{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-92S8YZKC/9a65dde3-1cda-46c5-83b2-1f2774863803/HTML","dcterms:extent":"16 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-92S8YZKC/2daffef2-f406-4b82-820a-c155d9fab5ad/PDF","dcterms:extent":"635 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-92S8YZKC/83c2ef03-d72b-4af9-abb5-a2cfbffa68bd/TEXT","dcterms:extent":"13 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-92S8YZKC","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2013","dc:creator":["Filetin, Tomislav","Landek, Darko","Župan, Josip"],"dc:format":[{"@xml:lang":"sl","#text":"številka:1"},{"@xml:lang":"sl","#text":"letnik:47"},{"@xml:lang":"sl","#text":"str. 125-127"}],"dc:identifier":["ISSN:1580-2949","COBISSID:962474","URN:URN:NBN:SI:doc-92S8YZKC"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"en","#text":"agitation"},{"@xml:lang":"sl","#text":"kaljenje"},{"@xml:lang":"sl","#text":"mešanje"},{"@xml:lang":"sl","#text":"nanodelci"},{"@xml:lang":"en","#text":"nanofluids"},{"@xml:lang":"en","#text":"nanoparticles"},{"@xml:lang":"sl","#text":"nanotekočine"},{"@xml:lang":"en","#text":"quenching"},{"@xml:lang":"sl","#text":"titanov dioksid"},{"@rdf:resource":"http://www.wikidata.org/entity/Q871335"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Investigation of the cooling process with nanofluids according to ISO 9950 and ASTM D 6482 standards| Preiskava postopka ohlajanja v nanotekočini po standarih ISO 9950 in ASTM 6482|"},"dc:description":[{"@xml:lang":"sl","#text":"Introducing nanofluids as liquid quenchants in order to improve the heat-transfer characteristics is a novel approach in heat treatment. These new liquid quenchants are called nanoquenchants and are colloid suspensions of nanoparticles in the base fluid (BF). For the purpose of this research standard liquid quenchants, such as water and polymer solution, were used as base fluids. Nanoparticles were added to the base fluid in order to increase its thermal properties without a significant effect on the viscosity of the fluid. The added nanoparticles cause an enhancement of the heat-transfer characteristics of the liquid quenchants. In this research TiOsub2 nanoparticles, with the average size of 50 nm, were added to the base fluid. The cooling curves for every tested quenchant were recorded using the IVF SmartQuench system and the quenching process parameters were determined and compared. The tested quenchants were deionised water and polyalkylene-glycol (PAG) water solutions of (5, 10 and 20) % in volume fractions of polymer concentrations. Quenching experiments were first conducted in pure BFs without the addition of nanoparticles and without agitation according to the ISO 9950 standard. The experiments were then repeated with an addition of 0.2 g/l TiOsub2 nanoparticles. The second series of experiments was conducted in a quenching bath with agitation according to the ASTM D 6482 standard. All of the recorded cooling curves were compared and the effects of the nanoparticle addition and agitation were investigated. The addition of the nanoparticles and quenching with agitation caused an increase in the maximum cooling rate and a shorter full-film stage"},{"@xml:lang":"sl","#text":"Uvajanje nanotekočin za kaljenje za izboljšanje lastnosti prenosa toplote je nov način toplotne obdelave. Te nove tekočine za kaljenje se imenujejo nanokalilne tekočine, ki so koloidna suspenzija nanodelcev v osnovni tekočini (BF). Za preiskavo je bila kot standardna tekočina za kaljenje uporabljena mešanica vode in raztopine polimera. Nanodelci so bili dodani osnovni tekočini za povečanje termičnih lastnosti brez velikega učinka na viskoznost tekočine. Dodani nanodelci so povečali toplotno prevodnost tekočine za kaljenje. V tej raziskavi so bili dodani osnovni tekočini nanodelci TiOspodaj2 povprečne velikosti 50 nm. Krivulje ohlajanja za vsako preizkušeno kalilno tekočino so bile posnete s sistemom IVF SmartQuench in procesni parametri kaljenja so bili določeni in primerjani. Preizkušene kalilne tekočine so bile deionizirana voda, vodna raztopina polialkilen glikola (PAG) z volumenskim deležem (5, 10 in 20) % polimera. Preizkusi kaljenja so bili najprej izvršeni v osnovni tekočini (BF) brez dodatka nanodelcev in brez premešavanja, skladno s standardom ISO 9950. Eksperimenti so bili nato ponovljeni z dodatkom nanodelecev 0,2 g/l TiOspodaj2. Druga serija preizkusov je bila izvršena v kalilni kopeli s premešavanjem, kot določa standard ASTM D 6482. Vse posnete krivulje so bile primerjane in preiskovan je bil tudi učinek dodatka nanodelcev in premešavanja. Dodatek nanodelcev in kaljenje s premešavanjem sta povzročila povečanje maksimalne hitrosti hlajenja in krajše stanje popolnega prekritja s paro"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-92S8YZKC","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-92S8YZKC"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-92S8YZKC/2daffef2-f406-4b82-820a-c155d9fab5ad/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-92S8YZKC/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-92S8YZKC"}}}}