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Fast chargingBest mileageLow Costno noise
Forecourt fast chargers are charging up to 45p per kWh - about 9.5 p per mile.
In order to compete with liquid fuel for convenience, a car needs to recharge at 40 MW and have a "tank" capacity of at least 2GJ. Anything less, and it becomes an encumbrance.If it uses the same fuel as an "essential" process like cooking and lighting, the supply must be differentiated and separately taxed. If not, either the Treasury will lose billions, or you will have to tax domestic electricity or gas at 300% of the cost of production.
The charging rate I think is down to the battery,
. 40 MW is...
A standard fuel pump delivers 1 liter per second of petrol or diesel. At 40 mJ per liter that's 40 MW in my book.
A standard fuel pump delivers 1 liter per second of petrol or diesel. At 40 mJ per liter that's 40 MW in my book. If you are in a hurry you can go to the HGV lane where the pumps run at 80 MW but the nozzle may not fit. Aircraft refuel at 20 - 40 liters/second - not sure if you can get a 20 minute turnround with an electric plane!
Have you heard anyone complaining that we couldn't use methanol as a fuel because it would "only" deliver about 20 MW at that flow rate?
Have you ever tried to lift a 3 x 100 mm diameter cable to plug it in to a car? it weighs about 230 kg per meter and a 10m length (in case you have parked the car the wrong way round to the pavement in a one-way street) will cost you about £20,000. You need to derate it to prevent core overheating, but I grant you it will carry around 32 MW for a short period - almost as long as it will take someone to saw it off for scrap.
So, as I said before, the 40MW rate is meaningless.
It has a precise meaning in this context. It is...
I refuse to wear a £20 "smart watch" because I object to a machine telling me when to stand up or breathe.
BC, on the other hand,...
We are very different.
. If you run out of "juice" in the middle of nowhere the nice man from the AA can bring you 200 MJ in a can, ready for immediate use.
Quote from: alancalverd on Yesterday at 21:50:15It has a precise meaning in this context. It is...The product of an arbitrary choice of 1 l/m and the heat of the reaction of oxygen with an oily hydrocarbon.
If the nice man from the AA turned up, he wouldn't need to bring as much energy with him to get you home, because electric cars waste less.
1 liter per second, not per minute.
The use of petroleum hydrocarbons as fuel seems rational: non-corrosive, low toxicity, stable, easily vaporised, high energy density, controlled burn.