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Comparative life cycle GHG emission analysis of conventional and electric vehicles in India

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Abstract

The propulsion systems and characteristics of electric vehicles (EV) are different from that of conventional internal combustion engine vehicles (ICEV) and are considered to be environmentally friendly. It is relevant to access their greenhouse gas (GHG) emissions on a life cycle perspective for a specific location. In this study, the life cycle GHG emissions of electric vehicles in terms of equivalent carbon emission (kgCO2eq) are compared with conventional vehicles for a life cycle inventory in Indian conditions. It has been concluded that there is a reduction of about 40% embodied equivalent carbon in an ICEV in comparison with an EV in Indian conditions. Vehicle emission factor has been introduced to normalize the emission value with respect to the vehicle life in km. It varies as 0.27 kgCO2eq/km and 0.24 kgCO2eq/km for an ICEV, with high value for the petrol variant. Similar values for EVs are 0.37 kgCO2eq/km, 0.34 kgCO2eq/km and 0.32 kgCO2eq/km, with highest value for LFP and the least for LMO variants. The study concludes that the high value of emission parameters for EVs in comparison with ICEVs is due to the high rated battery component, emission factor due to the Indian generation mix and energy intensive manufacturing techniques. The emission footprint of EVs can be reduced by improved material production and manufacturing techniques of the vehicle components, increased penetration of renewable in the generation sector and enhanced usage of recycled components in vehicle industry.

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Abbreviations

ICEV:

Internal combustion engine vehicle

EV:

Electric vehicle

LAB:

Valve regulated lead acid battery

ULAB:

Used lead acid batteries

NMC:

Lithium nickel manganese cobalt oxide batteries

LFP:

Lithium iron phosphate batteries

LMO:

Lithium manganese oxide batteries

REmap:

Renewable energy roadmap

IRENA:

International Renewable Energy Agency

MnTPA:

Million tonnes per annum

LMV:

Light motor vehicle

LCV:

Light commercial vehicle

NEDC:

New European Driving Cycle

MIDC:

Modified Indian Driving Cycle

CSTEP:

Centre for Study of Science, Technology and Policy

ctg:

Cradle to grave

wtw:

Well to wheel

ctgt:

Cradle to gate

PbO:

Lead oxide

kgCO2eq :

Equivalent carbon emission (kg)

i :

Component

j :

Material

\({\text{CE}}_{{{\text{eq}}({\text{mp}},i)}}\) :

Material production carbon emission for component i (kgCO2eq)

\({\text{CE}}_{{{\text{eq}},j}}\) :

Carbon emission of material j (kgCO2eq)

\(m_{j}\) :

Mass of material j in component i (kg)

L :

Distance to be transported (km)

m :

Mass to be transported (kg)

c :

Transportation GHG emission (kgCO2eq/kg-km or kgCO2eq/ton-km)

\({\text{CE}}_{{\text{eq(ctg)}}}\) :

Cradle to grave life cycle GHG emission (kgCO2eq)

EOL:

End of life

\({\text{CE}}_{{{\text{eq}}({\text{mnf}},i)}}\) :

Manufacturing GHG emission for component i (kgCO2eq)

\({\text{CE}}_{{{\text{eq}}({\text{tr}},i)}}\) :

Transportation GHG emission for component i (kgCO2eq)

\({\text{CE}}_{{{\text{eq}}({\text{A}})}}\) :

Assembly phase GHG emission (kgCO2eq)

\({\text{CE}}_{{{\text{eq}}({\text{D}})}}\) :

Driving phase GHG emission (kgCO2eq)

\({\text{CE}}_{{\text{eq(VR)}}}\) :

Vehicle recycling phase GHG emission (kgCO2eq)

\({\text{CE}}_{{{\text{eq(rec)}},i}}\) :

Recycling GHG emission for component i (kgCO2eq)

\({\text{CE}}_{{\text{eq(ctgt)}}}\) :

Total cradle to gate GHG emission (kgCO2eq)

\({\text{CE}}_{{\text{eq(wtw)}}}\) :

Total well to wheel GHG emission (kgCO2eq)

\({\text{CE}}_{{\text{eq(eol)}}}\) :

Total end of life GHG emission (kgCO2eq)

\({\text{ICEV}}\_{\text{CE}}_{{\text{eq(wtw)}}}\) :

Well to wheel GHG emission of ICEV (gCO2eq/km)

\({\text{ICEV}}\_{\text{CE}}_{{\text{eq(wtT)}}}\) :

Well to tank GHG emission of ICEV (gCO2eq/L)

\({\text{ICEV}}\_{\text{CE}}_{{\text{eq(Ttw)}}}\) :

Tank to wheel GHG emission of ICEV (gCO2eq/L)

FE:

Fuel efficiency of an ICEV (L/km)

\({\text{EV}}\_{\text{CE}}_{{\text{eq(wtw)}}}\) :

Well to wheel GHG emission of an EV (gCO2eq/km)

\({\text{EV}}\_{\text{CE}}_{{\text{eq(wtp)}}}\) :

Well to power plant GHG emission of an EV (gCO2eq/kWh)

\({\text{EV}}\_{\text{CE}}_{{\text{eq(ptw)}}}\) :

Power plant to wheel GHG emission of an EV (gCO2eq/kWh)

\({\text{CE}}_{{\text{eq(tot)}}}\) :

Total life cycle GHG emission (kgCO2eq)

\(G_{e}\) :

Ratio of power source e in electricity mix

EE:

Electric efficiency of an EV (kWh/km)

VEF:

Vehicle emission factor (kgCO2eq/km)

n :

Vehicle life (km

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Correspondence to Jani Das.

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Das, J. Comparative life cycle GHG emission analysis of conventional and electric vehicles in India. Environ Dev Sustain 24, 13294–13333 (2022). https://doi.org/10.1007/s10668-021-01990-0

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  • DOI: https://doi.org/10.1007/s10668-021-01990-0

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