. Sity to silty-sandy, containing traces of plants and carbonate silt along them. | ight brownin color, wilh tubular macropores 1-2mm wide to a maximum of 1cm. Dry, soft and crumbly, it is kopt ...

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... maceral, formed through the thermal alteration of the remains of higher plants, and dispersed vitrinite particles are present in almost all sedimentary rocks from Devonian times onwards, i.e., since the evolution of the vascular plants. Vitrinite re�ectance is one of the most widely used and accepted ...
    ... maceral, formed through the thermal alteration of the remains of higher plants, and dispersed vitrinite particles are present in almost all sedimentary rocks from Devonian times onwards, i.e, since the evolution of the vascular plants. Vitrinite reflectance is one of the most widely used and accepted maturity ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... Figure5.4 Optical sensors Pressure sensors play a crucial role in detecting issues with submersible pumps in various industrial applications. In power plants, these sensors enable precise measurement of pressure in water supply systems and condensers, which is essential for the safety and efficiency ...
    ... particulates. Figure5.8 Vortex sensors Flow sensors play a crucial role in detecting issues with submersible pumps across VarioOus sectors. In power plants, these sensors assist in monitoring the flow of steam, cooling fluids, and fuels, which is critical for identifying problems in the operation ...
    ... measurement across a wide range of environments and conditions, which is essential for identifying and addressing problems with submersible pumps. In power plants, temperature sensors help monitor the temperature of cooling and fluid systems, allowing for the timely detection of overheating or other ab ...

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... insight can further be transformed into useful new knowledge which the management in a mine plant needs for decision making. Managements of mine plants that implement BI tools can make timely decisions of a higher quality thus improving the overall work safety of their employees. In this paper ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... of an ecosystem previously destroyed by mining contamination. When it comes to reallocating and rehabilitating land after coal extraction, solar plants on conversion sites provide a win-win solution for all participants. The energy efficiency and construction capabilities of solar modules allow for ...
    ... change in terrain morphology (PK "Novi Kostolac", "Klenovnik" and "Ćirikovac", with disposal sites for overburden and ash, i.e., slag from the thermal power plant). similar of the relief changes in the originally flat Stig - south and east of Drmno (PK "Drmno", with coal overburden deposits). In choosing ...
    ... coal mining in a way that balances ecological health with economic needs. One of the solutions was to combine ecological restoration with a solar-power generation base, thereby creating a situation with ongoing economic viability. Using reclaimed mine land for solar energy projects is very attractive ...

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... natural gas, mainly because of combined heat and power production gas usage in industrial plants as well as in new gas plants with a combined cycle. Gas plants should be very important in the future, covering daily and seasonal unavailability of plants producing electricity from intermittent renewable ...
    ... renewable energy sources (wind and solar) [68]. According to [2,74], planned capacities of these plants are from 3 MWe to 140 MWe, with thermal load between 40 and 200 MW. Table 5. Natural gas consumption demand projection until 2030 [73]. Scenario HIST Scenario HIGH Scenario Projections 2020 2025 2030 2020 ...
    ... multi-criteria analysis; fuzzy theory 1. Introduction Energy is an essential ingredient for the world’s development. Energy represents a vital source of power for all social and economic activities and a unique part of the sustainable development puzzle. A key priority for almost all countries is the energy ...