Author Topic: The Tech Forum  (Read 43810 times)

chaotic neutral observer

  • Groucho Marxist
  • Deserved It
  • ****
  • Posts: 1100
  • I saw what you did and I'm okay with it
    • View Profile
Re: The Tech Forum
« Reply #45 on: September 13, 2019, 01:09:36 pm »
This type of generator is interesting at a theoretical level, but I don't see it being very practical.
The researchers currently report 25 mW/m2, and think they can improve to 0.5 W/m2.  In comparison, a solar panel can give you 200 W/m2.

And, as with solar panels, this technology requires a clear sky. If it is overcast, the sky temperature will be higher, and reduce the available temperature difference. This approach requires the ground to be warmer than the sky to work.
Desine fata deum flecti sperare precando.

Brother Mythos

  • Outlandish
  • ***
  • Posts: 909
    • View Profile
Re: The Tech Forum
« Reply #46 on: September 13, 2019, 02:30:45 pm »
True, the power generation is not impressive. But, I do find the technology interesting.

This article caught my eye because I remember well the big industrial search, of years ago, for energy to be harvested from waste heat.

Faust

  • Tyrannical Overlord
  • Deserved It
  • *
  • Posts: 10328
  • The Greasy Strangler
    • View Profile
Re: The Tech Forum
« Reply #47 on: September 13, 2019, 02:42:36 pm »
Solar Panels require some rare materials. If this is just simple LED diode it could have applications in power scavenging or when doing it over long empty distances like empty highway regions
Sleepless nights at the chateau

chaotic neutral observer

  • Groucho Marxist
  • Deserved It
  • ****
  • Posts: 1100
  • I saw what you did and I'm okay with it
    • View Profile
Re: The Tech Forum
« Reply #48 on: September 13, 2019, 03:28:36 pm »
Solar Panels require some rare materials. If this is just simple LED diode it could have applications in power scavenging or when doing it over long empty distances like empty highway regions
Today, you can get a 25 mW (rated) solar cell that measures under 2 cm2 for $2.57 (in quantity).
500 mW brings that up to ~$10.

Even if you consider that the actual power out of these solar cells is likely to be below the rating, I would say the cold sky thermoelectric approach is optimistically a couple of orders of magnitude behind the point where it would be competitive.

RTG's are only viable because there is a huge temperature difference involved.
Desine fata deum flecti sperare precando.

altered

  • Reluctant Mad Prophet of Mushussu Qudmu
  • Deserved It
  • ****
  • Posts: 2263
  • Beggar-Knight of Eris Militant
    • View Profile
Re: The Tech Forum
« Reply #49 on: September 13, 2019, 04:33:10 pm »
This is ridiculous. I have no idea how it can possibly work. I fucking love it.
“I am that worst of all type of criminal...I cannot bring myself to do what you tell me, because you told me.”

“Ever watch that famous war movie? That’s how it’ll be.”
“Which one?”
“The one where everybody dies.”
— Blood Standard, Laird Barron

Remember the fall of Yin Tu.