The Most Efficient Semi Truck Ever! Tesla Semi Physics Analysis
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- เผยแพร่เมื่อ 26 มิ.ย. 2024
- In November 2017, Elon Musk presented the new Tesla Semi promising to revolutionize the transportation industry. Up to this point electric trucks were considered something of the category of fiction, since their efficiency was very low and many automakers considered them an ineffective replacement for a conventional semi. With the lowest coefficient of drag of any semi truck Tesla is offering EV alternative to the trucking industry. In this video we look at the new Tesla Semi and calculate energy consumption and efficiency. Included in the calculations are aerodynamic drag and rolling resistance estimates.
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Resources:
Rolling Resistance Validation (2015): www.dot.state.mn.us/research/T...
Timestamps:
00:00 Intro
00:30 Insane Aerodynamics
00:55 Frontal Area Estimation
01:46 Aerodynamic Drag Calculation
02:45 Coefficient of Rolling Resistance
03:50 Rolling Resistance Calculation
04:27 Power Consumption vs Traditional Semi
06:26 How Efficient?
07:54 Battery Size
08:42 Energy Density and Battery Weight
09:55 Drawbacks and Conventional Semi Comparison
11:00 Outro
#tesla
#semi - ยานยนต์และพาหนะ
Just as an referenzen, a EU semi truck like Mercedes Actros weighs about 7300kg to 8200Kg. Diesel Engine (1200kg)+ Transmission (300kg) + 800l Fuel (664kg) + Propshaft 100kg = 2264kg. Just the Battery gives the Tesla Semi a penalty of 2300kg. Of course, that would assume that e-motors, inverters, transmissions have a weight of 0.
It's the drag and R.R. that a have a bigger impact though
Hit sub! Thanks for this excellent survey. We have 4 Tesla Semis reserved for our wholesale nursery in CT. We reserved the 500 mile variants, as our delivery range is up to 420 miles per day, and on-road charging solutions will be slower to roll out than on-site level 2 options. We use shorter 44' trailers, and ship our plants on wheeled carts. Loaded, each cart weighs around 1000 lbs. Each trailer holds 34 carts, so we should be well under the 80k U.S. weight limit. Our trucks leave at 5am, and usually shoot up to the furthest delivery location (customers dont open until 7-9am), and then work their way back, unloading carts as they go. Thus, the truck gets lighter through the day. This lightening, combined with driving 60-65mph, should give the trucks enough range cushion to return to base. Interestingly, Tesla reps have told us that colder temps will have less range impact on the Semi than on their cars, as the batteries will be stacked, and not in one single layer as with the cars. So the 4680s in the Semi will cuddle, and keep each other warm. Tesla informed us earlier this year us that our trucks will deliver '2023 at the earliest'...
"Actual real-world data shows that 90% of semi trucks weigh in at less than 73,000 lbs with their loads." Tesla semi wins when fuel, maintenance, service life are factored in. Batteries are limiting factor.
I've read somewhere, that most of the freight is volume, not mass, constrained. About 80-85%. So, it's a particularly good business case for the Tesla Semi, even if the packs are heavy.
Very interesting... That would bring efficiency and therefore range way up
I drove 18 wheelers for 3 years long time ago, close to weight limit a few times, but not whole lot. I don't think the weight of the battery pack is going to be a big deal, one reason is the EV truck is not going to replace entire ICE truck in a short period of time, by the time long haul start to using EV, the weight of battery pack should come down more of today's estimated 4680 battery pack. Trucking companies are constantly looking for ways to reduce cost - EV will fit their bill in long run
I think weight is the limiting factor more for densely packed things like hauling grain or corn where the trailer is filled up with little wasted space.
I've unloaded trucks for a retail store and things like consumer products are not very densely packed. The trucks would arrive "full" in that there was nowhere else to put another pallet, but the trucks weren't close to being overweight.
@@SLee-vj4px Makes sense. Thanks.
@Guglis Amonopol weight does need further improvement, but the advantage of 4680 over 2170, is that 4680 holds 5 times more energy than 2170 and the process making 4680 is identical to 2170, it means the productivity of battery production will improve 5 times. for such high volume demand, this is huge
Most people only use drag coefficient to tell if a vehicle is efficient, but sectional density (mass per unit of frontal area) is just as important.
Bigger vehicles are more fuel efficient because of that, that's why most semi trucks manufacturers do not care about drag since it's negligible on a vehicle of this size.
But for a battery electric vehicle every percent of efficiency matters.
Man, I love your channel. Thanks for taking the time. Happy holidays.
One important thing not mentioned!
No reason a diesel truck cant have the same low air drag as an EV so this is not an EV vs diesel straight up, but current diesel VS TESLA truck.
Great work. Thanks from France
Thanks for doing all of the calculations with a solid explanation of the forces and factors involved. I think that EV semis will pay back well over the long haul. 🚛🚚🚒
Brilliant video, thank you!
Great video, thanks.
Nice job 👍
Well i dont think you are right.
Reality1: Tesla Model 3 500 kg battery for moving 1700 kg (3700 lb) for 360 miles range
Reality2: Tesla Model 3 800 kg battery for moving 1700 kg (3700 lb) for 560 miles range
3700 => 74000 lb = 20x
20x500 kg => 10000kg (22000lb) for a Range of 360 miles
20x800 kg => 16000kg (35000lb) for a Range of 560 miles
20x1600 kg => 32000kg (70000lb) for a Range of 1200 miles
For Tesla semi the Batterie capa must be 20x better, this will take minimum 5 years. There is a capacity graph development in the net.
Let's wait for the the real world test and not the values from a sales pitch...
Great analysis. Now would be interesting to calculate what power Tesla semi needs to go at 60mph on that 5% incline and how much power it needs to do the 0-60 in 20s.
Can you provide your sources/links to where you get the numbers from? Like energy dencity of Model S Plaid Battery or trailer dimension and stuff? Just for completion purposes
Typo at 4:54
Total forces = F(v) = air resist TIMES not plus R.R.
I think for heavy duty uses like semi trucks, hydrogen fuel powered electric semi's might make more sense than battery packs.
You must be a 40 year old musty man
Hi, I really enjoy your video, I have a question which seem no one has an answer: Since the Semi Truck will be charged by Mega Charger couple times or more a day. How long of the Battery Life will Last. We all know, Avoid supercharging on Tesla EV unless it is necessary ( in all Tesla Owners Manel ) . With Semi Truck only using Mega Chargers, I think the Battery will be ' Fried " in a year of two .//.///😁
Now do the math on the power requirements for the charging facilities and you will see why this thing is huge fail
Great for doritos!
Also most nonexistant
They just about to start delivering the first test units to PepsiCo.
@@jamescoppe start production =/= start delivering
@@BusinessTravelVlogs Not sure what you mean, but I said deliveries.