7 ms·
Assuming perfect efficiency and that people are doing the speed limit, 1 mile of 200kw charging at 70 mph gives you a grand total of 2.8 kWh of juice. Of cours
by haileys 3y ago
Assuming perfect efficiency and that people are doing the speed limit, 1 mile of 200kw charging at 70 mph gives you a grand total of 2.8 kWh of juice.
Of course, there will be losses in power transfer, and nobody in the US actually does the speed limit, so in reality the actual amount of charge you'll be able to pick up off this thing will be significantly less than that.
What a complete boondoggle. Embarrassing for everyone involved.
- throwaway22032 3y agoThis is obviously hilariously cost inefficient and a bad idea for other reasons, but it's unclear to me why you think that 2.8kWh in a mile is a bad result here. Most EVs use something like 0.2-0.4kWh/mile. So in fact even at 10% efficiency you could drive forever if this stuff was scaled out.
- deleted 3y ago[deleted]
- oh_sigh 3y agoI think the problem is that it is massively expensive compared to asking car drivers to stop for 15 minutes every 200 miles.
- r00fus 3y agoThis is't 2.8kWh per mile. There's only 1 mile being built. So you maybe get 2kW for driving that stretch - assuming you have the inductive capabilities in your car. Does any car support this yet? A nice theoretical boondoggle when we could be building out rail or funding deployment of actual charging stations.
- throwaway22032 3y agoI totally agree. Just raising the fact that 2.8kWh/mile if actually true works fine.
- flangola7 3y ago200kW rails on an exposed public road is going to get people killed.
- wlesieutre 3y agoIt's inductive charging, instead of exposed rails it has poor efficiency
- anonymousiam 3y ago100% agree. Efficiency will be far from perfect. The minimum ground clearance, the maximum loop sizes, and the added weight/drag from the power conversion systems will add to the inefficiency. Not to mention (although I'm about to) the enormous RFI such a system would generate. https://en.wikipedia.org/wiki/Electromagnetic_interference https://en.wikipedia.org/wiki/Electromagnetic_interference
- slow_typist 3y agoInefficient use of copper, too. But inductive charging in parking grounds could have some potential, especially if cars could put the receiver on the ground while parkcharging.
- progre 3y agoIf the car is still a wire would be cheaper and more effective I think.
- slow_typist 3y agoMore efficient for sure, but it would be very convenient, and could drive acceptance of EVs. As a bonus, you don‘t need to allocate space to charging stations.
- DiggyJohnson 3y agoYou haven't explained why its a boondoggle? Seems like Florida is taking a first step in realizing a technology that hasn't been scaled out anywhere yet. The point of an electrified road is not to magically charge your vehicle to capacity in seconds, but to sustain and extend the travel distance of EVs. > What a complete boondoggle. Embarrassing for everyone involved. I'm still stuck on this line, it seems so out of place. What is embarrassing about this project? When did building out infrastructure become embarrassing? Would you say the same if it was a different state?
- sclarisse 3y agoThe embarrassing part is the “2.8 KWh” figure. For comparison, since the number doesn’t seem to resonate with you, that generous estimate of the energy involved is comparable to about 0.1 gallons of gas, maybe a little lower. It’s an expensive and highly ineffective way to charge cars a very small amount, and is fundamentally a poor use of society’s limited resources.
- Aperocky 3y agoThe entirely infeasibility and the incompetence or malice in the whole chain of people that pushed and approved this project qualifies it as a boondoggle. In our local universe entropy must be preserved, and energy comes at a premium. That is the reason nobody have flying cars since they were envisioned in the 60s. Same for hydrogen fuel cells, more realistic but still overhyped as it is not more efficient than simple battery, it has worse logistics and delivers less. The tech in terms of auto is now dying as reality is slamming into its face. And for the same reason (energy inefficiency and costs) this project will also die.
- Ekaros 3y ago200 kW sounds quite scary to me. I wonder if there is any risky scenarios. Where something might be accidentally coupled.
- Kye 3y agoI assume it's like USB where power moves at a safe level (if at all) until both ends have had a chat about it.