20.500.12556/RUL-186779 Simulacija termodinamičnega procesa gorenja zmesi vodika in metana v zaprtem prostoru Simulation of thermodynamic process of combustion of a hydrogen and methane mixture in a closed room Uporaba vodika in metana kot alternativnih virov energije prinaša nove varnostne izzive, zlasti pri shranjevanju v zaprtih prostorih. Pri uhajanju plina pod visokim tlakom skozi majhne odprtine lahko nastane vnetljiva zmes in pride do kopičenja plina pod stropom. S programom Fire Dynamics Simulator je bilo modelirano uhajanje vodika in metana iz polne industrijske jeklenke v prostor velikosti 8 x 6 x 3 m. Največje koncentracije gorljivih plinov so bile ugotovljene pod stropom, kjer je bila ob ustaljenih razmerah povprečna koncentracija približno 14 % metana, 10 % vodika in 16 % kisika. Območje vnetljivosti zmesi je bilo določeno z Le Chatelierjevim pravilom in je po višini segalo približno od 1,2 do 2,4 m. Model je bil nato nadgrajen z virom vžiga, s čimer je bila analizirana dinamika zgorevanja. Najvišja temperatura v prostoru je znašala 1911 °C, največja hitrost sproščanja toplote pa 13,5 MW po 7,8 s od vžiga. Med zgorevanjem se je sprostilo približno 193 MJ energije, kar predstavlja približno 45 % teoretično razpoložljive energije gorivne zmesi. Hydrogen and methane as alternative energy sources introduce new safety challenges, particularly when they are stored in enclosed spaces. In the event of high-pressure gas leakage through small openings, a flammable mixture may form and gas may accumulate beneath the ceiling. The leakage of hydrogen and methane from a full industrial gas cylinder into an 8 x 6 x 3 m enclosure was modelled using the Fire Dynamics Simulator. The highest concentrations of combustible gases were observed near the ceiling, where, under quasi-steady conditions, the average concentrations were approximately 14% methane, 10% hydrogen and 16% oxygen. The flammability zone of the mixture was determined using Le Chatelier’s rule and extended approximately from 1.2 to 2.4 m above the floor. The model was then supplemented with an ignition source to analyse the combustion dynamics. The maximum temperature in the enclosure reached 1911 °C, while the peak heat release rate was 13.5 MW, occurring 7.8 s after ignition. During combustion, approximately 193 MJ of energy was released, corresponding to about 45% of the theoretically available energy of the fuel mixture. simulacija uhajanje plina vodik metan eksplozija požar simulation gas leakage hydrogen methane explosion fire true false false [E. Petrov] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-09-05 08:31:05 2026-09-05 08:31:19 2026-09-08 10:54:46 0000-00-00 00:00:00 2026 0 Ljubljana 0 XI, 51 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 547.211:004.942:519.876.5(043.2) 289373 290343939 49427.pdf 49427.pdf 1 0CDF9A3F6FB6EF5615778C09F7CDDBD7 5d50cdb1fb701c2a38e6359db1c409bebf85d6ebd7de8d6ec4c92afee58b7d6d 665ef47a-a8f3-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=246150 Fakulteta za strojništvo 0 0 0