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CMU analysis finds BEVs powered with natural gas-based electricity have about 40% of the lifecycle GHGs of a conventional gasoline vehicle

Green Car Congress

According to a new lifecycle analysis by a team at Carnegie Mellon University, a battery electric vehicle (BEV) powered with natural gas-based electricity achieves around an average 40% lifecycle greenhouse gas (GHG) emissions reduction when compared to a conventional gasoline vehicle. Earlier post.).

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New UMTRI paper reviews major advantages and disadvantages of battery-electric and fuel-cell vehicles

Green Car Congress

A new report from the University of Michigan Transportation Research Institute (UMTRI) reviews the major advantages and disadvantages associated with battery-electric vehicles (BEVs) and fuel-cell vehicles (FCVs). In their report, Schoettle and Sivak used a national average fuel price for electricity of $0.12/kWh

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Naysayer Alert – the hydrogen red herring

My Electric Car

There has been much discussion for over thirty years or more around the use of hydrogen fuel cells as an alternative to the internal combustion engine. Proponents believe such a car could be easily refuelled with hydrogen and assumed it would have greater range than a pure all-electric car.

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Small-displacement two-stroke H2 engine could address performance and emissions cost-effectively for recreational market; potential for Asian motor vehicle fleet

Green Car Congress

Comparison of brake thermal efficiency and specific fuel consumption at rated power (ICOMIA Mode 5), hydrogen vs. gasoline engines. The lost available energy also results in poor off-design point fuel efficiency. ICOMIA cycle NO x emissions and hydrogen consumption, efficiency-optimized calibration. Oh and Plante.

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U. Mich study: natural-gas-based ICE, BEV and FCV all show promise for environmental benefits relative to conventional ICE

Green Car Congress

In addition to ensuring the same energy source, the analysis was conducted such that the same functional unit and system boundary are assumed for all of the three mobility options, to facilitate a direct comparison of their respective environmental footprints. Credit: ACS, Dai and Lastoskie. Click to enlarge. terrestrial acidification (TA).

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CMU study compares lifecycle GHGs of natural gas pathways for MHDVs; MD BEVs can deliver large reductions, but diesel hard to beat for Class 8

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Battery-electric (BEVs), LPG, and CNG pathways could reduce life cycle GHG emissions for non-Class 8 MHDVs compared to the baseline petroleum fuels. For non-Class 8 trucks (pick-up trucks, parcel delivery trucks, and box trucks), BEVs reduce emissions significantly (31–40%) compared to their diesel or gasoline counterparts.

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Virginia Tech professor proposes simple biomass-to-wheel efficiency analysis to inform decisions on biomass/biofuel/powertrain combinations; the advantage of sugar fuel cell vehicles

Green Car Congress

Comparison of biomass-to-wheel (BTW) efficiency for different biomass utilization scenarios. Sugar Fuel Cell Vehicles and BEVs charged with electricity from a fuel cell (green bars) were the most efficient. Huang and Zhang. Click to enlarge. Among the findings: The current corn ethanol/ICE scenario has η BTW value of ~7%—i.e.,

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