33 KB173 KB34 KB199920252005Egolf, Peter W.Kitanovski, AndrejPoredoš, AlojzŠarlah, Alenštevilka:110 straniletnik:51str. 3-12ISSN:0039-2480COBISSID:8034843URN:URN:NBN:SI:doc-YQOKK0UWenslAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikbrozga ledenaledlight-emitting diodeporazdelitev temperatureprenos toploteprofili temperaturniprogrami numeričniPrenos toplote v toku ledene brozge| Heat transfer in an ice-slurry flow|An ice slurry is a harmless substance that can be used in various cooling systems because of its good thermal properties. Until recently, systems with ice slurries were limited to food processing, where conventional, harmful refrigerants are not allowed. The rapid development of such systems and the many innovations in refrigeration have paved the way for ice-slurry systems tobe used in other areas, e.g., district cooling. However, a lot of research remains to be done, especially experimental work. This paper deals with the research results from heat transfer in an ice-slurry flow within a rectangular channel. First, the basics of heat transfer in an ice slurry are explained. Next the experiment to determine the intensity of the heat transfer is explained. Later, the results are explained, and together with the results of some other experiments, shown in diagrams for comparison. In the second part of the paper a numerical program is described: this was used to compare numerical and experimental data. Finally, conclusions from the comparison between the experimental and numerical results are given and discussedLedena brozga je do okolja neškodljiva snov, katere uporaba je zaradi njenih dobrih toplotnih lastnosti primerna v mnogih sistemih hlajenja. Do pred nekaj leti so sistemi z ledeno brozgo bili omejeni le na živilsko proizvodnjo, kjer zaradi strupenosti drugih hladiv, uporaba le-teh ni dovoljena. Zaradi hitrega razvoja takšnih sistemov in mnogih inovacij v hladilni tehniki, pa je njihova uporaba mogoča tudi na drugih področjih, na primer daljinsko hlajenje. V ta namen je treba opraviti se veliko raziskav, predvsem eksperimentalnih, saj je analitičen postopek obravnave problema precej zapleten. Prispevek obravnava rezultate raziskave prenosa toplote v toku ledene brozge znotraj pravokotnega kanala. Na začetku je podan opis preizkusne proge in samega preizkusa, s katerim smo določili intenzivnost prenosa toplote. Dobljeni rezultati so v nadaljevanju razlozeni in predstavljeni v diagramih ter primerjani s korelacijami in rezultati meritev drugih avtorjev. Opisan je tudi numerični program, na podlagi katerega je v nadaljevanju narejena primerjava numeričnih in eksperimentalnih rezultatov. Na koncu so narejene se ugotovitve in sklepi raziskaveTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo