121. Insights into aquifer and borehole thermal energy storage systems for Slovenia’s energy transitionKarlo Borko, Mihael Brenčič, Zdenko Savšek, Jure Knez, Aleš Vozelj, Gregor Kisel, Nina Rman, 2025, original scientific article Abstract: Since the heating and cooling sectors consume most of the energy in Europe through fossil fuels, the transition to a low-carbon and sustainable energy system is crucial. Underground Thermal Energy Storage (UTES) systems, such as aquifer thermal energy storage (ATES) and borehole thermal energy storage (BTES), offer promising solutions by enabling seasonal storage of renewable thermal energy, balancing the mismatch between supply and demand. ATES and BTES systems store excess heat or cold for later use, making them suitable for large-scale applications like residual heat storage from industrial or power generation processes by offering flexibility in heating and cooling. This review explores the geological and hydrogeological requirements for ATES and BTES systems, pointing out the importance of basic geological knowledge, laboratory and field investigations, and operational monitoring to optimize their performance. The study highlights the need for Slovenia to use the experiences of other European nations to overcome initial challenges, develop effective site evaluation methods, and integrate these systems into existing energy infrastructure.
Keywords: underground thermal energy storage, seasonal heat storage, pilot BTES site, geothermal parameters, Slovenia
Published in DiRROS: 21.02.2025; Views: 1183; Downloads: 1565
 Full text (10,23 MB) |
122. Investigation on microstructural and geometrical characterization of cold metal transfer hardfaced Inconel 718 on medium carbon steelP. Keerthivasan, S. M. Sivagami, T. Raja Vijay, N. Annamalai, 2025, original scientific article Keywords: cold metal transfer (CMT), Inconel 718, hardfacing, process parameters, bead geometry
Published in DiRROS: 21.02.2025; Views: 96; Downloads: 60
Full text (9,86 MB)
This document has many files! More... |
123. Research on pavement performance of waterborne epoxy resin-modified emulsified asphalt binders and pothole repair materialsFan Yang, Liming Yang, Qian Zhou, Qiang Chen, Shiguang Tang, Lihong He, 2025, original scientific article Keywords: waterborne epoxy resin, emulsified asphalt, binders, mixtures, pothole repair materials
Published in DiRROS: 21.02.2025; Views: 105; Downloads: 67
Full text (1,67 MB)
This document has many files! More... |
124. Optimization of welding parameters of electrical resistance spot welded 6082-7075 aluminium joints using the Taguchi methodŞafak Işik, Serkan Apay, Yildiz Yarali Özbek, Zafer Barlas, Ugur Ozsarac, Salim Aslanlar, 2025, original scientific article Keywords: resistance spot welding, aluminium, Taguchi method
Published in DiRROS: 21.02.2025; Views: 87; Downloads: 43
Full text (3,83 MB)
This document has many files! More... |
125. Assessment of wear and corrosion resistance in TiC and WC coatings applied to AISI 1040 forged steel via electrospark depositionDuraisamy Revathi Ponnusamy Rajarathnam, K. Sundaramurthy, M. Makesh, R. Meiyazhagan, 2025, original scientific article Keywords: electrospark deposition, ceramics, forged, hardness, metallic material, resistance, corrosion, coatings
Published in DiRROS: 21.02.2025; Views: 83; Downloads: 46
Full text (2,35 MB)
This document has many files! More... |
126. Understanding the geochemical composition of alluvial sediments in a complex environmental system – A case study of the Mura/Mur riverBarbara Čeplak, Ulrike Moser, Johanna Irrgeher, Martin Šala, Polona Kralj, Gorazd Žibret, 2025, original scientific article Abstract: The study provides a comprehensive investigation of the geochemical properties of stream and alluvial sediments in an area characterised by a complex natural (geochemical) and anthropogenic environment of the transboundary Mura River (Austria, Slovenia, EU). A total of 65 sediment samples from active river channel and tributaries, and 59 samples from 6 floodplain sediment profiles were collected and analysed. ICP–MS analysis was used to determine the levels of 59 elements in two fractions (<0.063 and 0.063–0.125 mm). Natural (geological) and anthropogenic factors influencing the elemental composition were determined. The sediments showed a low degree of weathering in the upper part of the river and a moderate degree in the middle and lower parts. They are enriched with As, Co, Cr, Cu, Mo, Ni, and Sb compared to the median values for the European stream and floodplain sediments. This can be a consequence of the presence of natural ore mineralisation in Upper Styria along with related lithological features. Factor analysis revealed four natural geochemical associations (K–Ba–Rb–Ga–Li–Tl–Cs–Be–Al–Cu–V; Th–YREE–U; Zr–Hf–Nb; Na–Sr), one anthropogenic association (Cd–In–Zn–Pb) and two combined (geogenic and anthropogenic) associations (Ni–Cr–Mg–Co–V and Fe–Sc–Ti–Nb). Particle analysis by SEM/EDS was used to identify characteristic carriers of specific elements and potentially to determine their sources.
Keywords: factor analysis, river sediments, CIA, PIA, ICV, geochemistry, particle characterization
Published in DiRROS: 21.02.2025; Views: 107; Downloads: 32
Full text (10,02 MB) |
127. |
128. Optimizing weld quality in dissimilar stainless steel joints for industrial applicationsD. Selvamuthukumaran, V. C. Uvaraja, 2025, original scientific article Keywords: dissimilar stainless steel, cold metal transfer (CMT) welding, Taguchi L9 optimization, TOPSIS, ultimate tensile strength (UTS), microhardness (HV0.5), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXS)
Published in DiRROS: 21.02.2025; Views: 86; Downloads: 40
Full text (4,64 MB)
This document has many files! More... |
129. Influence of microalloying and the thermomechanical method of processing on the comminution of the copper structureMilijana Mitrović, Biserka Trumić, Saša Marjanović, Mirjana Šteharnik, Vesna Krstić, 2025, original scientific article Keywords: Cu-Fe-P, microalloying, plastic processing, mechanical and structural characteristics
Published in DiRROS: 21.02.2025; Views: 72; Downloads: 44
Full text (7,82 MB)
This document has many files! More... |
130. |
