Прегледај по Аутор "Milić, Davor"

Сада се приказује 1 - 13 од 13
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    ANALYSIS AND EVALUATION OF KEY INFLUENCING FACTORS ON THE OPTIMIZATION OF THERMAL ENERGY CONSUMPTION IN INDUSTRIAL THERMAL POWER PLANTS
    (Vinča Institute of Nuclear, 2024) Simić, Stojan; Orašanin, Goran; Milić, Davor; Vasković, Srđan; Bakić, Vukman; Oka, Simeon; Jovanović, Marina
    In the past, the design and operation of industrial thermal power plants did not give importance to energy consumption. Due to the depletion of fossil fuel reserves and the rising of their prices, restrictions in emission of waste gases into atmosphere, and the need to reduce production costs over the last thirty years, greater attention has been paid to optimizing thermal energy consumption. Various technical, technological, and organizational measures are undertaken to reduce thermal energy consumption. This study examines the proposals for improving the efficiency of thermal energy production in four thermal power plants in Bosnia and Herzegovina. The activities aimed at improving energy efficiency are consolidated and presented through five measures. To determine the optimal measure, the criteria for evaluating each measure are defined. These criteria are analyzed and filtered by using the ISM method, and while the fuzzy AHP method was used for their weights. Finally, the fuzzy TOPSIS method for multi-criteria optimization is applied to select the optimal energy efficiency measure for the analyzed thermal power plants. Additionally, the research defines the order of implementing the selected measures to improve the energy efficiency of the studied thermal power plants.
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    ASPEKTI ENERGIJSKE EFIKASNOSTI U SISTEMIMA VODOSNABDIJEVANJA
    (Društvo za robotiku u Bosni i Hercegovini, 2016-05) Orašanin, Goran; Golubović, Dušan; Milić, Davor; Pajkić, Jovana; Doleček, Vlatko; Karabegović, Isak; Pašić, Sead
    Water systems use significant amounts of energy to the abstraction, treatment, transport and distribution of drinking water to consumers. It is not uncommon for waterwork companies to use a lot more energy than is necessary for the functioning of the water supply system. As a result, even relatively small increases in energy efficiency can contribute to the financial benefits of waterworks companies. The paper presents aspects, i. e. the possibilities of improving energy efficiency of water supply systems in each phase of water supply.
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    Consideration of Opportunities for the Optimization of Heat Energy Consumption in Industry and Energetics
    (Springer, 2020) Simić, Stojan; Orašanin, Goran; Golubović, Dušan; Milić, Davor; Batinić, Krsto
    One of the priorities of modern industrial production is the optimization of heat energy consumption. The use of different technical solutions can reduce the heat energy consumption in industry and energetics. The paper considers how the optimization of heat energy consumption is influenced by the following technical solutions: increasing the efficiency of the boiler, returning the condensate to steam boilers and using the evaporator, setting the process parameters of combustion in industrial furnaces, heat insulation of the reservoirs, vessels and installations, application of heat pumps and the use of renewable energy sources and waste materials. Each of the considered technical solutions leads to a reduction in the consumption of heat energy and emissions of waste gases into the atmosphere
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    ENERGETSKA EFIKASNOST U RAFINERIJAMA NAFTE SA POSEBNIM OSVRTOM NA TOPLOTNU ENERGIJU
    (Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku, 2019) Simić, Stojan; Orašanin, Goran; Stanojević, Miroslav; Milić, Davor
    Oil refineries are complex process plants that produce products from crude oil that have been applied in all areas of human activity. For the needs of the production process in the refineries, a relatively large amount of the heat energy is consumed. One of the basic priorities of modern production in refineries is the optimization of the heat energy consumption. The paper presents which processes and plants are the largest consumers of the heat energy as well as where are the greatest heat losses in refineries. Also, the potentials for improving the utilization of the heat energy are considered comprehensively. The largest possibilities for reducing of the heat energy losses are in steam boilers, process furnaces and heaters, distillation processes, water vapor distribution, etc.
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    FEASIBILITY STUDY FOR REPLACMENT HEATING SYSTEM ON NATURAL GAS WITH PELLET BOILERS AT PRIMARY SCHOOL "SVETI SAVA " IN LUKAVICA
    (Mašinski fakultet, Univerzitet Istočno Sarajevo, 2014) Vasković, Srđan; Gvero, Petar; Medaković, Vlado; Halilović, Velid; Milić, Davor; Marković, Biljana; Antunović, Ranko; Kraišnik, Milija
    This study describes the possibility of installation of pellet boilers for the production of thermal energy for heating in the primary school "Sveti Sava" in Lukavica. Existing heating system with natural gas turned out to be very expensive with high costs in terms of consumption of natural gas on annual level but also due to the high price of natural gas. Alternative possibility of heating premises within the school is seen in the installation of boilers that use wood pellets as an energy source. Above all, wood pellet represents an environmentally clean fuel in terms of CO2 emissions, but also because of the availability of resource from nearby factories that produce pellets, it can be used as a domestic fuel. In this way, the story of sustainable community development is encouraged, as well as the flow of capital within the community is closed .
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    KONTROLA PUMPNIH SISTEMA VODOSNABDIJEVANJA
    (Mašinski fakultet, Univerzitet Istočno Sarajevo, 2016-12) Orašanin, Goran; Simić, Stojan; Golubović, Dušan; Pajkić, Jovana; Milić, Davor
    Vodovodni sistemi su veliki potrošači električne energije. Potrošnja električne energije, kroz pumpanje vode, predstavlja najveći dio energijskih troškova u sektoru vodosnabdijevanja. U tom kontekstu širom svijeta se nastoje smanjiti troškovi električne energije vodovodnih sistema. U radu je prikazan pristup kontrole rada pumpnih stanica kojim se mogu smanjiti troškovi vodovodnog preduzeća, te i na taj način obezbjediti održivost sistema vodosnabdijevanja.
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    PREVRELI OSTATAK IZ BIOGASNIH POSTROJENJA– VISOKOKVALITETNO ĐUBRIVO
    (Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), 2023-08-02) Simić, Stojan; Milić, Davor; Orašanin, Goran; Vasković, Srđan; Blagojević, Jovana; Batinić, Krsto
    U biogasnim postrojenjima procesom anaerobne digestije se dobija biogas i prevreli ostatak – digestat. Biogas se koristi za proizvodnju toplotne i električne energije, a digestat je našao prime nu u poljoprivredi. Digestat predstavlja visokokvalitetno organsko đubrivo koje se koristi za oboga ćivanje poljoprivrednog zemljišta. U radu su prezentovane osnovne karakteristike i prednosti digstata dobijenog u biogasnim postrojenjima u odnosu na stajnjak i veštačka đubriva.
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    REVIEW OF TECHNIQUES FOR LANDFILL LEACHATE TREATMENT
    (University POLITEHNICA Timisoara, 2020-02) Smailagić, Adnan; Simić, Stojan; Golubović, Dušan; Orašanin, Goran; Milić, Davor; Batinić, Krsto
    One of the basic problems of waste management, which is in practice encountered in landfills, is the collection and treatment of wastewater. Their production, and therefore quantity, depends on the age of the landfill, types of waste, climatic conditions, etc. These wastewater must not be discharged directly into the environment without prior collection and adequate treating. Water from solid waste, as well as water infiltrated into the landfill, forms a medium in which all soluble matter is dissolved and which causes the movement of unreacted material towards the bottom of the landfill. These waters are known as leachate water. The paper presents the production and composition of leachate landfills, and reviewed the technologies that are most often applied for their treatment. It can be concluded that leachate water due to its complex composition poses environmental risks and must be managed in an environmentally friendly manner.
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    TEHNIČKI ASPEKTI KORIŠĆENJA OKLASKA KUKURUZA ZA DOBIJANJE TOPLOTNE ENERGIJE
    (Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije, Društvo za procesnu tehniku, 2024) Simić, Stojan; Milić, Davor; Orašanin, Goran; Karličić, Nikola; Obradović, Marko; Stanojević, Miroslav; Jovović, Aleksandar
    U poljoprivredi postoje velike količine biljnih ostataka koje se mogu koristiti za proizvodnju energije.Poljoprivrednu biomasu čine ostaci jednogodišnjih kultura kao što su: slama žitarica, ku-kuruzovina, oklasak kukuruza, stabljika, ljuska, koštice i dr. Oklasak kukuruza je nusproizvod koji nastaje prilikom korišćenja kukuruza. U radu se sa više aspekata razmatra upotreba kukuruznog oklaska kao goriva u pećima i kotlovima. Provedena istraživanja pokazuju da je primena ovog otpad-nog materijala prihvatljiva sa više aspekata za proizvodnju toplotne energije.
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    UTICAJ POVEĆANJA ENERGETSKE EFIKASNOSTI U INDUSTRIJI NA UŠTEDU ENERGIJE I SMANJENJE EMISIJA U ŽIVOTNU SREDINU
    (Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku, 2016) Simić, Stojan; Golubović, Dušan; Orašanin, Goran; Milić, Davor; Pajkić, Jovana
    Jedan od glavnih ciljeva savremene industrijske proizvodnje je smanjenje potrošnje energije po jedinici proizvoda. Povećanje energetske efikasnosti u industriji dovodi do smanjenja potrošnje energije, a ujedno i do smanjenja negativnog uticaja tehnoloških i energetskih postrojenja na životnu sredinu. Nizom mera i aktivnosti u industrijskim pogonima može se uticati na smanjenje potrošnje energije, a time direktno i na troškove proizvodnje. Da bi se smanjila potrošnja energije neophodna je primena savremenih tehničkih rešenja. U radu su prezentovana tehničko-tehnološka rešenja kojima se postiže racionalizacija potrošnje goriva, električne energije i vode za potrebe proizvodnog procesa u industriji.
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    UTICAJ TOPLOTNE IZOLACIJE NA SMANJENJE GUBITAKA ENERGIJE U INDUSTRIJSKIM I ENERGETSKIM POSTROJENJIMA
    (Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku, 2017) Simić, Stojan; Orašanin, Goran; Golubović, Dušan; Blagojević, Jovana; Milić, Davor
    Smanjenje potrošnje toplotne energije postiže se primenom odgovarajućih tehničkih rešenja. U cilju smanjenja gubitaka toplote u industriji i energetici primenjuje se toplotna izolacija opreme i instalacija. Pri projektovanju od posebnog značaja je izbor adekvatnog izolacionog materijala i debljine izolacije. Pored osnovnog zadatka koji se odnosi na smanjenje gubitaka toplote izolacijom se postižu i drugi efekti, kao što su: zvučna izolacija, protivpožarna zaštita materijala i zaštita pogonskih radnika od opekotina. U radu su prezentovane osnovne tehničke karakteristike i značaj toplotne izolacije. Na konkretnom primeru je izvršeno praćenja uticaja toplotne izolacije na smanjenje gubitaka toplote
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    UTICAJNI PARAMETRI NA VRIJEDNOST RELATIVNOG STEPENA PRENOSA KISEONIKA KOD SISTEMA AERACIJE SA UDUVAVANJEM VAZDUHA U VODU
    (Mašinski fakultet, Univerzitet Istočno Sarajevo, 2020-11) Simić, Stojan; Milić, Davor; Batinić, Krsto; Orašanin, Goran; Blagojević, Jovana
    Relativni stepen prenosa kiseonika u vodi (α-faktor) je bezdimenziona veličina koja predstavlja odnos zapreminskog koeficijenta transporta kiseonika za otpadnu vodu i zapreminskog koeficijenta transporta kiseonika za čistu vodu. Mnogobrojna istraživanja do sada provedena pokazuju da α-faktor ima relativno veliki uticaj pri određivanju vrijednosti standardne brzine transporta kiseonika u vodi. Pri projektovanju sistema aeracije sa uvođenjem vazduha u vodu određivanje tačne vrijednosti relativnog stepena prenosa kiseonika je od izuzetnog značaja. Relativni stepen prenosa kiseonika zavisi od više različitih veličina. U radu su razmatrani parametri koji utiču na vrijednost α-faktora. Najveći uticaj na vrijednost ovog faktor ima sastav otpadne vode, vrsta procesa aeracije, konfiguracija bazena za aeraciju, položaj i raspored distributera vazduha, protok i veličina mjehurova vazduha koji se uvode u vodu.
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    Water Supply Network Renewal Strategic Planning Utilizing the VIKOR Method
    (MDPI, 2024-01-14) Orašanin, Goran; Simić, Stojan; Košarac, Aleksandar; Vasković, Srđan; Milić, Davor
    Water networks are critical infrastructure components, ensuring the continuous supply of high-quality drinking water to consumers. To secure such water supply, regular maintenance, including the replacement of deteriorating pipelines, is essential. In this study, a methodology has been developed for determining optimal pipeline replacement solutions in water supply systems at water utilities with limited data availability. Hydraulic analysis has been conducted on the segment of 25 km of the water supply network using the free software EPANET. Applying water network optimization, eight pipeline replacement projects according to 13 pre-defined criteria have been identified and evaluated. The paper outlines the methods for evaluating the criteria, including defining specific quantitative limits. The Analytical Hierarchical Process (AHP) method was used in the paper to determine the weights of the criteria. The reason for applying this method refers to problems that involve a set of criteria with a mixed structure, including both quantitative and qualitative aspects. Also, the paper describes the steps of the multi-criteria optimization method VIKOR, used to select the optimal project. This paper, considered as case studie, describes a method, i.e. application of a new principles and an innovative way to solve a problem for developing countries.