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0 pointsmidoridensha2y ago0 comments

>That's a really strange thing to see here on HN. Where did you get this idea?

Why is this strange? I see this kind of ignorant nonsense here all the time.

This site is absolutely full of software people who, because of Dunning-Kruger, think they're experts at everything technical. Electrical engineering isn't that far from the software world (computers are electrical, and their design is within the EE world), so software people frequently think they're experts at anything EE when in fact they don't even understand Kirchoff's Laws, much less the realities of modern-day AC and DC power transmission.

There's been multiple discussions here in recent months with these people advocating absolutely idiotic stuff like a whole-house 5V DC supply, showing they don't even understand Ohm's Law.

On a side note, it's very frequent that I see posts here from people who apparently have never heard of an ad-blocker, yet are complaining about ads.

0 comments

adrr2y ago

I guess you never been in a data center in the last 10 years. All modern DCs run on DC power because stepping down voltage is easy and 95%+ efficient. Why do we backhaul electricity across the country by DC and convert into AC to our house and then back into DC for our stuff? Add renewable energy generation like solar cells and battery storage and AC makes no sense.

Theres a reason why china is spinning up DC power grids while posts like mine get bashed on.

joenathanone2y ago

Data Centers that use DC still have AC to the racks, then a UPS or similar device converts to DC and distributes to the equipment on the rack. DC is inefficient for long distance, unless you are talking HVDC which is another story and it is disingenuous to act like they are comparable.

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