Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results

Juhani Laurikko, Kimmo Erkkilä, Ari-Pekka Pellikka, Jukka Nuottimäki

Research output: Contribution to conferenceConference articleScientificpeer-review

Abstract

Electric vehicles are claimed to be superior in terms of energy efficiency when compared to vehicles propelled by an IC-engine. This is particularly true, if we weigh the gross energy content of the fuel used against the uptake of electricity to charge the batteries. However, a passenger vehicle needs energy also to keep the cabin temperature warm or cold, depending on the season. Especially in winter conditions the cabin heating is a challenge, as an abundance of excess energy as in an ICE car is not available in an EV. Furthermore, considering the amount of energy needed to operate the vehicle is not sufficient, as this vehicle stage is only a part of the complete energy chain that includes also preparation and distribution of the fuel vs. electric power generation and distribution. All these stages need to be assessed to find out the true efficiency, and to be able to estimate potentials for reduction of GHG gases, CO2 in particular. This paper describes assessment of the energy efficiency of two EVs, converted from normal ICE-driven cars using mostly commercially available components. Test programme consisted of various driving cycles, as well as low ambient temperatures. Furthermore, efforts were made to separate the contribution of every sub-system to the overall efficiency. The results indicate that total energy efficiency is heavily dependent on type of driving - urban or highway. In addition, it was noted that low ambient temperature also deteriorates performance and efficiency quite considerably
Original languageEnglish
Publication statusPublished - 2011
MoE publication typeNot Eligible
EventInternational scientific conference on Hybrid and Electric Vehicles, RHEVE 2011 - Rueil-Malmaison, France
Duration: 6 Dec 20117 Dec 2011

Conference

ConferenceInternational scientific conference on Hybrid and Electric Vehicles, RHEVE 2011
Abbreviated titleRHEVE 2011
CountryFrance
CityRueil-Malmaison
Period6/12/117/12/11

Fingerprint

Electric vehicles
Propulsion
Energy efficiency
Railroad cars
Electric power generation
Electric power distribution
Temperature
Electricity
Engines
Heating
Gases

Keywords

  • EV
  • efficiency
  • driving conditions
  • cold ambient temperature

Cite this

Laurikko, J., Erkkilä, K., Pellikka, A-P., & Nuottimäki, J. (2011). Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results. Paper presented at International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, Rueil-Malmaison, France.
Laurikko, Juhani ; Erkkilä, Kimmo ; Pellikka, Ari-Pekka ; Nuottimäki, Jukka. / Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results. Paper presented at International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, Rueil-Malmaison, France.
@conference{76734147ab0a4a4cb1297d7bfa91bd76,
title = "Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results",
abstract = "Electric vehicles are claimed to be superior in terms of energy efficiency when compared to vehicles propelled by an IC-engine. This is particularly true, if we weigh the gross energy content of the fuel used against the uptake of electricity to charge the batteries. However, a passenger vehicle needs energy also to keep the cabin temperature warm or cold, depending on the season. Especially in winter conditions the cabin heating is a challenge, as an abundance of excess energy as in an ICE car is not available in an EV. Furthermore, considering the amount of energy needed to operate the vehicle is not sufficient, as this vehicle stage is only a part of the complete energy chain that includes also preparation and distribution of the fuel vs. electric power generation and distribution. All these stages need to be assessed to find out the true efficiency, and to be able to estimate potentials for reduction of GHG gases, CO2 in particular. This paper describes assessment of the energy efficiency of two EVs, converted from normal ICE-driven cars using mostly commercially available components. Test programme consisted of various driving cycles, as well as low ambient temperatures. Furthermore, efforts were made to separate the contribution of every sub-system to the overall efficiency. The results indicate that total energy efficiency is heavily dependent on type of driving - urban or highway. In addition, it was noted that low ambient temperature also deteriorates performance and efficiency quite considerably",
keywords = "EV, efficiency, driving conditions, cold ambient temperature",
author = "Juhani Laurikko and Kimmo Erkkil{\"a} and Ari-Pekka Pellikka and Jukka Nuottim{\"a}ki",
note = "Project code: 35612 ; International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, RHEVE 2011 ; Conference date: 06-12-2011 Through 07-12-2011",
year = "2011",
language = "English",

}

Laurikko, J, Erkkilä, K, Pellikka, A-P & Nuottimäki, J 2011, 'Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results' Paper presented at International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, Rueil-Malmaison, France, 6/12/11 - 7/12/11, .

Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results. / Laurikko, Juhani; Erkkilä, Kimmo; Pellikka, Ari-Pekka; Nuottimäki, Jukka.

2011. Paper presented at International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, Rueil-Malmaison, France.

Research output: Contribution to conferenceConference articleScientificpeer-review

TY - CONF

T1 - Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results

AU - Laurikko, Juhani

AU - Erkkilä, Kimmo

AU - Pellikka, Ari-Pekka

AU - Nuottimäki, Jukka

N1 - Project code: 35612

PY - 2011

Y1 - 2011

N2 - Electric vehicles are claimed to be superior in terms of energy efficiency when compared to vehicles propelled by an IC-engine. This is particularly true, if we weigh the gross energy content of the fuel used against the uptake of electricity to charge the batteries. However, a passenger vehicle needs energy also to keep the cabin temperature warm or cold, depending on the season. Especially in winter conditions the cabin heating is a challenge, as an abundance of excess energy as in an ICE car is not available in an EV. Furthermore, considering the amount of energy needed to operate the vehicle is not sufficient, as this vehicle stage is only a part of the complete energy chain that includes also preparation and distribution of the fuel vs. electric power generation and distribution. All these stages need to be assessed to find out the true efficiency, and to be able to estimate potentials for reduction of GHG gases, CO2 in particular. This paper describes assessment of the energy efficiency of two EVs, converted from normal ICE-driven cars using mostly commercially available components. Test programme consisted of various driving cycles, as well as low ambient temperatures. Furthermore, efforts were made to separate the contribution of every sub-system to the overall efficiency. The results indicate that total energy efficiency is heavily dependent on type of driving - urban or highway. In addition, it was noted that low ambient temperature also deteriorates performance and efficiency quite considerably

AB - Electric vehicles are claimed to be superior in terms of energy efficiency when compared to vehicles propelled by an IC-engine. This is particularly true, if we weigh the gross energy content of the fuel used against the uptake of electricity to charge the batteries. However, a passenger vehicle needs energy also to keep the cabin temperature warm or cold, depending on the season. Especially in winter conditions the cabin heating is a challenge, as an abundance of excess energy as in an ICE car is not available in an EV. Furthermore, considering the amount of energy needed to operate the vehicle is not sufficient, as this vehicle stage is only a part of the complete energy chain that includes also preparation and distribution of the fuel vs. electric power generation and distribution. All these stages need to be assessed to find out the true efficiency, and to be able to estimate potentials for reduction of GHG gases, CO2 in particular. This paper describes assessment of the energy efficiency of two EVs, converted from normal ICE-driven cars using mostly commercially available components. Test programme consisted of various driving cycles, as well as low ambient temperatures. Furthermore, efforts were made to separate the contribution of every sub-system to the overall efficiency. The results indicate that total energy efficiency is heavily dependent on type of driving - urban or highway. In addition, it was noted that low ambient temperature also deteriorates performance and efficiency quite considerably

KW - EV

KW - efficiency

KW - driving conditions

KW - cold ambient temperature

M3 - Conference article

ER -

Laurikko J, Erkkilä K, Pellikka A-P, Nuottimäki J. Assessment of the energy efficiency of the propulsion system in an electric vehicle. Methodology and results. 2011. Paper presented at International scientific conference on Hybrid and Electric Vehicles, RHEVE 2011, Rueil-Malmaison, France.