Energieffektiv användning av biogas för fordonsdrift
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The energy efficiency of three different powertrains is investigated in a well-to-wheel (WTW) analysis including all the steps from raw gas to wheel. The investigation is done on a bus during different drive cycles; inner-city traffic, rural traffic, constant speed + one stop and constant speed. The powertrains investigated are battery electric motor, internal combustion engine and a simplified hybrid powertrain (only accounting for the savings from regenerative braking). The study is done in two steps, well-to-tank (WTT) which is based on literature research and tank-to-wheel (TTW) which is based on Scania specific data.As a complement to the energy efficiency analysis a partial cradle-to-gate study on the energy consumption during battery manufacturing is done. This to investigate the impact the batteries in the battery electric vehicle (BEV) have during their lifetime.The study show that the BEV is the most energy efficient option, but the difference varies a lot depending on the drive cycle. The BEV performs best in the inner-city traffic drive cycle where it is almost twice as energy efficient as the internal combustion vehicle (ICV) and uses about 30 \% less energy than the hybrid electric vehicle (HEV). The ICV and HEV compare better with the BEV for drive cycles with higher speeds and fewer stops. In the rural- and inner city drive cycles the regenerative braking savings are between 17 and 28 %. The energy consumption of the battery manufacturing does not prove to have a significant impact over the batteries life time, consisting of only 1 - 2.6 % of the total energy consumption of the BEV during a drive cycle.The results of this study should not be interpreted as an indication of the best way to use biogas. The comparison is only done on the energy efficiency and does not include economic factors such as energy- and vehicle prices which might influence the feasibility of the result.The study does not cover other well-to-wheel aspects than energy efficiency. For an overall picture other factors need to be taken into account, e.g. the cost of vehicle technology and fuel infrastructure, green house gas emissions, alternative use of biogas and electricity as well as other available options for heavy duty vehicles.
Place, publisher, year, edition, pages
2016. , 67 p.
Teknik, Biogas, fordonsdrift, energianalys, elbuss, gasbuss, hybrid, WTW, Well-to-wheel
IdentifiersURN: urn:nbn:se:ltu:diva-54807Local ID: bbcdf74f-22a1-4c7c-a7bd-06a04142eaf0OAI: oai:DiVA.org:ltu-54807DiVA: diva2:1028189
Subject / course
Student thesis, at least 30 credits
Sustainable Energy Engineering, master's level
Validerat; 20160621 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved