Space Exploration

Are NASA's future missions and budget justified?

  • It's worth the time and expenditures

    Votes: 223 66.0%

  • Complete waste of money

    Votes: 41 12.1%

  • We need to explore, but not at the current cost

    Votes: 74 21.9%
  • Total voters
    338
#1,503
#1,503
NorthDallas40 said:
Huner I’m an electrical engineer. And at UT we actually had a class on power generation and transmission. And I’ve been doing EE work for 30 years. In short most of the power grids are not conducive to making HVDC affordable due to the expensive costs of the equipment mainly. Look at the post right above yours, it gets down to a “break even” distance. AC wins up to X, DC wins after that. The US is mainly broken up into I believe four major grids largely operating independently. But if you’re on a particular grid you have to phase lock to that grid frequency then you pull power or push power based on your line voltage. I would guess there is an opportunity for the grids to connect via HVDC as it eliminates the synchronization requirement and those could very well be the stations you referenced in one of your posts. 🤷‍♂️

The key enabler for making HVDC viable is transmission over very long distances which you also acknowledge I know,read that as hundreds of miles. However upon receipt it will absolutely be converted back to AC as within a small distribution region AC wins on economic reasons. And that’s the only reason that matters in power generation. So HVDC won’t ever replace our grid(s).
Click to expand...


I never intended to imply that HVDC would replace AC transmission. It does however seem to make sense that in places where electricity is in high demand but are not located near a source of hydroelectric generation or fuel supplies that the cheapest option is HVDC transmission to those areas.

If I have misinterpreted what I read I stand corrected. But that seems to be what other countries are doing successfully.E


Edit: PS Even though I've been watching Chernobyl on HBO I am still in favor of developing nuclear energy.
 
Last edited:
  • Like
Reactions: marcusluvsvols and Mick
#1,504
#1,504
Hunerwadel said:
I never intended to imply that HVDC would replace AC transmission. It does however seem to make sense that in places where electricity is in high demand but are not located near a source of hydroelectric generation or fuel supplies that the cheapest option is HVDC transmission to those areas.

If I have misinterpreted what I read I stand corrected. But that seems to be what other countries are doing successfully.E


Edit: PS Even though I've been watching Chernobyl on HBO I am still in favor of developing nuclear energy.
Click to expand...
Chernobyl is a fantastic show.
 
#1,505
#1,505
Hunerwadel said:
I never intended to imply that HVDC would replace AC transmission. It does however seem to make sense that in places where electricity is in high demand but are not located near a source of hydroelectric generation or fuel supplies that the cheapest option is HVDC transmission to those areas.

If I have misinterpreted what I read I stand corrected. But that seems to be what other countries are doing successfully.E


Edit: PS Even though I've been watching Chernobyl on HBO I am still in favor of developing nuclear energy.
Click to expand...
I may have misinterpreted you as implying HVDC would replace our grid. My bad if I did.

As you said it’s already here in the US it just isn’t prevalent in use mainly due to economics. In the LA power case you had a supplier on the Columbia River feeding a customer in Southern California via a direct connection, not the grid. Ok makes economic sense there. Most customers, even big power users, will just pull of the local grid. They might put in their own substation and pull directly from 230kV to 500kV lines but it’s still local sourced.
 
  • Like
Reactions: marcusluvsvols
#1,514
#1,514
Velo Vol said:
[Logs into NASA 101]

It's Orion, right? Looks like at least two years until a manned mission.

It's been a while.
Click to expand...

SpaceX and Boeing. The Crew Dragon was supposed to go up late this year and Boeing was supposed to have its unmanned test.

At the moment, Dragon has some issues and Boeing is behind schedule.
 
#1,515
#1,515
Thanks for keeping this thread up to date fellas. Always very interested, and refuse to watch MSM news, so i learn everything online and from very few sources. This one is my space source, along with reddit updates where they show video of all the launches etc...reddit/ conservative has good stuff too. Much of what we share and discuss here is there.

Hog i believe made a very good point the other day about IMO2020...almost nobody has that on their radar..if we are still in tarriff wars, trump better order a delay on that or we will go in a recession IMO...too much drag for anyones economy to overcome.
 
#1,518
#1,518
Velo Vol said:
He mad?

I don't think 2024 is going to happen.

What is the target to even get an American back in space?
Click to expand...

If you mean from American soil it was supposed to be this fall. I have yet to see how the SpaceX test accident last month effects the timeline.
 
New posts
You must log in or register to reply here.

VN Store



Back
Top