collector-concentrator, which would raise the heat aroundthe DHE to a temperature of up to 200 ºC(Fig.10).of ice at the poles does not only need to be due to the"greenhouse-effects".[1] The reasons for this may existeven in the Earth's crust, where surplus thermal energy“arrives” from the Earth´s core.ACKNOWLEDGMENTThe work reported in this paper is a part of theinvestigation within the research project III 4<strong>2012</strong>"Energy efficiency enhancement of buildings in Serbiaand improvement of national regulative capacity for theyare certification", supported by the Ministry for Scienceand Technology, Republic of Serbia. This support isgratefully acknowledged.Figure 10. Solar energy captured by solar collector-concentrator ofseveral 10 MW would be transported in the ground around the 1500 mlength vertical DHEs[12]In addition to obtaining cheap and environmentallyrenewable energy, by implementing these solutions thereis a real opportunity to avoid volcanic eruptions, tectonicplate shifts, earthquakes and devastating tsunamis throughreaching and intensive use of the Earth's core thermalenergy, a so-called "surplus" energy. These surplusenergies causes the increase of pressure within the coreand stress-tension in the layers of the Earth's crust thatcrack in places of previous cracks and lines of movingtectonic plates (Fig. 5). And similarly lead to volcaniceruption, which together with dislocation of tectonic platescan cause the onset of devastating earthquakes andtsunamis. Earth on a natural behavior performs theregulation of pressure and temperature inside the core.Instead of Earth itself uncontrollably activating its "safetyvalves", volcanic eruptions and tectonic plate movements,it is logical for us people to use the surplus ofenvironmental and renewable energy in a natural mannerand satisfy humanity, concurrently avoiding catastrophicdevastation. The issue of Earth’s over-heating and meltingREFERENCES[1] P.Blum, G. Campillo, W. Munch, T. Kölbel, ˝CO 2 savings ofground source heat pump systems – A regional analysis˝,Renewable Energy, vol 35, pp.122–127, 2010[2] G. Hellstrom “Thermal performance of borehole heat exchangers”,The Second Stockton International Geothermal Conference,1998[3] F. Karlsson, M. Axell, P. Fahlen, ˝Heat Pump System in Sweden˝,Country reports Task 1 – Annex 28, pp. 1-29, 2003[4] M. Kekanovic, WO/2001/059794 – Heat Echanger for geothermalheat-or cold, WIPO,16.08. 2001.[5] M. Kekanovic, A Ceh, I Hegedis, “Respecting theThermodynamics Principles of the Heat Transfer – as the MostImportant Condition for Achieving High Energy Efficiency inBuildings – Energy of the Ground and Heat Pumps – the MostReliable Alternative Energy Source”, “3 rd IEEE InternationalSymposium on Exploitation of Renewable Energy Sources”,Subotica, pp.79-84,2011[6] L. Rybach, B. Sanner, ˝Ground-Source Heat Pump Systems theEuropian Experience˝, GHC BULLETIN,pp. 16-26, March 2000,[7] B. Sanner, C. Karytsas, D. Mendrinos, L. Rybach, ˝ Current statusof ground source heat pumps and underground thermal energystorage in Europe˝, Geothermics 2003, vol.32, pp.579–588, 2003[8] www.filterclean.co.uk/aboutus.htm[9] www.analogija.com[10] www.homeofsolarenergy.com/image-files/advanta[11] http://www.dailymail.co.uk/news/article-1345586[12] http://www.solarpaces.org/Tasks/Task1/ps10.htm70
Environmental External Costs Associated withAirborne Pollution Resulted from the ProductionChain of Biodiesel in SerbiaF.E. Kiss * , Đ.P. Petkovič ** and D.M. Radaković ****University of Novi Sad/Faculty of Technology, Novi Sad, Serbia**University of Novi Sad/Faculty of Economics, Subotica, Serbia***University of Novi Sad/Faculty of Agriculture, Novi Sad, Serbiaferenc1980@gmail.com; pegy@ef.uns.ac.rs; radakovic@nscable.netAbstract—The Impact Pathway Approach was combinedwith Life Cycle Assessment method in order to evaluate theexternal costs caused by airborne emissions released duringthe production chain of biodiesel in Serbia. The externalcost associated with the production of one metric tone ofbiodiesel was estimated to be 315 EUR. The positive externaleffects resulting from the absorption of atmospheric CO 2 byrapeseed plant can reduce the overall external cost to 181EUR per metric tone of biodiesel. The agricultural stage isresponsible for 85% of the overall external cost, inparticular due to the emissions of N 2 O and NH 3 fromagricultural soil.Keywords: external costs, biodiesel, life-cycle, SerbiaI. INTRODUCTIONAn external cost, also known as an externality, ariseswhen the social or economic activities of one group ofpersons have an impact on another group and when thatimpact is not fully accounted, or compensated for, by thefirst group. Bio- and fossil diesel fuelled vehicles are animportant source of emissions of many pollutants. Theemission of these substances causes considerable damageaffecting a wide range of receptors including humans,flora, fauna and materials. For example, a road vehiclethat generates emissions of SO 2 , causing damage tobuilding materials or human health, imposes an externalcost. This is because the impact on the owners of thebuildings or on those who suffer damage to their health isnot taken into account by the road vehicle operator.Considerable attention has been focused recently onthe assessment of external costs resulted from the tailpipeemissions of bio- and fossil diesel fuelled vehicles (forreview see [1]). However, very few studies exist that haveattempted to examine the external costs associated withupstream processes, i.e. with the production chain ofdiesel fuels in Serbia. The goal of this paper is to evaluatethe external costs caused by airborne emissions releasedduring the production chain of biodiesel in Serbia. Theenvironmental external costs associated with emissionsinto water and soil, or depletion of natural resources (e.g.geological reserves of fossil fuels, land use) were nottaken into account. Therefore, the estimated external costrepresents the lower bound of the potential environmentalexternal costs arising from the production of biodiesel.In Serbian context the investigation of potentialenvironmental and social effects of biodiesel has becomeincreasingly important after the ratification of the South-East European Energy Community Treaty between EUand Serbia in 2006. By ratifying the Treaty Serbia hasaccepted the obligation to apply Directive 2003/30/ECwhich requires the utilization of biodiesel and other fuelsfrom renewable sources in transport [2].II. METHOD AND MATERIALSA three-step procedure was adopted to calculate theexternal costs associated with the production chain ofbiodiesel.In the first step the airborne emissions associated witheach of the stages in the production chain of biodieselwere quantified using the Life Cycle Inventory (LCI)analysis. The analysis was limited to the followingairborne emissions: CO 2 , CH 4 , N 2 O, NH 3 , NMVOC (nonmethanevolatile organic compounds), SO 2 , NO x (nitrousoxides), PM 2.5 (particles with diameter bellow 2.5 µm)and PM co (particles with diameter bigger than 2.5 µm).The LCI analysis was aided by the use of the SimaPro 7software.In the second step appropriate damage cost factor foreach of the airborne pollutant investigated was adopted.The damage cost factor represents the environmentalexternal cost caused by the emission of a pollutant.<strong>Final</strong>ly, the overall external cost is calculated using (1).nEC = ∑EQ i⋅Cii=1Where:EC – Total external cost associated with air pollutionfrom the production chain (EUR/mt biodiesel)EQ i – Emission quantity of pollutant i in the productionchain (kg/mt biodiesel)C i – Damage cost factor for the pollutant i (in EUR/kg)n – Number (type) of airborne pollutant(1)71
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