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This reminds me of electric trucks that need a megawatt of electricity per day per truck.
by yuhong 9y ago
This reminds me of electric trucks that need a megawatt of electricity per day per truck.
- mnw21cam 9y agoUnits alert. Megawatt per day makes no sense. Perhaps you meant a megawatt-hour per day? Or, if driven for (say) 10 hours, 100kW. For reference, the average family car engine can generate on the order of 75kW, so 100kW for a truck is quite good, I think.
- yuhong 9y agoI mean driving 500 miles per day for maybe 8 hours might require one megawatt.
- mnw21cam 9y agoA megawatt for 8 hours, so 8 megawatt-hours. That's an obscene amount of energy, and probably out by a factor of 8.
- yuhong 9y agoYea, I mean 100 megawatt per hour for ten hours equals 1 megawatt per day of driving.
- mnw21cam 9y ago100 megawatt per hour is a rate of increase of power that means the total amount of energy proportional to the square of the time. I find it unlikely that a reasonable sized vehicle could sustain that rate of increase for long. After ten hours, the power would be 1GW, which would be sufficient to make the vehicle glow quite brightly. The vehicle would have used 5GWh of energy, the equivalent of 50000 battery packs of a Tesla 2017 Model S 100D. I don't think what you are typing means what you think it means.
- yuhong 9y agoSorry, 100 kilowatts per hour. it is a typo.