How to test Passive Solar and Proactive Solar greenhouses? I came up with this idea...

[PyraPOD_com]

This idea spins out since we had a breaking in making PyraPOD by using a CHIMNEY as both the bubble generator and the inner skin. This way we can use ONE layer to cover it and form a double-layer cavity in between. The following video explains the concept:

The following video showing the first stage of this little project - it shows the success of producing a lot of soap bubbles using two HomeDepot pails:

Then the final success - after total filling with soap bubbles, the bubbles are still there after 6 hours (later tests show I still see some bubbles after 10 hours!):

Now the comparative study between two Bubble Lighthouse - one insulated with air only and one with soap bubbles only:

 

[DirtMechanic]

A clear foam. Good idea! UV stability would be interesting, but plastics are foams and polyesters are clear, so too acrylics.