Exhaust gas recirculation in dual-fuel engine

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Kaario, Ossi
dc.contributor.author Calvo Oliveira, Alejandro
dc.date.accessioned 2016-06-17T12:25:46Z
dc.date.available 2016-06-17T12:25:46Z
dc.date.issued 2016-06-13
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/20857
dc.description.abstract The efforts made during this thesis were pointed towards analyze and comprehend the effect promoted by exhaust gas recirculation systems within dual-fuel operation engines. The main outcomes of the study embrace the positive impact found in dual-fuel engines brought by low EGR rates regarding both thermal efficiency and exhaust emissions, as well as the effect promoted by changes of the methane share with respect the total amount of energy supplied. The increase up to 50% of the diesel substitution rate leads to greater thermal characteristics, achieving higher cylinder pressure and cumulative heat release. Nevertheless, further increases of the methane share may produce significant reductions of the energy released associated to a poor combustion quality, as well as increase the likelihood of the onset of knocking. The exhaust gas recirculation is mainly characterized by reductions of the oxygen content present within the intake mass flow. It is demonstrated how EGR rates below 15% bring notorious reductions of NOx without significantly compromising the thermal efficiency. Notwithstanding, when present to a large degree, the EGR may lead to erratic engine operation and, taken to the extreme, misfiring. en
dc.format.extent 69+7
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Exhaust gas recirculation in dual-fuel engine en
dc.type G2 Pro gradu, diplomityö fi
dc.contributor.school Insinööritieteiden korkeakoulu fi
dc.subject.keyword exhaust gas recirculation en
dc.subject.keyword dual-fuel en
dc.subject.keyword diesel substitution rate en
dc.subject.keyword NOx reduction en
dc.identifier.urn URN:NBN:fi:aalto-201606172465
dc.programme.major Mechanical Engineering fi
dc.programme.mcode IA3027 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Larmi, Martti
dc.programme Konetekniikan koulutusohjelma fi


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