Design and Simulation of Advanced Materials
Fuel Cell Hybrid Electric Vehicles 2019-01-0828
Two fuel cell hybrid electric vehicle (FCHEV) designs are proposed and evaluated. The first is a baseline model inspired by a Toyota Venza (2009) design where the body of the FCHEV is mainly composed of steel/ iron 67% while the plastic and aluminum used are only 14% and the total body mass is 1290 kg. The advanced model is based on a light body vehicle inspired from a Lotus Engineering design where plastic and aluminum account for more than the baseline and constitute around 39 % of the total body mass while mild steel and iron are only 7%. The use of such light materials allows the reduction of the total body mass by around 38.4 % (496 kg) with a projected cost factor increase of 1.03 only. Although some material used are more expensive than steel/iron the significant mass reduction offset the increased cost due to using more expensive material. The mass of each component can be seen in table 4 in addition to the mass reduction of using lighter material. In table 5 lists the technical specifications of the reduced weight FCHEV. The baseline FCHEV have identical parameters except for its curb weight which is 1508 kg. The car simulation is carried out using an optimal control strategy to minimize the weighted hydrogen consumption and battery degradation using dynamic programming. Table 1 below shows the performance of the two designs on the Highway Drive cycle, yielding a savings of 14.3% in terms of H2 consumption. On the Urban Dynamometer Drive cycle (UDDS) the H2 consumption was 90 g for the baseline versus 70.5 g for the advanced design or 21.7% savings.
Chayban Ghabech, Sami H. Karaki
American University of Beirut, American Univ. of Beirut