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virtualdom

HN member
Joined
Wed, Oct 29, 2014, 8:15 AM UTC
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22
Public activity
13 items

About virtualdom

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Recent public activity

  1. comment
    Comment #27910167

    To be more clear: the US grid with its existing generation capacity could certainly handle 41% of consumers switching to EVs. We would simply not ramp down as many power plants at …

  2. comment
    Comment #27902283

    If half of American commuters switched to EVs, the daily energy demand on the grid would only increase by 10-15%. The difference between peak load and average load is close to 30%,…

  3. comment
    Comment #27680975

    You're right. There are two major errors in just this one paragraph from the article: "Worldwide, humans use roughly one zettajoule per year. Satisfying that demand without further…

  4. comment
    Comment #27672700

    This IEEE article makes some questionable extrapolations in my opinion. First, they start with 2017's global primary energy consumption of 600 PJ, and then round it up (by 66%!) to…

  5. comment
    Comment #26439577

    You've compared the range of a Model 3 driven at 75MPH to a Camry driven at 48MPH, for one thing. But I don't know why you would bring passenger cars into the discussion, since you…

  6. comment
    Comment #26431693

    > Independent testing of the Tesla Semi will prove or disprove all these claims. It sounds like you think it is fine to make claims that are unsupported by any evidence, or by basi…

  7. comment
    Comment #26421408

    A 600 mile battery - say 1-1.2MWh - should only weigh around 10-12K lbs (at 260-300 wh/kg). And you can throw out the 5K lb carbon capture device, and 5K lbs of engine, transmissio…

  8. comment
    Comment #26421273

    An aux heating system would not be necessary for an EV semi: most of the cited 40% of range lost suffered by passenger EVs is due to cabin heating, but an EV semi would actually pr…

  9. comment
    Comment #26420095

    > we believe electrification won't work for long-haul trucking. Bill Gates agrees. is very different from > we ... think electrification is going to be trickier for long-haul truck…

  10. comment
    Comment #26419981

    To answer my own question: Assuming 2KWh / mile average consumption[1], an EV semi powertrain would be pulling ~120KW continuously from the battery. Even at 90-95% efficiency, ther…

  11. comment
    Comment #26417682

    Thanks! From the corrected link: > At 20 degrees, the average driving range fell by 12 percent when the car’s cabin heater was not used. When the heater was turned on, the range dr…

  12. comment
    Comment #26416864

    > plus the batteries lose > 40% of their range in cold weather [2] The link you cited does not mention cold weather range loss for batteries. Can you provide a source for this clai…

  13. story
    Old Uber source code on NPM

    Follow these steps: wget http://registry.npmjs.org/uglify-js/-/uglify-js-1.2.5.tgz tar -xzf uglify-js-1.2.5.tgz vim +15650 package/tmp/app.js -c 'normal zt' I stumbled across this …