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Emission factors for methane engines on vehicles and ships: with a focus on methane emissions
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
Executive, Forskningsinstitut, IVL Swedish Environmental Research Institute.
Responsible organisation
2020 (English)Report (Other academic)
Abstract [en]

This report covers emissions from methane engines on road vehicles and ships, and aims at presenting relevant emission factors for different engines and vehicle types and ships. A focus is placed on methane emissions, and both engine emissions and non-engine emissions are included. Methane fuel passes through the engine to varying degrees in different engine types causing a main part of the methane emissions from methane fueled road vehicles and ships.

As introduction to the emission calculations we describe the use of different types of methane fuel, the use of different engine types, and typical properties of vehicles/vessels with different types of methane engines. The report presents emission factors for heavy duty vehicles in the categories “Heavy Goods Vehicle” (HGV) and “Bus”, emission factors for light duty vehicles are presented for the categories “Passenger car” and “Light Commercial Vehicle” (LCV), while emission factors for ships do not contain any subcategories.

There is generally a shortage of measurement data that cause high uncertainties for many emissions factors.

Emission factors for 2019 are summarized in the report. Different regulations apply which a.o. cause the large difference seen for some emissions between land-based vehicles and ships.

Abstract [sv]

Den här rapporten beskriver emissioner från metanmotorer på vägfordon och fartyg. Syftet är att ta fram relevanta emissionsfaktorer för olika motortyper och fordonstyper, alternativt fartyg. Fokuset är att presentera emissionsfaktorer för metanutsläpp och uppskattningarna omfattar både emissioner från motorer och från bränslesystemen ombord. Metan passerar genom motorerna i olika grad beroende på förbränningsteknik vilket utgör den främsta källan till metanutsläpp från metandrivna land- och sjötransporter.

Som en bakgrund till emissionsberäkningarna beskriver vi de olika typerna av metanbränsle, de olika motortyperna, och hur kombinationer av dessa används på fordonstyper respektive fartyg. De transportslag som ingår är ”Heavy duty vehicles” där emissionsfaktorer presenteras för kategorierna ”Heavy Goods Vehicles” (HGV, tunga lastbilar) och ”Bus” (bussar), “Light duty vehicles” med emissionsfaktorer för kategorierna ”Passenger car” och "Light Commercial Vehicle” (passagerarbilar och lätta kommersiella fordon), och “Ships” (fartyg).

Endast få emissionsmätningar finns tillgängliga vilket gör att många av de emissionsfaktorer som vi presenterar bedöms ha stor osäkerhet.

Emissionsfaktorer för 2019 summeras i rapporten. En viktig anledning till skillnaderna i emissionsfaktorer mellan olika landbaserade fordonsslag och fartyg är att utsläppsregleringarna skiljer sig mycket åt.

Place, publisher, year, edition, pages
2020. , p. 50
Series
SMED Rapport, ISSN 1653-8102 ; 2020:8
Keywords [en]
natural gas, LNG, CNG, methane, emission factors, trucks, buses, ships
National Category
Environmental Sciences
Research subject
SMED (Svenska MiljöEmissionsData), Air and climate
Identifiers
URN: urn:nbn:se:naturvardsverket:diva-9019OAI: oai:DiVA.org:naturvardsverket-9019DiVA, id: diva2:1601009
Available from: 2021-10-06 Created: 2021-10-06 Last updated: 2023-11-24Bibliographically approved

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IVL Swedish Environmental Research Institute
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CiteExportLink to record
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