High Altitude Platform: Power Requirements

[alikim]

TL;DR

I have a platform 10x10 m footprint, 15 m height, I need it to permanently float at about 10km, doesn't need to navigate. That volume can have some tech like balloons, batteries, propellers, solar panels etc. What is the power req for this could be?

How would I approach this task:
I have a platform 10x10 meters footprint, 15 meters height, I need it to permanently float at about 10km, doesn't need to navigate/steer.
That volume can contain some tech inside like balloons, batteries, propellers, solar panels etc.
What is the power requirement for this could be?
Thank you!

 

[Baluncore]

How much does it weigh ?
Is it licensed as an aircraft ?
How will you avoid all the other aircraft up there ?
Are you aware that the winds at 10 km can be 300 km/h ?
Are you aware that the temperature at 10 km is a steady -67°C ?

It is less windy at 20 km, and there are fewer aircraft.
https://en.wikipedia.org/wiki/Loon_LLC
https://flightaware.com/live/flight/HBAL

 

[alikim]

How much does it weigh ?

It needs to support its own weight with w/e tech it uses.

Is it licensed as an aircraft ?
How will you avoid all the other aircraft up there ?

Doesn't matter, consider it's above an area that doesn't have any air traffic.

Are you aware that the temperature at 10 km is a steady -67°C ?

Yes, so the tech the platform uses need to function at this temperature.

Are you aware that the winds at 10 km can be 300 km/h ?

No, let assume there is no wind, also no meteor showers, solar flares, falling space debris etc.

It is less windy at 20 km, and there are fewer aircraft.

The higher the better but not in space in case you ask, let's limit it to 20km.

-- I'm asking about power estimate --

 

[Baluncore]

It needs to support its own weight with w/e tech it uses.

-- I'm asking about power estimate --

Then you must specify the total weight.

 

[berkeman]

-- I'm asking about power estimate --

Why are you being so obtuse in your problem statement? Is this part of some school project? Why don't you just use a big Weather Balloon to lift your light poofey payload and be done with it?

Touchdown! NASA’s Football Stadium-sized Scientific Balloon Takes Flight​

https://www.nasa.gov/sites/default/files/thumbnails/image/60mcf2.jpg

 

[Vanadium 50]

Why are you being so obtuse in your problem statement?

It needs to support its own weight with w/e tech it uses.

Easy. Make it out of air!

(Now, if that doesn't "count", please specify the problem rather than make us guess)