20.500.12556/RUL-110171 Izboljšanje prenosa toplote pri vrenju s strukturiranimi grafenskimi prevlekami Improving the heat transfer during boiling with structured graphene coatings V delu obravnavamo izboljšanje prenosa toplote pri vrenju na strukturiranih grafenskih nanosih. Iz pregledane literature smo ugotovili, da raziskovalni interesi za uporabo grafenskih slojev in grafenskih disperzij pri študiju vrenja narašča eksponentno. Pri uporabi grafenskih nanosov se kritična gostota toplotnega toka v primerjavi z golo površino poveča tudi za več kot 150%. Povečanje je odvisno od debeline grafenskega nanosa ali koncentracije grafenove disperzije. Zasnovali smo novo merilno progo za izvajanje eksperimentov vrenja pri povišanih tlakih na podlagi delovanja dušika v vrelni komori. Eksperimentalnih rezultatov vrenja na grafenskih nanosih pri povišanih tlakih do danes namreč še ni zaslediti. V sklopu tega smo že izbrali in dobavili ustrezne grafenske nanose, ki bodo omogočali izvedbo meritev mehurčkastega vrenja. The paper deals with the improvement of heat transfer during boiling on structured graphene deposits. From the reviewed literature, we found that research interests in the use of graphene layers and graphene dispersions in fermentation studies are increasing exponentially. When using graphene coatings, the critical heat flux density is also increased by more than 150% compared to the bare surface. The increase depends on the thickness of the graphene coating or the concentration of graphene dispersion. We have designed a new measuring line for conducting boiling experiments at elevated pressures based on the action of nitrogen in the boiling chamber. The experimental results of boiling on graphene deposits at elevated pressures have not yet been observed. As part of this, we have already selected and delivered the appropriate graphene deposits, which will allow measurements of bubble boiling. vrenje grafen prenos toplote strukturirane prevleke kritična gostota toplotni tok boiling graphene heat transfer structured coatings critical heat flux true false false [M. Hohkraut] Slovenski jezik Angleški jezik Zaključna naloga 2019-09-12 12:02:52 2019-09-12 12:02:54 2022-08-22 03:42:08 0000-00-00 00:00:00 2019 0 Ljubljana 0 XII, 33 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536.24:620.1(043.2) 216782 16923931 4407.pdf 4407.pdf 1 8A361CBDB266F96C4A5B0B11288D085E 2078ad7cf7efb162c256e260f95e7212ed32e7eb6a272fe0e4233cb96b48edd2 0e85cc32-a1b7-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=121814 Fakulteta za strojništvo 0 0 0