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Vpliv zmesi dizelskega goriva in metanola na zgorevanje v motorju na kompresijski vžig : zaključna naloga Razvojno raziskovalnega programa I. stopnje StrojništvoZuljan, Vid, strojnikV nalogi obravnavamo vpliv zmesi dizelskega goriva in metanola na zgorevanje v motorju na kompresijski vžig. Namen dodatka metanola k dizelskemu gorivu je predvsem v zmanjšanju okolju škodljivih ... izpustov, pri čemer je potrebno ohraniti globalne parametre delovanja motorja; to so moč, efektivni izkoristek ter poraba goriva. Za metanol je značilna visoka vsebnost kisika, nizka gostota ter visoka izparilna toplota, za njegovo pridobivanje pa obstaja vrsta postopkov, ki omogočajo izkoriščanje obnovljivih virov energije. V nalogi je na podlagi simulacij v programu AVL Fire ovrednoten vpliv 10%, 20% in 30% masnega deleža metanola pri vbrizganem gorivu. Poleg tega je ovrednoten tudi vpliv kota vbrizga (690%, 707% in 715%) in vpliv deleža recirkuliranih izpušnih plinov (0%, 30% in 70%). Rezultati nakazujejo, da se z večanjem deleža metanola poveča čas zakasnitve vžiga, kar povzroči višjo stopnjo sproščanja toplote ter krajše trajanje zgorevanja. Zaradi zgorevanja pozno po zgornji mrtvi legi se zmanjšajo izpusti NOx, povečajo pa se izpusti saj. Zgodnejši kot vbrizga poveča tlak, temperaturo in stopnjo sproščanja toplote v valju, poznejši kot vbrizga pa povzroča diametralne efekte. Izpusti NOx so višji pri zgodnejšem vbrizgu. Podobno kot metanol, tehnika EGR povečuje zakasnitvene čase in zmanjšuje tlak in temperaturo v valju. Hitrost sproščanja toplote se namreč poveča zaradi daljšega zakasnitvenega časa. Podrobna analiza koncentracij posameznih radikalov dodatno razkriva, da se predvsem radikal OH v največji meri tvori v območju najintenzivnejšega zgorevanja.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [V. Zuljan], 2020Language - slovenianCOBISS.SI-ID - 30778371
Author
Zuljan, Vid, strojnik
Other authors
Seljak, Tine, strojnik
Topics
diplomske naloge |
motor na kompresijski vžig |
metanol |
zgorevanje |
tehnika EGR |
kot vbrizga |
emisije |
thesis |
compression ignition engine |
methanol |
combustion |
injection timing |
emissions
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Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Mechanical Engineering, Ljubljana | Ljubljana | FSLJ |
reading room 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Zuljan, Vid, strojnik | ![]() |
Seljak, Tine, strojnik | 33516 |
Source: Personal bibliographies
and: SICRIS
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