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Упит dcterms_subject_txt:емисија гасова

388 items

  • The different approaches in seismic stratigraphy interpretation

    Dejan Radivojević (2018)
    U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.
    seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology
    ... 10%) and an unresolved hump with no individual compounds above 1%, accounted for the rest. 2.2. Gas chromatography-mass spectrometry (GC-MS and GC-MS-MS) GC-MS was carried out using an Agilent 6890N gas chro- matograph connected to a Waters (Micromass) Quattro Micro GC tandem quadrupole mass spectrometer ...
    ... �C/min, followed by an isothermal period of 15 min at 300 �C. Helium (flow 1.2 cm3/min) was used as carrier gas. Commercial CO2 was injected at the beginning and end of each analysis as monitoring gas, calibrated against the NBS-19 reference material. Each sample was analysed in duplicate. Stable isotope ...
    ... 10%) and an unresolved hump with no individual compounds above 1%, accounted for the rest. 2.2. Gas chromatography-mass spectrometry (GC-MS and GC-MS-MS) GC-MS was carried out using an Agilent 6890N gas chro- matograph connected to a Waters (Micromass) Quattro Micro GC tandem quadrupole mass spectrometer ...

  • Увођење доменских и семантичких маркера за област рударства у српске електронске речнике

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja

  • Višenamenski autonomni sistem za daljinsko praćenje parametara stanja u rudnicima i okruženju, aplikativni softver

    Kričak Lazar, Rikalo Aleksandar, Negovanović Milanka, Mitrović Stojan (2015)

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... dioksid (SO2) koji ima ključnu ulogu. U atmosferu se SO2 emituje iz antropogenih i prirodnih izvora (vulkanski gasovi i emisija anaerobnih sredina), mada se procenjuje da više od 70% globalne emisije SO2 oslobađaju antropogeni izvori [5]. Glavni antropogeni izvor SO2 jeste sagorevanje fosilnih goriva koja ...
    ... toplotni izvor čine tri kotlovske jedinice kapaciteta od po 8,2 MW (24,6 MW), a kao pogonsko gorivo koristi se prirodni gas [27]. Sagorevanjem prirodnog gasa ne dolazi do emisije SO2, osim kada sadrži male količine H2S [28]. Najveća masa prašine akumulirana u jednom danu po cm2 površine lista zabeležena ...
    ... Gorivni galvanski spregovi su elektrohemijski sistemi u kojima se energija proizvodi na bezbedan način, bez sagorevanja i u idealnom slučaju bez emisije štetnih gasova. Ekološki najpovoljnije gorivo za gorivni spreg je vodonik, jer se oksidacijom vodonika i redukcijom kiseonika kao jedini proizvod reakcije ...

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)

  • The State and Perspective of Belgrade District Heating System Development

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Fethi Silajdžić, Samra Arnaut, Goran Đelić (2019)
    District heating (DH) system in Belgrade provides energy for heating of more than 21 million m2 in households (app. 50% of all households), public, commercial and industry sectors. Public Utility Company “Beogradske elektrane” is responsible for all segments of the DH system operation. The system is fueled mostly by natural gas. The share of renewables is negligible. The research analyzes effects of implementation of two main projects proposed in the Development Strategy of the PUC - the introduction of ...
    daljinsko grejanje, Beograd, razvoj

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)
    ... KatME CalcKatME CalcEval Gas FakGas FakMix GasEval CalcFakMix CalcFakGas Gas1-2 KatGas1-5 Noise TimeNoise KatNoise NoiseEval Noise1-6 Climate KatClima ClimaEval CalcKatClima AirLoss1-4 ParametClima D, E, F, Fi, H, L Ro, Ros, S, v, Xi Psychro Gas-i GasType ConcGas MDKGas ...
    ... This global goal is subdivided into a hierarchical structure of subgoals where each subgoal can be viewed as the estimation of a set of parameters (gas, dust, climate, noise, vibration, illumination, geotechnical hazard) which determine the general mine safety state and category of hazard in mining ...
    ... parameters that are classified into several basic criteria for estimation of mining environment. These criteria are related to the following conditions: gas, dust, climate, noise, vibration, illumination and geotechnical hazard (highwall stability and waste stability). In discussing occupational risks ...

  • Одређивање оптималних параметара цевовода за двофазни проток

    Николина Ћурчић (2024)
    Eфикасно управљање протоком флуида је кључно за оптимизацију перформанси система и обезбеђивање оперативне сигурности. Двофазни ток, који подразумева истовремено присуство течне и гасне фазе унутар цевовода и измењивача топлоте, представља један од најсложенијих аспеката динамике флуида. Овај феномен намеће јединствене изазове који захтевају дубоко разумевање и прецизно планирање. Ефикасно управљање двофазним током није само кључно за одржавање ефикасности система, већ је и неопходно за спречавање потенцијалних проблема као што су повећана ерозија, неочекиване флуктуације притиска и ризици по безбедност. У ...
    евовод, оптимизација, двофазни проток, параметри цевовода, трошкови
    ... Logistic, B. (n.d.). Transport nafte i gasa cevovođdima/gasovodima. Retrieved from Beocontrol Logistic: https:/fransportrobe.com/transport-nafte-gasa/transport- nafte-gasa-cevovodima-gasovodima/ NaturalGas. (2013, September 20). 7The Transportation of Natural Gas. Retrieved from NaturalGas.org: ...
    ... (2016, June 14). An Introduction to Oil and Gas Pipelines. Retrieved from FracTracker Alliance: https://www.fractracker.org/2016/06/introduction-oil-gas- pipelines/ Arya, A. K. (2022). A critical review on optimization parameters and techniques for gas pipeline operation profitability. owrma! ...
    ... com/pipe-flow-vs-pressure- relationship-calculate/ 37 Kurth, N. (2019, May 21). 7wo Phase Flow Liquid-Gas System Design. Retrieved from FluidFlow: · https://blog.fluidflowinfo.com/two-phase-liquid-gas-flow-system- design Liu, H. (1998, September 8). Pipeline technology. Retrieved from Britannica: ...

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Daljinsko merenje temperature na bušotinskom cevovodu

    Aleksa Petrović (2024)
    Ovaj diplomski rad analizira daljinsko merenje temperature na bušotinskim cevovodima, koje je od velike važnosti za kontrolu i nadzor nad industrijskim procesima posebno u ekstremnim uslovima kao što su visoke temperature i pritisci u bušotinama. Opisane su različite vrste temperaturnih senzora, kao što su termoparovi, bimetalni i otpornički termometri, kao i senzori na bazi optičkih vlakana, koji se primenjuju za kontinualno merenje temperature duž cevovoda u realnom vremenu. Daljinsko merenje temperature omogućava pravovremeno otkrivanje curenja i nepravilnosti, što je ...
    temperatura, daljinsko merenje temperature, bušotinski cevovodi, DTS sistemi, infracrveni senzori, bežične mreže
    ... Otpornost na okruženje i uslovi u kojima se senzor koristi. U ekstremnim uslovima, kao što su visoke temperature, pritisci ili prisustvo korozivnih gasova, koriste se specijalizovani senzori za distribuirano merenje temperature. . Cena ı složenost sistema: U mnogim slučajevima, izbor metode zavisi ...
    ... Manometarski termometri Rade na principu promene pritiska unutar zatvorene posude u zavisnosti od temperature. Koriste različite medije kao što su gasovi, tečnosti ili isparljive supstance. Promena pritiska se prenosi na pokazivač, koji pokazuje temperaturu objekta. Ovi termometri su posebno korisni ...
    ... brzo reagovati na promene temperature, kao i u aplikacijama sa visokim pritiscima. Mediji koji se koriste u manometarskim termometrima mogu biti gasovi (najčešće azot ili helijum) za veće temperaturne opsege, tečnosti poput alkohola za niže temperature, ili isparljive supstance koje se koriste ...

  • Избор одговарајуће механичке методе

    Анастасија Мирјанић (2024)
    Експлоатација нафте и гаса кључна је за задовољење глобалних енергетских потреба. Различите методе се користе за ефикасно вађење тих природних ресурса из земљe. Механичке методе експлоатације, које укључују различите врсте пумпи и компресора, играју значајну улогу у овом процесу. У нафтној индустрији, ефикасно вађење нафте и гаса зависи од избора одговарајуће технологије пумпања. Две од најраспрострањенијих технологија су дубинске пумпе са клипним шипкама (енгл. Sucker rod pumps- SRP) и електричне потапајуће пумпе (енгл. Electrical submersible pump- ESP). Овај завршни рад ће ...
    дубинске пумпе са клипним шипкама, замена, електрична потапајућа пумпа, производња, бушотина

  • 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
    ... potential energy of the fluid. Free gas in the fluid can negatively affect the pump's efficiency, especially at low pressure and during gas-liquid two-phase flow at the bottom of the well. To minimize the detrimental effects of gas, gas anchors are used to separate gas bubbles from the oil, thereby ...
    ... study. 57 Type of Operation Modes and Automation Fails Number of Cards Normal 10,282 Gas interference 260 Fluid pound 38,298 Traveling valve leak 67 Standing valve leak 172 Rod parted 29 Gas lock 6 Tubing anchor malfunction 30 Sensor fault—rotated card 895 Sensor fault—line card ...
    ... balance via counterweights on the main lever and balance beam. 2.1.2 Subsurface equipment for deep well pumping includes: a) Downhole pump b) Gas anchor c) Tubing anchor d) Sucker rods e) Tubing The downhole pump converts mechanical work into potential energy by increasing the fluid pressure ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт

  • Towards more sustainable district heating systems in Serbia - Options and obstacles

    Marija Živković, Boban Pavlović, Dejan Ivezić, Miloš Tanasijević, Dejan Stojanović (2024)
    The major share of energy consumed in the building environment is dedicated to meeting heating needs, which makes this sector one of the key players in the transformation of the whole energy system. The accurate approach to the transition process assumes acting on both the demand and supply sides. Lately, the supply side has received more attention, as its transformation is one of the key steps of the energy transition process. District heating systems are recognized as substantial contributors ...
    energetska tranzicija, daljinsko grejanje, dekarbonizacija, obnovljivi izvori energije, prepreke, Srbija

  • Ventex: an expert system for mine ventilation systems analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    roblems relating to mine ventilation systems analysis are usually of a very complex nature. They involve the estimation of numerous interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, fire risk and dangerous dust pollution risk. The solution to these problems relies, to a great extent, on numerical methods. With the development of computer technology these methods were incorporated as numerical routes in software packages, such as the mine ...
    expert system, mine ventilation
    ... interdependent parameters pertaining to the network status, ventilation status, ventilation system stability, air current losses, climate conditions, gas state, �re risk and dangerous dust pollution risk. The solution to these problems relies, to a great extent, on numerical methods. With the development ...