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Упит dcterms_subject_txt:additional energy engagement

343 items

  • Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas

    Predrag Pajić, Uroš Urošević, Dušan Polomčić, Milan Dimkić (2016)
    This paper describes updated calculation methodology of Danube backwater impact, occurred as a consequence of “Đerdap I” hydropower plant operation, onto the meliorated riverside areas. This methodology is based on hydrodynamic analysis of groundwater regime (size, duration, level and inflow changes) and quantification of melioration areas impairment which is caused by “Đerdap I” hydropower plant operation. By comparing the groundwater regime elements, obtained by variant hydrodynamic calculation in mathematical models for natural – not backed up and actual – ...
    HPP ''Djerdap 1'', backwater influence, groundwater regime, hydrodynamic analysis, melioration area, drainage system, additional energy engagement

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2022)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija
    ... /sectoral-engagement/ifis-harmonization-of-standards-for-ghg-accounting/ifi-twg-list-of-methodologies https://unfccc.int/climate-action/sectoral-engagement/ifis-harmonization-of-standards-for-ghg-accounting/ifi-twg-list-of-methodologies https://unfccc.int/climate-action/sectoral-engagement/ifis-harm ...
    ... later would be used as an additional input to the heat pump, in cases of insufficient flow from the WWTP. The purpose of a heat storage installation is to ensure maximal economic and environmental effects of the heat pump operation. The produced heat substitutes energy that otherwise would be produced ...
    ... Perspectives on Fourth and Fifth Generation District Heating, Energy, 227 (2021), 120520 [3] Falkoni A., et al., Utilization of RES Using Seawater Source Heat Pump with and without Energy Storage, Comparison of Thermal and Battery Energy Storage, Thermal Science, 24 (2020), 6A, pp. 3589-3600 [4] ...

  • Public participation as an element of a mineral deposit safeguarding system – international experiences

    Alicja Kot-Niewiadomska, Vladimir Simić, Michael Tost, Linda Wårell (2022)
    angažovanje zajednice, javne konsultacije, administrativne procedure, zaštita ležišta mineralnih sirovina, društvena licenca za rad

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • 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
    ... applicability, which requires a great deal of engagement, but at the same time economic feasibility with high environmental acceptability is guaranteed. • Combined scenario 4 (SC4) The results of the analysis in the first synthesis level as well as the energy security assessment for the observed scenario ...
    ... natural gas infrastructure development (OPT) is characterized with two additional supply interconnections comparable to BAU and increased capacities of additional UGSs to 1 BCM. This scenario is in line with the goals of the Energy Community in the SEE region [73] and it brings out existing interconnection ...
    ... In other words, the mentioned composition prevents unnecessary dissipation of results and contributes to additional precision and a realistic foundation for the final grade. Specifically, for energy security, the max–min concept will yield the best possible results among the worst outcomes, thus leading ...

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... economic entities. However, researches involving employee engagement are mainly focused on larger business systems. The objective of this research is to define a multiphase road map that would facilitate the improvement of employee engagement in micro-enterprises and the research method used is a case ...
    ... case study. Research results show that it is possible to develop a model of improving employee engagement in micro- enterprises with the complexity level that can be applicable. Keywords: Employee engagement improvment, Micro-enterprises, Gallup Q12 questionnarie, Work-Life Balance Wheel ...
    ... LITERATURA [1] Macey, W. H. and Schneider, B. (2008). The meaning of employee engagement. Industrial and organizational Psychology, vol. 1, no. 1, p. 3-30. [2] White, S., K. (2016). 5 hard truths about employee engagement. https://www.cio.com/article/3065617/cio-role/5-hard-truths-about- employee ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... and content can be customized using several components, such as images, tables, charts, and carousels. It also provides engagement monitoring in real time via an engagement dashboard.3 The EdX platform, recently (2012) conceived by MIT and Harvard University is aimed at supporting massive open ...
    ... by means of virtually any PC or mobile device. It features state of the art content authoring tools, as well as tools for measuring real-time engagement in virtual classes and tracking individual student progress. Another component envisaged in our TEL platform, Adobe Connect for Webinars, offers ...
    ... OER content in continuity. A similar problem might arise on the learners' side, as students might lack interest or willingness to invest some additional effort in learning and knowledge sharing. Finally, authorship issues might be also an impediment due to lack of adequate legislation regulating ...

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... Presented results indicate that additional effort is necessary for achieving of binding 27% share of renewable energy in gross final energy consumption in 2020, according to National Renew- able Energy Action Plan [18]. Pavlović, B., et al.: Availability as a Dimension of Energy Security in the Republic ...
    ... is very modest. Electricity network efficiency is low, primary due to high distribution losses. As an additional indicator, it can be used indicator of energy intensity – TM2 (ration of energy sector parameters with parameters of economic and social development of a country). Data for 2014 are used ...
    ... weak point of coal utilization in Serbia is the efficiency of energy con- version. Efficiency for electricity generation from coal is about 34%, which is below the aver- age efficiency of modern thermal power plants in Europe. With additional 83.5% of electricity transmission and distribution efficiency ...

  • Environmental Energy Security Indicators as Tools for Environmental Protection

    Aleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević (2019)
    Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...
    енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивост
    ... (OPT) is more ambitious and implies the introduction of two additional supply corridors compared to BAU and the construction of large additional underground storage facilities. This scenario is in line with the goals of the Energy Community in the SEE region [6]. Table 5. Natural gas consumption ...
    ... economic activities, while at the same time bringing some additional costs and benefits to others - the so-called negative and positive externalities [22]. In the context of environmental acceptability and the broader picture of energy security, this partial indicator describes the impact of the ...
    ... tal effect can be an important long-term indicator of (incorrect) correctness of an energy policy, but it is often difficult to determine and prove the link between an environmental disorder and the additional costs. It can also be noted that the relationship between pollution costs and pollution ...

  • 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
    ... In 2017 total primary energy supply was 667890 TJ 8. It can be characterized as highly fossil intensive – 87.88% of energy consumed in Serbia is related to fossil fuels. Almost 50% of total energy consumed in the country is related to coal -the dominant energy source in the energy sector of Serbia. Figure ...
    ... 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 ...
    ... hotspots, as they concentrate people and related energy consumption. Figure 1. Selected primary air pollutants and their sources (Energy and air pollution) This paper is aimed to determine energy related emissions in Serbia, with attention given to energy consumption in the buildings and the transport ...

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... pumps · Energy savings · Carbon dioxide emission · Energy security · Serbia Nomenclature DH District heating GHG Greenhouse gases HP Heat pump f p Primary energy factor E i Energy content of input to the system of the ith energy carrier f p,i Primary energy factor of the ith energy carrier ...
    ... of indicators are selected focusing on energy performance, energy supply, and environmental impact. Energy performance The primary energy factor (fp) determines the primary energy required to supply one unit of useful energy to the consumer. The primary energy factor is calculated by using the m ...
    ... Fraction of the ith input energy carrier/fuel in the fuel mix ( ∑ pi = 1) Id,i Import dependency of the ith energy carrier/fuel H Shannon–Wiener index FRES Share of renewable energy sources E i,RES Energy content of input to the system of the ith renewable energy carrier Qext,RES Externally ...

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Integrated energy planning approach for accelerating energy transition of households

    Boban Pavlović, Marija Živković, Dejan Ivezić (2023)
    The success of energy transition planning depends on several influential and variable factors that need to be considered and tracked in modeling to support policymakers. Expert-based energy models are mainly developed following the assumptions of experts and, in most cases, a limited number of stakeholders. This top-down modeling approach will provide satisfactory results in centrally managed energy sectors (electricity generation and distribution, district heating, etc.), where further decisions could be projected relatively precisely. However, the same approach will not ...
    Energetsko planiranje, Integrisano energetsko modeliranje, Energetska tranzicija, Domaćinstva, Individualno grejanje, LEAP

  • Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava

    Boban S. Pavlović (2022)
    Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...
    energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošača

  • The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje

    Boban Pavlović, Milica Pešić-Georgiadis (2019)
    In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...
    Obnovljivi izvori energije, potencijal solarne energije, GIS, mapiranje solarnog potencijala
    ... l), 0.2 Mtoe per year in geothermal energy, 0.2 Mtoe per year in geothermal energy, 0.1 Mtoe per year in wind energy, 0.2 Mtoe per year in solar energy and 0.04 Mtoe per year in biodegradable part of waste (Republic of Serbia, 2013). Total primary energy production from RES in Serbia in 2018 ...
    ... (Ministry of Mining and Energy, Republic of Serbia, 2018). In the total domestic production of primary energy from renewable energy sources, the largest share has biomass (56%), then hydropower (38%), wind power (5%), while biogas, solar energy, and geothermal energy participate with 1% in total ...
    ... Conference on Energy and Climate Change, 9-11 October 2019, Athens - Greece Share in Total Primary Energy Production from Renewables m Biomass m Hydropower m Wind power m Biogas, Solar, Geothermal energy Figure 1: Total production of primary energy from RES in Serbia per energy source (Republic ...

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... indicator (Table 5). In this context, the technical potential is defined as achievable energy generation from RES for the given system performance, topographic, en- vironmental, and land-use constraints (NRE, 2020). Additional characteristics of RES facility operation such as efficiency, flexi- bility, mode ...
    ... The on-going global energy transition from the fossil-based to the low-carbon energy sector has increasingly been incorporated in national energy strategies. At the core of these documents is the policy of increasing the proportion of energy from renewable sources. The Serbian Energy Sector Development ...
    ... AHP (FAHP) in order to select the available RES to accomplish the energy goal in the case of Taiwan’s energy sector. The results showed that hydropower, solar energy, and wind energy will contribute to meeting the 3E policy goals (energy, environment, economy). The new fuzzy integrated Delphi-FAHP-PROMETHEE ...

  • Possibilities for Reduction of Energy-Related Air Pollution in Serbia - Exploring Energy Scenarios

    Marija Živković, Boban Pavlović, Dejan Ivezić, Aleksandar Mijatović (2023)
    Fossil fuels and biomass account for almost 93% of the total primary energy supply in Serbia. Meeting the energy needs of consumers implies a transformation of the chemical energy of fuels through combustion processes to obtain heat that can be utilized as such, or further transformed into mechanical or electrical energy. These processes have an undeniable impact on air pollution, even in cases of biofuels or hydrogen combustion. Possibilities for air pollution reduction are identified, both on the supply ...
    загађење ваздуха, сценарији енергетског развоја, Србија

  • Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition

    Boban Pavlović, Marija Živković, Dejan Ivezić (2022)
    Expert-based energy scenarios are mainly developed following assumptions of experts and, in most cases, a limited number of stakeholders. Such an approach will provide satisfactory results in centrally managed energy sectors where further decisions could be envisaged relatively precisely (electricity production/distribution, district heating systems, etc.). The same approach will provide more uncertain outcomes of future energy structure in the household sector, where decisions related to consumption, selection of energy source, or application of specific technology are made by numerous ...
    Energetska tranzicija, Grejanje domaćinstava, Individualni sistemi grejanja, Energetsko planiranje, Integrisano energetsko planiranje, ABM, LEAP, Srbija

  • 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
    ... rgf.bg.ac.rs Dejan Ivezić is Professor in Energy and Sustainable Development at University of Belgrade – Faculty of Mining and Geology, Head of the Center for Energy. He has more than 20 years of experience in research and involvement in Serbian energy planning and policy making. The State and ...
    ... value, etc.) Although obtained results show different levels of reduction in energy consumption and emission, the production of heat energy remains based on combustion processes. Therefore, some other, non-combustible energy sources should be considered in order to make the Belgrade DH system more ...
    ... in the Development Strategy of the PUC - the introduction of heat energy produced in Thermal power plant “Nikola Tesla A” (600 MW) and in CHP waste incineration plant in Vinča (56.5 MW). These projects are analyzed from energy and environmental aspects. Projections of fuel mix in Belgrade DH system ...