41–50 of 111 posts
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In the automotive industry, we call them dynamometers. Though you'll never hear anyone say that, we just call them dynos.
Not necessarily, it could be a rolling road, which is more similar to what the OP described.
How about, oh I dunno, actually posting a recording of the noise?
You want the author to add a random buzzing sound to add more credibility to the article?
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Unless they're melting their own aluminum. =) Note the article doesn't really mention electric-type humming. One neighbor described the sounds he hears at night as "sheets of metal slamming, clanking, almost a grinding sound." This idea they're running large amounts of electricity to charge EVs seems far-fetched. And if a charger is making that much noise to wake the neighbors then, well, they have larger technology…
I realise you're joking, but one doesn't turn an aluminium electrolysis cell on and off at a whim (as in off in the day, on in the night). Shutdown and restart is bloody expensive, dangerous, and hard work to boot.
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Are you? http://www.pge.com/en/mybusiness/rates/tvp/toupricing.page?W... Instead of a single flat rate for energy use, time-of-use rate plans are higher when electric demand is higher. This means when you use energy is just as important as how much you use. Winter has two rate periods: off-peak and partial-peak. Summer has three: off-peak, partial-peak and peak. During peak periods, defined as weekdays from noon to 6…
Yes. Sure, we all know that electricity is cheaper at night, but would it make overall sense for the engineers to do their work at night for this reason? First, they don't have to use the energy when they draw it from the grid. Charge an EV at night and test it all day. Second, it only costs a couple bucks to charge an EV car even at peak rates. Surely the engineer's time and schedule is more important.
Another article from Mercury News. http://www.mercurynews.com/business/ci_29558045/apple-silent...
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I realise you're joking, but one doesn't turn an aluminium electrolysis cell on and off at a whim (as in off in the day, on in the night). Shutdown and restart is bloody expensive, dangerous, and hard work to boot.
I'm half-joking. If this plant is pulling large amounts of current, no matter what they're doing, the utility might be asking them to do it at night.
I'm half thinking that this is all shadow games, Apple having two guys running around and making mechanic-sounding noises to stir up the rumor mill. Mainly because a) making cars isn't really something that produces a lot of noise and b) because you don't put your real skunk works in a residential area. But you do put a fake one there.
It would be interesting if someone with a thermal imaging camera could have a look at that plant during day/night. If they're pulling loads of 'leccy only during the night, the plant should show anomalous cooling behavior.
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Not necessarily, it could be a rolling road, which is more similar to what the OP described.
A rolling road is another term for a chassis dynamometer.
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A rolling road is another term for a chassis dynamometer.
I thought a dyno is a mechanism that a standalone engine can be rigged up to on the bench to test it under (typically computer-) controlled conditions, measure its output, simulate different driving conditions, etc.