1.
Karlsson, Sten, 1951, et al.
(författare)
Indicating and managing BEV range issues in two-car households
2017
Ingår i: Proceedings of EVS30, Electric Vehicle Symposium and Exhibition, Oct 9-11, 2017, Stuttgart, Germany.
Konferensbidrag (refereegranskat) abstract
We discuss from various perspectives the range limitation; possible indicators, different relaxation options and the actual adaptation in two-car households, using GPS-loggings of both cars simultaneously for 1-3 months in 64 two-car households, and interviews after a BEV trial in 25 of these households. Indicators such as DRA are less useful in two-car households. Instead the flexibility in such households may drastically reduce the range issues. The actual adaptation in households shows that there are numerous reasons to why the options are not fully utilized. Still, none of the test households stated a perceived limitation due to range.
2.
Jonson, Emma, 1981, et al.
(författare)
Electrification potential of the car – estimate from a mid-size Swedish town
2010
Ingår i: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010; Shenzhen; China; 5 November 2010 through 9 November 2010.
Konferensbidrag (refereegranskat) abstract
An electrification of vehicles can contribute to increased energy efficiency and decreased air pollution in urban environments. The high vehicle costs involved, especially for the batteries, means that careful considerations of the options are needed. We have investigated the optimal design and potential for plug-in hybrid electric vehicles (PHEV) under various viability conditions with the help of a data set for individual vehicle movements from a mid-size Swedish town. In the estimates each car is equipped with a battery cost-optimized in size with respect to the individual car movement pattern and charging options expressed as the minimum break time interval required for considering recharging. The resulting optimal battery size is relatively small for lower economic viability, but increases with raised charging options. For high economic competitiveness the optimal sizes are larger but decreasing with better recharging possibilities. The results point to a PHEV design strategy with a small battery in an introductory phase and then an increased size when the economic competitiveness is further enhanced. Still the resulting optimal battery size is highly dependent on the specific movement pattern of the individual car. It is now urgent for the continued development, planning, and estimates of proliferation and impact of electrified vehicles that further statistical data, today mostly lacking, for the movement patterns of individual vehicles in various regions are assembled and utilized.
3.
4.
Karlsson, Sten, 1951
(författare)
Linking mobile and stationary energy system: potential for plug-in hybrid vehicles
2011
Ingår i: F Johnsson (ed.) et al. European energy pathways – Pathways to sustainable European energy systems. - 9789197858519 ; , s. 147-155
Bokkapitel (övrigt vetenskapligt/konstnärligt) abstract
Increasing demands for energy efficiency in transportation, as well as recentadvances in electric conversion, control, and storage have facilitated theelectrification of the automobile and increased the attractiveness of gridelectricity for transportation energy. The viability of using electric vehiclesfor personal transportation, with a focus on plug-in hybrid vehicles (PHEVs),is investigated. Important factors determining the viability are identified andvarious implications of possible linking of the stationary and mobile systemare assessed. It is found that the design of PHEVs has to be individually adoptedto increase their competitiveness. Moreover, synergies can be reached inthe integration of PHEV with the electric system, even though participation inregulatory markets is unlikely to push the introduction of PHEV.
5.
Karlsson, Sten, 1951, et al.
(författare)
The importance of car movement data for determining design, viability and potential of PHEVs
2011
Ingår i: Proceedings of International Advanced Mobility Forum (IAMF) 2011, March 8-9, 2011, Geneva Switzerland.
Konferensbidrag (övrigt vetenskapligt/konstnärligt) abstract
We demonstrate that representative car movement data is a crucial factor in determining viability, potentials, and design strategies for PHEVs, by assessing these parameters with the help of a specific data set for individual vehicle movements from a mid-size Swedish town. We then present the ongoing Swedish car movement data project and some early results and experience.
6.
Karlsson, Sten, 1951
(författare)
The Swedish car movement data project Final report.
2013
Rapport (övrigt vetenskapligt/konstnärligt) abstract
SummaryThe aim of this project has been to gather and analyze a larger amount of data on the characteristics and distribution of the movement patterns of individual, privately driven cars in Sweden by measurement with GPS equipment. Potential cars to be logged were recruited from a stratified random selection of cars from the Swedish motor-vehicle register. The GPS equipment was sent by mail to be installed by the owner/driver. Over 700 cars have installed the equipment for around two months each in 9 campaigns with up to around 100 logging units. The first measurement period started in June 2010 and the last ended in Sept 2012. The data (timestamp, position (horizontal and vertical) and velocity (speed and direction, and identity of used satellites) gathered with 2.5 Hz was transmitted via the mobile net to a intermediary server, for later transfer to a final storage together with road information in a source database, from which various basic data and statistics for the trips and cars have been extracted and stored, Fig S.1. The intended goal of the project has been to finally have high quality car movement data for at least one month for each of at least 500 representative cars. Fig S.1 Overview of the Swedish car movement data project. The project has resulted in a unique dataset on the detailed movements of representative vehicles from the current fleet of privately driven cars in Sweden. The database contains 714 cars with data, of which 528 cars have loggings exceeding 30 days and over 450 cars more than 50 days. The measurement project was initiated for the purpose of achieving appropriate data for various types of analyses connected to the electrification of cars. It is currently used extensively for such purposes. However, the databases freely available for all kinds of research devoted to vehicle movements, energy efficiency, and environmental performance as well as traffic safety and societal planning. Due to the privacy character of some of the data, the availability is further classified according to type. This revised final report presents the layout of the project, the performed measurements, experiences, and contrary to an earlier version results based on all the gathered data. This report is available at the project homepage (www.chalmers.se/brd).
7.
Karlsson, Sten, 1951
(författare)
The Swedish car movement data project – rationale, methodology and first results
2010
Ingår i: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010; Shenzhen; China; 5 November 2010 through 9 November 2010.
Konferensbidrag (refereegranskat) abstract
For plug-in hybrid electric vehicles, the optimal dimensioning, economic viability, and their potential to contribute to the conversion of transport to electric propulsion are dependent on the possibilities of the individual vehicles to replace fuel by electricity. Major factors determining the possible driving on electricity are the battery capacity, the movement pattern of the individual car and the recharging possibilities in the form of available suitable infrastructure. Today there is a lack of good data on the movement patterns for the cars. The aim of the ongoing project described here is to gather a larger amount of data on the characteristics and distribution of the movement patterns of individual privately driven cars in Sweden. 500 randomly selected cars will be tracked for about two months each in 5 campaigns using 100 equipments. The logging is performed with commercial equipment containing a gps unit, including a roof-mounted antenna, and a gprs communication unit. Logged data are time, position, speed, and number and id of used satellites. The measurement started in June 2010 will end in June 2011. We will here present measurement experiences so far and results based on the initial measurement campaign
