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Which problem? Please be more clear, more specific instead of using slogans. As I understand you want to cut emissions, reduce it to zero. Fine. EV vehicles g
by thsksbd 3y ago
Which problem? Please be more clear, more specific instead of using slogans. As I understand you want to cut emissions, reduce it to zero.
Fine.
EV vehicles generally, and EV semis in particular, are a massive impediment to the rapid decarbonization of the transportation sector.
Why?
1. A large EV semi has a gargantuan amount of batteries.
2. Batteries are a finite resource, limited by our ability to produce them.
3. Semi engines are very fuel efficient, as far as thermal cycles go.
4. Cities have very many, very inefficient small vehicles undergoing start-stop cycles Most of these vehicles run on straight gasoline.
5. More carbon can be taken off our transportation network by keeping diesel semis and using the batteries an EV semi would have used to hybridize vehicular traffic.
Go ahead, do the math and see that N5 is correct. For representative numbers compare the F150 that comes in regular, hybrid and EV. When opportunity costs are considered, the hybrid F150 kicks the teeth out of the EV one in carbon emissions.
- wilg 3y agoOne zero emission truck is worth about 40 zero emission cars in terms of grams of CO2e. And diesel trucks cannot go zero emission. So this makes no sense to me.
- thsksbd 3y agoWell, what can I say? Do the math! One EV truck = x amount of batteries. Per the article, 700kWh One F150 hybrid [1] = y amount of batteries. Per Ford, 1.5 kWh [2] One EV truck = x/y F150 hybrids, or 500 pickup trucks. 500 hybrids pickups are sacrificed to make one Tesla EV semi. Now, look up the amount of miles driven by your average delivery guy. This guy probably has the worst fuel situation on the road. Heavy vehicle. Stop and go. Urban. I'll be nice and assume 15000mi, what the DOE estimates for the average commuter Subtract fuel consumed by Amazon guy on regular F150 (18mpg) vs hybrid F150 (25 mpg) on 15000 miles. 233 gallons. Multiply by x/y. 500x233 This is the fuel saved by hybridizing. 116 000 gal 116 000 gallons of fuel. I actually didn't believe this, so i did the math twice. A YEAR In a year, on average, a semi goes through just less than 10 000 gallons of fuel. [3] So the single EV truck costs 11X more fuel than the fleet of 500 delivery vehicles that could been built with its battery pack. Note, that this analysis is incredibly favorable to the EV semi as it assumes there is no CO2 emission from charging it. The batteries magically recharge. This is grossly untrue. Nor am I considering that truck batteries aren't going to last very long. [1] F150 is used because it comes in regular, hybrid and EV trim, and is roughly the size category that an amazon or FedEx delivery truck. [2] https://www.ford.com/cmslibs/content/dam/brand_ford/en_us/brand/trucks/f150/2020/Mediakit/F_150_PowerBoost_Graphic_1_1.pdf https://www.ford.com/cmslibs/content/dam/brand_ford/en_us/br... [3] https://www.truckinfo.net/research/trucking-statistics https://www.truckinfo.net/research/trucking-statistics*
- thsksbd 3y agoBtw, all these analysis are valid for EV cars too. EV cars are terrible for CO2 emissions. because their battery packs are too big.