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  1. Originally posted by yeah:[..]

    Where did you get that from?
    a modern windmill needs 2-6 months till the factor of Energy Returned On Energy Invested is bigger than 1.


    Hmm thats lot less then my professor said a year or two ago. Think the truth is somewhere in between.
  2. yep, it's probably between months and years - depends on what source you use (I took wikipedia, not really scientific, I know)
    But the assumption that there is no energetic amortisation for windmills is based on studies from the 70s. Modern windmills are another story.
  3. I dont doubt it, just expected a higher number. I wouldnt be surprised if the professor tried to shock us. That was the whole intention of the course. We need to improve efficienct by factor 5 to have enough energy in 2050.

    The cost of energy is still high for windmills though ~ €0.09 / KWh instead of ~ €0.04
  4. I heard something about some japanese scientists who wanted to put solar panels on the moon. Would be a lot more effective and could easily provide for us all. No atmosphere in the way up there
  5. Cant see that happening anytime soon Especially since most space programs are idle.
  6. Originally posted by Risto:I dont doubt it, just expected a higher number. I wouldnt be surprised if the professor tried to shock us. That was the whole intention of the course. We need to improve efficienct by factor 5 to have enough energy in 2050.

    The cost of energy is still high for windmills though ~ €0.09 / KWh instead of ~ €0.04


    yep, the costs are higher (even though the costs for the depository for nuclear waste aren't included in the latter figure), windmills produce noise, might have an effect on the climate, etc...

    it's certainly not the holy grail - I just wanted to be the smartass who corrects that initial quote I used.

    Besides, I heard Obama supports windmills, so they're part of the leftie nazicomunnist conspiracy anyway.
  7. Its not an easy problem Its just like politics, we can all bitch and nobody is right

  8. the only certain thing


    not much agree with this general statement (i dont mean you're not right in this particular case)

    anyway about the "official" numbers all i can say it's they're just what they want us to know

  9. Poor japanese people.

    First, a brutal earthquake. Then a tsunami. Then a nuclear disaster. And now tons of snow and cold which is making even it all harder:

  10. Me and Yogi agreeing? Wow.
  11. welcome to another war...
  12. War started days ago
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