I recently entered into a conceptually technical contest called "Create the Future" (https://contest.techbriefs.com/). My submission is entitled "Solar Silo". To view full images right click and select view image, their 'view full image' is a little wonky. In order to vote, you must register. Although the site is sponsored by commercial entities your email inbox will NOT be inundated with ads. To find 'my' submission (on the 'Create the Future' home page) select '2019 Entrants' (to the left and down), find my name, under my name is Solar Silo, click on Solar Silo. I am grateful for all votes cast for my submission. Even without voting for any submission the 'Create the Future' site is well worth visiting.
The Create the Future Design Contest was launched in 2002 by the publishers of NASA Tech Briefs magazine to help stimulate and reward engineering innovation. The annual event has attracted more than 8,000 product design ideas from engineers, entrepreneurs, and students worldwide.