Okay, so I get it.. the whole point of this math exercise is to point out how unlikely it is for turbines in the gutters to produce viable electricity production..
that being said... there must be some situation at which it does become viable.. so then what is that situation?
Since there's a lot of debate on the theoretical numbers here, and no one formula.. it becomes harder to figure out which numbers to plug in where.
So, lets take a real world example...
9,000 sq. ft. roof - average yearly rainfall about 42" - six 3" or 4" interior drainpipes, a solid enough building (poured concrete) strong enough to hold a significant amount of cached water on an upper floor. A drop in the drainpipes of at least 85'. If one wanted to, one could even hook up each of the drainpipes so that two go into one, three go into one... or even all six into one so that the volume of water, etc. is greater..
Would this be more viable if you had more square footage of roof? 15,000? 20,000? 100,000? At what point does it become feasible? Or is there a need for better, or cheaper technology?
