prikaz prve stranice dokumenta Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions
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doctoral thesis
Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. urn:nbn:hr:235:175414
Sremec, Mario
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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Sremec, M. (2018). Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:175414

Sremec, Mario. "Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:175414

Sremec, Mario. "Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions." Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. https://urn.nsk.hr/urn:nbn:hr:235:175414

Sremec, M. (2018). 'Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions', Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 24 April 2024, https://urn.nsk.hr/urn:nbn:hr:235:175414

Sremec M. Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2018 [cited 2024 April 24] Available at: https://urn.nsk.hr/urn:nbn:hr:235:175414

M. Sremec, "Experimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions", Doctoral thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:235:175414

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Metadata
TitleExperimental investigation of influence of dual-fuel engine operating parameters on combustion, efficiency and exhaust gas emissions
Title (croatian)Eksperimentalno istraživanje utjecaja radnih parametara dvogorivnog motora na način izgaranja, učinkovitost i emisiju štetnih tvari
AuthorMario Sremec
MentorDarko Kozarac (mentor)
Committee memberZoran Lulić (predsjednik povjerenstva)
Committee memberMomir Sjerić (član povjerenstva)
Committee memberVladimir Medica (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2018-12-05, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Universal decimal classification
(UDC)		621.3 - Electrical engineering
Abstract
The strict regulations related to exhaust gas emissions from internal combustion engines in the transport sector, created by governments around the world, forces manufacturers to improve existing combustion techniques, develop new ones and apply alternative, environmentally more acceptable fuels. In this context, natural gas is recognized as an alternative fuel which can be used both in spark ignition and compression ignition engines with a number of benefits. In recent years, special attention has been given to the research of diesel-natural gas dual-fuel combustion, which has potential to reduce greenhouse gas emissions, as well as harmful exhaust gas emissions. Given that this combustion technique is not fully investigated, but can be easily used in existing diesel engines, there is a need for further improvement, which is the main objective of this work. The purpose of the research is to experimentally examine possibilities of using compressed natural gas in conventional dual-fuel internal combustion engine, with goals that include achieving maximum efficiency and maintaining exhaust gas emissions on permitted levels. Special attention was given to the improvement of characteristics at low and high loads, where dual-fuel shows some disadvantages compared to the normal diesel operation. By using the fully flexible fuel injection system and exhaust gas recirculation, there were achieved different combustion techniques including: diffusion flame combustion, premixed flame propagation and premixed chemically controlled combustion of homogeneous or stratified mixture. It is shown that adequate injection strategies in combination with other operating parameters can significantly improve exhaust gas emissions from dual-fuel engine. Finally, recommendations for selecting operating parameters at low and high loads are given.
Abstract (croatian)
Osnovni cilj ove disertacije je istraživanje mogućnosti korištenja prirodnog plina (PP) u dvogorivnom (eng. Dual-fuel) motoru s unutarnjim izgaranjem. Dvogorivni motori su modificirani Dieselovi motori kod kojih se prirodni plin koristi kao glavno gorivo, a njegovo izgaranje se inicira ubrizgavanjem male količine dizelskog goriva. Korištenje PP-a uz dizelsko gorivo pogodno je zbog čišćeg izgaranja, široke dostupnosti te potencijala za smanjenje emisije štetnih tvari u ispušnim plinovima. Glavni cilj istraživanja bio je ispitati ostvarive performanse motora i emisije koje nastaju pri dvogorivnom izgaranju. Prema pregledu literature, takvi motori imaju određenih problema pri niskim i visokim opterećenjima pa je posebna pozornost posvećena istraživanju upravljanja radom u tim radnim područjima. Na postojeći motor eksperimentalnog postava dograđen je potpuno fleksibilan sustav dobave dizelskog goriva koji omogućuje, uz korištenje povrata ispušnih plinova, postizanje različitih tehnika izgaranja koje uključuju: izgaranje difuzijskim plamenom, kombinirano izgaranje difuzijskim i predmješanim turbulentnim plamenom te predmješano kemijski uvjetovano izgaranje homogene ili slojevite smjese. Ostvarenim rezultatima pokazano je da se korištenjem adekvatne strategije ubrizgavanja u kombinaciji s ostalim radnim parametrima može značajno poboljšati izgaranje u dvogorivnom motoru, čime se postižu niže emisije štetnih tvari uz istu ili poboljšanu učinkovitost. Na kraju istraživanja, prikazane su smjernice za izbor radnih parametara na niskom i visokom opterećenju.
Keywords
Keywords (croatian)
Languageenglish
URN:NBNurn:nbn:hr:235:175414
Study programmeTitle: Mechanical Engineering and Naval Architecture
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje tehničkih znanosti (doktor/doktorica znanosti, područje tehničkih znanosti)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
RepositoryRepository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
Created on2020-04-08 17:42:30

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