A more efficient computer?

[Viena]

Picture from the wiki article of all the long-distance HVDC lines in Europe.
File:HVDC Europe annotated.svg - Wikipedia, the free encyclopedia

In-fact...since most power is generated using DC turbines/generators it is typically sent *AS HVDC* to your local power station, where it is converted to AC to send to your home...where it is converted to DC for your devices...losing 10-40% each step...talk about inefficient.

I'm surprised that you haven't noticed that those HVDC lines are all underwater.

Yes, you are right that HVDC transmission is more efficient than HVAC transmission, but the difference of that efficiency is determined by the environment of the AC line, because of a capacitative effect. When you have AC power lines surrounded by air/earth those losses are very small.

However, the issue of using DC power lines is the low efficiency of DC voltage transformation. Transforming AC is way more efficient and outweighs the losses of transmitting that power on land based lines.

The losses of HVAC on underwater lines are much higher, and in that case, transforming DC is preferred.

In-fact...since most power is generated using DC turbines/generators it is typically sent *AS HVDC* to your local power station, where it is converted to AC to send to your home...where it is converted to DC for your devices...losing 10-40% each step...talk about inefficient.

Source or it didn't happen, because that’s just untrue. Generators (hint: alternators) from most power plants directly provide AC, which is transformed and transmitted over HVAC lines.

[Darus Grey]

I'm surprised that you haven't noticed that those HVDC lines are all underwater.

Yes, you are right that HVDC transmission is more efficient than HVAC transmission, but the difference of that efficiency is determined by the environment of the AC line, because of a capacitative effect. When you have AC power lines surrounded by air/earth those losses are very small.

However, the issue of using DC power lines is the low efficiency of DC voltage transformation. Transforming AC is way more efficient and outweighs the losses of transmitting that power on land based lines.

The losses of HVAC on underwater lines are much higher, and in that case, transforming DC is preferred.



Source or it didn't happen, because that’s just untrue. Generators (hint: alternators) from most power plants directly provide AC, which is transformed and transmitted over HVAC lines.

I noticed, what does it have to do with anything? It was just a convenient picture to show we already use HVDC quite a lot. Obviously because they're not in that picture land and over-head lines don't exist(and are not common)...obviously...what was I thinking?! Anytime we go over 40km(and it's dropping all the time) HVDC becomes more efficient.

I will rescind that "most" power is generated in DC, because looking up various plants does that for me, most newer plants generate in DC(and some like solar *only* generate in DC)...though if a plant is generating AC with their alternators(hint: Generators/Turbines synonyms wat?) then that further reinforces my point about the blatant inefficiency of our power system.

P.S. Source or it DID happen, which once posted, I will dismiss because it's not from Harvard/Yale/etc, and if it is, because that particular group/professor is a "well known" crackpot...not that anyone ever reads them anyways...I could post random blue links all over claiming all kinds of crazy shit and it would take forever to be called out on it, I've seen people get away with that for YEARS...soooo what now? ho ho ho. I think I'll stop before I lose what remaining respect I have for humanity.

P.P.S. Yes I'm just having a shitty day.

[Viena]

/facepalm

I noticed, what does it have to do with anything?

It has everything to do with it. So I should understand your statement as "I know nothing about the physics behind what I'm talking about".

And no, every powerplant based on rotors (hydroelectric, nuclear, gas, coal, solar concentrators), even if it's recent, won't use dynamos (DC generators).

Solar cells generate DC directly, but they are never used for powerplants that have to transmit their power somewhere else, a concentrator would be used instead.

[Darus Grey]

Yes.