ICCT report shows that only small, very short distance, commuter…

icct-report-shows-that-only-small,-very-short-distance,-commuter…

ICCT report shows that only small, very short distance, commuter…

ICCT report shows that only small, very short distance, commuter planes could be electrified any time soon
2022-08-05 20:41:00
A recent report by the ICCT (International Council for Clean Transportation) on electric aircraft concludes that electric models will be limited to short range flights (< 500 km) in the foreseeable future.  Despite improvements in battery technology in the past three decades, batteries remain inadequate to the task of electrifying most of passenger aircraft. They are just not powerful enough.  The energy density of lithium batteries increased 3-fold over the past 30 years, but improvements way greater than that would be needed.  The ICCT report looked at the size of battery, the space it would take up, and how much power it could provide. Some key parameters are the “eb” – the amount of energy stored per unit of battery mass), and the “vb”, the energy stored per unit volume). eb is measured in watt-hours per kilogram (Wh/kg) and vb is measured in watt-hours per liter (Wh/L). Fossil jet fuel has a specific energy nearly 50 times higher than the best lithium battery. Looking at the 4 categories of plane, commuter, regional, narrowbody, and widebody, only the commuter (up to 19 passengers, up to 450km range – ideally not over 200km) could be electrified. .Tweet     WHAT TO EXPECT WHEN EXPECTING ELECTRIC AIRPLANES JULY 14, 2022 By: Jayant Mukhopadhaya   (at ICCT – International Council on Clean Transportation) Our just-released ICCT report on electric aircraft concludes that electric models will be limited to short range flights (< 500 km) in the foreseeable future. Despite leaps-and-bounds improvements in battery technology in the past three decades, batteries remain inadequate to the task of electrifying most of passenger aviation. Our paper explored the capabilities of electric aircraft given current and projected battery technology. Now we address the inverse: how good do batteries need to be to power most flights? As any economy passenger wedged into the 28 inches between seat rows will attest—after paying the surcharge for an 8 kg carry-on—mass and volume on an aircraft come at a premium. This is just as true for the mass and volume of an aircraft’s battery pack, whose key metrics are the pack-level specific energy (eb, the amount of energy stored per unit of battery mass), and the energy density (vb, the energy stored per unit volume). eb is measured in watt-hours per kilogram (Wh/kg) and vb is measured in watt-hours per liter (Wh/L). In our paper analyzing electric aircraft, we derived the electric range equation and modified it to account for reserve requirements. Here we rearrange the equation to calculate the eb needed to power flights of different stage lengths, using assumptions for a few aircraft parameters. Aircraft-specific parameters, such as the battery mass fraction (BMF, or battery mass as a share of t Read More


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