Quote:
Originally Posted by sendler
Please do the math regarding how much battery capacity it would take to move a train any reasonable distance. Or heavy truck. or a large farm tractor. or an earth mover that carries a load uphill. There is no replacing the nearly magical energy density of liquid fuel that we are now blessed with for doing heavy work.
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570 Liters of diesel per day = 5,700 kWh per day. Even if you cut that by2.5 for the extra efficiency of electric motors with round trip losses you get 2,300 kWh per day for a large size farm machine. 12 Tesla grid scale 200kWh powerpacks per day to hot swap in and out. for just one tractor. We are going to need to start making a lot of wire to get all of this power around |
I took the fuel consumption of the harvester,converted to gallons,then to Btus,then kWhs,then using 44.2% thermal efficiency,ended up with 2,696.696 kWh/day.
If the farmer broke their work day into half-days,we'd be looking at 1,348.3 kWh at a stretch,between meals on a long day.
It might be possible for the rear wheels to be the batteries,containing enough battery mass for a half-day's work,then fast-recharge the rig during 'lunch'/'dinner'.
Typically,these tires are filled with water,are extremely heavy,and might as well serve double-duty,rather than just as dead weight.
If rationalized,as a standard dimension,they could be used across all manufacturers product lines,fitting all brands.