Posted on 01/15/2018 12:58:38 PM PST by cp124
I dont know how our grid system and coal powered power plants will handle all this. Our neighborhood transformers are not meant to be running charging a neighborhood of electric cars, they are undersized for an area and require night cooldown time.
This mass delusion is going to cause a world wide economic collapse. No bailouts!
He’s a corporate parrott.
Routine maintenance. IMHO.Otherwise, I wholeheartedly agree.
I was reading about the new Formula E series (It is the F1 for electric vehicles) the teams in FE needs two cars, because halfway through the race, they have to get the second car running, since the first car battery is dead.
Definitely. Yes wait.
Falls at my age aren’t as easy to laugh off as they used to be.
I had a simple fall and wound up in the hospital for a couple of days for observation, since I clot up rather easily.
I had my cell phone in my pocket, and it jammed up against my let at my hip, and created a massive black bruise. Over the next week and a half, that bruise both lightened, and traveled to my toes. It was very light by the time it got there.
I’m sure there are a number of things that will need to be ironed out over time. I wouldn’t have known this specifically, but had figured when more folks got the electric cars, it would cause problems like this.
He probably drinks the kool-ade by the gallon.
None of this will happen in our lifetime but something like it will come along if they can just get a supply of Dilithium crystals or some UnObtanium.
I'll hold my breath...
/S
Yes and no.
Let me guess...were you also a peak oil believer?
For the sake of argument, allow that an F-150 equivalent vehicle at 60 mph results in a steady electric traction motor load requiring 30 kW to maintain speed. If continued for one hour that is 30 kWh drawn from a battery. Referencing a Tesla pack with a usable capacity of approximately 75 kWh, that allows two and a half hours driving time for a range of 150 miles.
One hundred fifty minutes discharge—to replenish the battery within five minutes would require a charge rate a minimum thirty times the discharge. With a specification of 390V peak charging voltage, the current would be on the order of at least 2300 amps. For an internal dissipation loss of 5%, a 45 kW heating load must be withdrawn from the battery and internal buss-bar connections during the charge. The station must supply at a rate of 900 kW instantaneous power for a single vehicle, sufficient to typically supply 450 homes average electrical needs. Switching such a load at a single location poses similar delivery requirements as an industrial facility.
As to using NG in an internal combustion engine or a solid oxide fuel cell, the electric route should net double the mileage. The drawback is that the gas and air supplied usually must be exceedingly free of contaminants that could poison the fuel cell ceramic electrolyte.
That’s what I tell everyone! They are coal, natural gas, or diesel cars! Electric? What a joke!
Electric cars are going to be just great in the next rerun of the 2009 mid-South ice storm... Electric vehicles in a rerun of the New Madrid quakes will be even more disastrous.
One has to think of weeks or in the latter case, months with most of the electric power grid down, and also in the latter case most power plants in a large region are themselves likely down. At least with gas / diesel, one can use a little fuel to run the generators to access a lot more fuel. Generators to charge the batteries of even a few % of the vehicle base are totally unfeasible.
Good analysis. Few people realize just how much energy an average vehicle consumes. Just transferring away the 45 KW internal (charging) dissipation loss you mention is no small consideration.
There are other losses in the total “system” too. This article @ Battery University references energy efficiency of 86% for a Tesla Roadster, and anticipates a lower number for fast charge EV’s. I do not know if generating efficiency at the power plant is included therein — it seems like that would vary too much to be part of that calculation. (?)
Regardless, even 900 KW is a LOT of charging power. Says Mr. Murphy!
Oops, here’s the BU link:
http://batteryuniversity.com/learn/article/bu_808c_coulombic_and_energy_efficiency_with_the_battery
Good one.
To this day, I’ll never forget the obnoxious F.O.R.D. stickers pasted on the GMC/Chrysler trucks driving ahead of me... on my way to the parts store.
“I still cannot identify an advantage (of electric vehicles) over a gasoline or diesel powered vehicle.”
There are some significant advantages.
Silent.
No engine vibration.
Much faster pickup - instant acceleration. The Tesla Model S P100D hit 60mph in 2.28 seconds.
Dramatically fewer moving parts to wear out - only about a dozen. No pistons, rings, valves, pumps, filters, transmission, etc..
No wear on electric brakes - magnetic. No mechanical locking of brakes, or brake fires.
Much lower maintenance cost (about 1/3).
Dramatically less unscheduled maintenance. Batteries degrade gradually, predictably, and can be constantly monitored, to schedule their eventual replacement.
Each wheel has its own motor, so a motor failure won’t leave you stranded.
Safer. The lower center of gravity from having battery pack along the floorboard makes them much less likely to flip, and the absence of gasoline makes them less likely to burn or explode in impacts.
No emissions. People still die accidentally every year from auto exhaust in enclosed spaces, or running the engine for heat while snowed in.
You can have your own personal “gas stations” - just recharge at home or work. For a commuter vehicle, you won’t have to make fueling stops - just plug in at your destination. No waiting, no going out of your way, no sketchy strangers to encounter.
Lower fuel cost. If electricity is 12 cents per kWh — the national average — it would cost $3.48 to go 100 miles. You could also charge from solar panels.
The big disadvantages are high initial price, limited range, time required to recharge, availability of recharging stations while travelling, and a big back-end expense to replace batteries (Nissan and others warranty EV batteries 8 years/100,000 miles). All of those have been getting better over time.
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