rexspex

Cool Concept!

Nope, in space/low grav you would still have the friction between the water molecules. Additionally, in space/low grav the water would want to clump.

I am doubtful that this scales. Main concern is the cost in materials, fuel, and electricity in manufacturing large lenses. Sure, it seems that there are large increases in efficiency when generating hydrogen.. But not really once you take into account the cost of generating the infrared.