Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
You think: Aha! We go: ha, ha.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


                 

Stirling High Altitude Blimp

A high altitude blimp with solar-stirling dishes
  (+8)(+8)
(+8)
  [vote for,
against]

Hopefully not your every day solar blimp.

1. The temperature at an altitude of 20 kilometres is around minus 60° celsius (-76°Fahrenheit). This is chilly.

2. Stirling engines work on temperature differences.

3. Solar stirling engines are heated on one end by a dish which concentrates the sunlight and focuses it on one end, while the other end is cooled off by ambient temperatures [see link].

4. The temperature difference between high altitude and sealevel is around 80° celsius. Quite a bit which the stirling can take advantage of.

5. Build huge solar dish stirling from lightweight material. > put dish into a lightweight transparent plastic bulb, which is filled with helium, and acts as a lifting medium. > lift fuselage with electric engine powered by solar dish. > at night, store excess energy in hydrogen, or in a thermal battery or something like that.

6. At our altitude there are no clouds; you capture the sun from dawn to dusk.

7. It looks very strange. I made a drawing [see link].

Could be used for telecom-blimps and such.

Could be quite efficient maybe!

django, Feb 14 2006

Solar dish stirling http://www.stirling...astirlingengine.htm
Interesting concept, supposedly very efficient, one company which is building huge tens of square miles with this, claims efficiency of 26-30%, much better than ordinary solar panels. [django, Feb 14 2006]

Bizarre blimp drawing http://i3.photobuck...l/stirlingblimp.jpg
It looks spacey!! [django, Feb 14 2006]

Inflatable solar concentrator dish http://www.grc.nasa.../inflatable_srs.jpg
For deep space stirling applications. [django, Feb 15 2006]

Please log in.
If you're not logged in, you can see what this page looks like, but you will not be able to add anything.
Short name, e.g., Bob's Coffee
Destination URL. E.g., https://www.coffee.com/
Description (displayed with the short name and URL.)






       Very creative. Have a bun.
MikeOxbig, Feb 14 2006
  

       or two.   

       Your form factor is stunning, though I suspect not one the engineers would settle on. The basic idea makes a great deal of sense though. [+]
wagster, Feb 15 2006
  

       O Mein Gott! I have just found an ultra-light weight inflatable solar concentrator developed by NASA for a stirling dish engine in deep space. [see link]   

       In my blimp, we will fill this mirror with helium too, creating even more lift!!
django, Feb 15 2006
  

       Utterly gorgeous illustration and good thinking utilising the temperature difference. [+]   

       If you can shape your envelope so that it inflates into a parabola or parabolic trough when at the desired altitude, you could line that with mylar and do away with the separate dish.
BunsenHoneydew, Jul 28 2006
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle