1. Analiza trga električne energije v izbranih državah eu in ocena možnosti zamenjave dobaviteljev električne energijeTinka Petrič, 2025, undergraduate thesis Abstract: Energetika kot kompleksna gospodarska panoga vključuje proizvodnjo, distribucijo in porabo električne energije, ki je ključni dejavnik sodobnega življenja. V diplomskem delu raziskujem trg električne energije z analizo izbranih držav (Slovenija, Nemčija, Madžarska, Francija in Finska). Zanima me vpliv deleža električne energije, proizvedene iz obnovljivih virov energije (OVE), na ceno električne energije in kako se ti dejavniki med seboj povezujejo. Uporabljam Pearsonov koeficient korelacije, da analiziram moč povezave med spremenljivkama, kar omogoča podrobnejši vpogled v to dinamiko. Temeljni zaključki naloge kažejo, da večji delež električne energije, proizvedene iz OVE, v proizvodnji električne energije lahko vpliva na cene električne energije in tudi postavlja temelje za dolgoročno trajnostno oskrbo. Kljub temu pa v nekaterih državah višji delež električne energije, proizvedene iz OVE, vodi do višjih cen električne energije, kar lahko vpliva na konkurenčnost dobaviteljev.
Trajnostna naravnanost Evropske unije dodatno podpira ta prizadevanja, saj nalaga obveznost doseganja ambicioznih ciljev, ki se osredotočajo na povečanje deleža OVE v proizvodnji električne energije in prehod na brezogljično oskrbo energetskega sistema do leta 2050. Ti cilji usmerjajo politike držav članic in vplivajo na razvoj energetskih trgov, kar dodatno krepi pomen raziskovanja povezave med deležem električne energije, proizvedene iz OVE, in cenami električne energije v različnih državah.
Poleg analize trga se v nalogi osredotočam tudi na ozaveščenost potrošnikov o možnostih zamenjave dobaviteljev električne energije ter na analizo obstoječih dobaviteljev na slovenskem trgu. Z raziskavo želim prispevati k razumevanju, na podlagi katerih dejavnikov potrošniki sprejemajo odločitve o izbiri dobavitelja električne energije.
Keywords: Energetika, dobavitelji električna energija, potrošniki, primarni viri energije, cene, Slovenija.
Published in DKUM: 23.10.2025; Views: 0; Downloads: 2
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2. Comparative analysis of life cycle impact assessment methods for packaging productsGregor Radonjič, Matjaž Denac, 2025, published scientific conference contribution Abstract: In assessing environmental impacts of packaging, it is necessary to use modern software tools, supported by verifiable databases based on the environmental life cycles of products. There are several software solutions that differ greatly from each other in terms of the complexity of life cycle modeling, accessibility to databases, LCIA methods used to determine environmental impacts, and the dynamics of database updating. The aim of this paper is to conduct LCA study for the case of a two-layered polymeric film made from low density polyethylene (PE-LD) and polyamide-6 (PA-6) laminated plastic packaging film using several LCIA methods to compare and comment the final LCA results in terms of the life-cycle environmental impacts. Results clearly show that the choice of LCIA method for evaluating environmental impacts within LCA study has a very large impact on the final result.
Keywords: packaging, life cycle assessment, LCIA methods, environmental impacts
Published in DKUM: 23.10.2025; Views: 0; Downloads: 5
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3. Agricultural and food product assessment : methodological choices in sustainability reporting using the LCA methodTinkara Ošlovnik, Matjaž Denac, 2025, original scientific article Abstract: Consumers are increasingly exposed to environmental claims on food products. These claims often lack scientific validation and there are different methodologies that can be used for grounding these claims, which can lead to misleading results. The European Union’s (EU) Environmental Footprint methodology excludes the aggregation of environmental impacts, including damage to human health. This fact reduces transparency and limits the consumers’ ability to make information-based sustainable choices. This study aims to address this issue by calculating aggregated impacts on human health via life cycle assessment (LCA) in the agriculture and food-production sectors. In the study the IMPACT World+ method was used, including trustworthy databases and proper functional unit definition. The assessment encompassed three types of vegetables, four types of fruit, and four types of ready meals. The study also attempts to assess the impact of different farming systems (organic and conventional) on human health. Two standardised functional units, i.e., the unit based on product weight and product energy value were considered for each group of products. Our findings showed significant differences in results when different functional units were used. Additionally, no conclusion could be drawn regarding which farming system is more sustainable. Therefore, it is essential that the regulator clearly defines the criteria for selecting the appropriate functional unit in LCA within the agriculture and food-production sectors. In the absence of these criteria, results should be presented for all alternatives. Although not required by EU regulation, the authors suggest that companies should nevertheless disclose information regarding the environmental impact of agriculture and food production on human health, as this is important for consumers.
Keywords: sustainable food production, environmental concerns, life cycle assessment, human health, responsible consumption
Published in DKUM: 24.09.2025; Views: 0; Downloads: 9
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4. How multicriteria environmental assessment alters sustainability rankings : case study of hempcrete and prefabricated wallsTinkara Ošlovnik, Matjaž Denac, 2025, original scientific article Abstract: The construction sector emphasises circular economy principles that prioritise eco-design strategies, particularly the usage of secondary raw materials. The growing interest in using industrial hemp as a sustainable building material in the construction sector is driven by its versatility. Industrial hemp has been preferential in comparison to other traditional building materials due to its lower global warming impact. Claims regarding the environmental benefits of hemp-containing construction materials based on the single impact category could be misleading; therefore, life cycle assessment (LCA) studies including multiple environmental indicators should be implemented. This study aims to compare two alternative wall designs regarding their environmental impacts. The comparative LCA study for hempcrete and prefabricated walls used in residential buildings was assessed using IPCC and ReCiPe life cycle impact assessment methods. The study highlighted a significant discrepancy depending on the number of environmental indicators considered, as well as between characterised and weighted LCA results. A hempcrete wall was recognised as a slightly (13.63%) better alternative when assessed by the single-issue IPCC method, while its total burden assessed by the ReCiPe method was recognised to be significantly (2.78 times) higher. Based on the results from this case study, regulators could re-evaluate the appropriateness of reporting LCA results solely on the midpoint level, particularly when limited to a single impact indicator, while producers in the construction sector should recognise the threat of greenwashing when reporting using a single impact indicator only.
Keywords: sustainable materials, lifecycle assessment, hempcrete, prefabrication, case study
Published in DKUM: 24.09.2025; Views: 0; Downloads: 8
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5. Method review for assessing damage to human health in LCA : implementation in the production of selected food productsMatjaž Denac, Tinkara Ošlovnik, 2025, original scientific article Abstract: Agriculture and food production can cause a variety of adverse environmental impacts. Life Cycle Assessment (LCA) is the only standardised method so far that provides a comprehensive assessment of the environmental burden of products. LCA results can be expressed as environmental impacts (midpoint level) or environmental damage (endpoint level). Communication on environmental impact is mostly carried out as a part of the Carbon Footprint (CF) or Environmental Product Declaration (EPD), while reporting on environmental damage is rarely used. Due to the growing interest of consumers in ‘healthy’ food, it is important that food producers address the environmental damage. Therefore, an overview of existing Life Cycle Impact Assessment (LCIA) methods that provide insight into endpoint indicators describing damage to human health has been performed and presented in this paper. The application of the selected LCIA methods is demonstrated for the case of food products, highlighting the fact that the results obtained by different LCIA methods are not directly comparable due to a variety of methodological limitations, such as the existence of different environmental indicators and their structure. Finally, the usage of the LCA method for designing food products is presented, with the aim of enabling consumers to choose diets with lower environment and human health impacts.
Keywords: sustainable food consumption, eco-conscious choices, life cycle assessment, environmental impact, human health
Published in DKUM: 23.09.2025; Views: 0; Downloads: 4
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6. A study of key factors for energy policy modellingMatevž Obrecht, Matjaž Denac, 2012, original scientific article Abstract: Environmental problems and high fossil fuel import dependency are core energy problems facing the EU, which has therefore committed itself to increasing its share of renewable energy sources (RES) to 20% by 2020. The implementation of planned measures is usually the most challenging issue in such a situation; therefore, energy models addressing this issue were studied. Because their specificity means that their usability is limited, we developed a more general model focused on the implementation of the planned measures for the development of a more sustainable energy policy with a higher share of RES. The key factors for modelling this transition were identified and examined, and a comparative analysis of Slovenian, EU, and global energy statistics and analyzed energy mix were carried out. In addition, RES potentials were evaluated, future energy demand was forecast, and compatibility of RES potentials and future energy demand was tested. Based on the results, two energy modelling approaches were developed.
Published in DKUM: 05.09.2025; Views: 0; Downloads: 2
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7. Okoljska presoja z LCAMatjaž Denac, 2025, independent scientific component part or a chapter in a monograph Abstract: Vsako dejavnost je mogoče povezati z vplivi na okolje. Za načrtovanje učinkovitih ukrepov zmanjševanja vplivov na okolje pa je potrebno le-te predhodno ovrednotiti. Presoja okoljskih vplivov (LCA) je do danes edina standardizirana in najbolj celovita metoda za presojo vplivov na okolje. Slovenska podjetja metode LCA ne uporabljajo v takem obsegu kot njihovi tekmeci v tujini, zato tudi ne morejo izkoristiti prednosti, ki jih LCA ponuja. LCA analiza je delo za inženirje in ga lahko izvajajo le usposobljeni strokovnjaki s širokim poznavanjem materialov, tehnologij, energetike, z ustrezno programsko opremo in dostopom do baz podatkov. Kljub temu pa LCA analize ni mogoče izvesti brez podatkov naročnika in komunikacije namena uporabe rezultatov. Tako je namen tega gradiva razumevanje, kaj LCA sploh je, kako naj se LCA projekt zastavi, da lahko izvajalci pripravijo ustrezno ponudbo za izvedbo storitve presoje vplivov na okolje z metodo LCA in kasneje presojo tudi izvedejo. V izogib napačnim pričakovanjem potencialnih naročnikov bodo prikazani nekateri primeri rezultatov izvedenih LCA študij. Bralec bo tako spoznal, katere podatke in v kakšni obliki mora naročnik pripraviti, in kako bodo le-ti uporabljeni. Podane vsebine bodo koristne za vse, ki se bodo srečevali s potrebo po vrednotenju vplivov na okolje in dokazovanjem okoljsko odgovornega delovanja.
Keywords: presoja vplivov na okolje, LCA, okoljski življenjski cikel, okoljski podatki, okoljski kazalniki
Published in DKUM: 03.09.2025; Views: 0; Downloads: 14
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8. Možnosti uporabe konoplje kot trajnostnega materiala na primeru gradbeništvaDenis Monetti, 2024, undergraduate thesis Abstract: V diplomskem delu je predstavljena analiza uporabe industrijske konoplje kot trajnostnega gradbenega materiala. Cilj naloge je bil raziskati potencial konoplje v gradbeništvu, oceniti njene okoljske in ekonomske učinke ter analizirati njeno konkurenčnost v primerjavi s konvencionalnimi materiali. Poleg tega je bil namen tudi ovrednotiti, kako lahko konoplja prispeva k doseganju trajnostnih ciljev in prehodu v krožno gospodarstvo.
V prvem delu naloge smo predstavili industrijsko konopljo kot rastlino, njene značilnosti in prednosti za uporabo v gradbeništvu. Konoplja je zaradi svoje hitre rasti, nizkih zahtev po pesticidih in izjemne sposobnosti zajemanja ogljikovega dioksida prepoznana, kot eden izmed najperspektivnejših materialov za trajnostno gradnjo. Posebna pozornost je bila namenjena konopljinemu betonu, ki se uporablja kot izolacijski in strukturni material. Njegove lastnosti, kot so dobra toplotna in zvočna izolacija, odpornost na ogenj in plesen, ter nizka gostota, so lastnosti ki vplivajo, da je energetsko učinkovit material, kar pomeni da pripomore k zmanjšanju porabe energije pri njegovi uporabi, ne da bi pri tem ogrožal delovanje ali udobje. Tak material ponuja visoko zmogljivost v kontekstu izolacije, bodisi toplotne bodisi zvočne.
V primerjavi z drugimi zelenimi materiali, kot so slama, les in glina, konoplja izstopa po svoji izjemni vsestranskosti, obnovljivosti in ekoloških prednostih, zlasti pri izboljševanju kakovosti tal, na katerih raste. Kljub tem nedvomnim prednostim pa se sooča z izzivi, kot so zakonodajne omejitve in omejena dostopnost na trgu, kar zavira njeno širšo uporabo. V nadaljevanju smo analizirali primere uporabe konopljinega betona, kjer se je izkazalo, da ta material pomembno prispeva k zmanjšanju okoljskih obremenitev, izboljšanju bivalnega udobja ter podaljšanju življenjske dobe stavb. Kljub spodbudnim rezultatom pa je jasno, da so potrebne nadaljnje raziskave, predvsem na področju dolgotrajne obstojnosti in ekonomske upravičenosti uporabe konopljinega betona.
Sklep naloge potrjuje, da ima industrijska konoplja velik potencial za trajnostni razvoj gradbeništva, vendar je za njeno širšo implementacijo potrebno preseči regulativne ovire in povečati ozaveščenost o njenih prednostih. Konoplja ima edinstveno priložnost, da postane ključni material v prehodu k trajnostni gradnji, vendar bo to mogoče le z nadaljnjimi raziskavami in inovacijami.
Keywords: trajnostni razvoj, krožno gospodarstvo, konoplja, konopljin beton, gradbeništvo
Published in DKUM: 11.10.2024; Views: 0; Downloads: 21
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9. Sodobno projektiranje variantnih rešitev izvedbe zunanjih sten večstanovanjske stavbe : magistrsko deloGal Rednak, 2024, master's thesis Abstract: Magistrsko delo obravnava analizo skupnih vplivov stroškov, časa izvedbe in okoljskih dejavnikov pri izbiri ustrezne sestave konstrukcijskega sklopa zunanjih sten večstanovanjskega objekta. V okviru raziskave so bile analizirane in primerjane različne izvedbene variante konstrukcijskih sklopov zunanjih sten, pri čemer so bile uporabljene programske opreme Archicad, Bexel Manager in eco2soft. Izvedene analize so nam omogočile izbiro najbolj primerne variante glede na stroškovne, časovne in okoljske vidike.
Analiza je bila osredotočena na ključe segmente, ki so se nanašali na posamezne vplive. Pri stroškovni učinkovitosti so bile oblikovane glavne analize cen, na podlagi katerih so bile analizirane variante konstrukcijskih sklopov z vidika stroškov izvedbe ter časa izvedbe. Poleg stroškovnega in časovnega vidika pa je bila izvedena implementacija analize vplivov na okolje, skladno z veljavnimi ISO in EN standardi, ki je vključevala oceno življenjskega cikla konstrukcijskih sklopov in materialov.
Pomemben poudarek magistrskega dela je na implementaciji BIM pristopa, ki omogoča večdimenzionalno modeliranje in optimizacijo gradbenih projektov. Z izdelavo 3D, 4D in 5D BIM modelov je bilo mogoče podrobno analizirati ne le stroškovne in časovne vidike, temveč tudi preveriti potencialne konflikte med gradbenimi elementi ter izboljšati celovitost in učinkovitost projektiranja. Implementacija BIM pristopa je tako bistveno pripomogla k natančnosti ocene stroškovne in časovne simulacije projekta.
Keywords: Gradbeništvo, Digitalizacija, BIM pristop, Trajnostna gradnja
Published in DKUM: 11.10.2024; Views: 0; Downloads: 44
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10. Integrating social dimensions into future sustainable energy supply networksMatevž Obrecht, Yigit Kazancoglu, Matjaž Denac, 2020, original scientific article Abstract: Environmental protection and sustainable development have become an inevitable trend in many areas, including the energy industry. The development of energy supply networks is strongly correlated with the economics of energy sources as well as ecological and socio-political issues. However, the energy supply network is often distant from the social perspective. This paper therefore combines examination of perceptions and awareness of general public (web-based questionnaire) and top energy experts (a Delphi survey) on the energy supply network and identifies their potential integration in energy supply decision making processes. The results showed that public should be better informed as well as integrated into designing energy supply network as the prosumers gain power and the energy suppliers will no longer dominate the market. Public actors are ready to shape sustainable energy supply and also willing to pay 5.8% more for a sustainable energy supply. The majority are prepared to invest in renewable energy supply network close to their place of residence. Another result is that the public is calling for a shift in priority towards more sustainable and socially friendlier energy supply rather than focusing mainly on the economic and technical perspectives.
Keywords: energy supply, supply networks, sustainable energy, public perception, social integration, supply chain management
Published in DKUM: 19.02.2024; Views: 306; Downloads: 30
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