> LED light is so cheap we might be growing everything inside soon. > 24 hours a day.
I'm not a grid expert, but I don't think the numbers add up for that. For a single user, I could get a 5kw solar system for $10k It will be ~400 square feet of panels at ~25% efficiency. meaning it generates the power equivalent to 100 sq feet of natural sun. That's a 10 foot by 10 foot herb garden, and it cost $10k to grow indoors. Probably cheaper to plant it on the roof and use natural sunlight free. As for feeding everyone: One estimate is that it takes about 1 acre to grow food for a person per year. That's 300 million acres. 3 acres of solar generators put out about 1gwh of electricity per year. assume 25% efficiency for easy calculations/estimations. That's 400 million-gillion watt hours of energy. 400 peta-watt hours. Which I think is like, all the coal on the planet. I believe the total us electrical consumption is 4pwh a year. Greg On Sat, April 1, 2017 11:10 am, Kurt Keville wrote: > I think the OpenAG initiative is really ambitious. Publishing everything > in ODF format... releasing their sensor designs, etc. Their numbers > indicate a big increase in crop yield. LED light is so cheap we might be > growing everything inside soon. 24 hours a day. They are already doing it > in the basement of many NYC restaurants. > > BTW, did you see this? > http://somervilledynamics.com/PGPcopter.htm > > > > On Sat, Apr 1, 2017, 10:05 AM Stephen Ronan <sro...@gmail.com> wrote: > > >> Went to the Gershoff Symposium yesterday at Tufts >> https://nutrition.tufts.edu/event/2017-03-31/annual-gershoff-symposium >> Found the talks by Isha Datar, who is a Shuttleworth Fellow, >> https://www.shuttleworthfoundation.org/fellows/ >> and Caleb Harper of the MIT media lab's open agriculture project >> https://www.media.mit.edu/groups/open-agriculture-openag/overview/ >> especially interesting... There are plenty of extended talks by each them >> on Youtube that cover all the same material... Here are a couple of >> much shorter pieces that offer some highlights of their work. Isha Datar >> https://www.youtube.com/watch?v=l9DPaa9rssg >> Caleb Harper >> https://www.youtube.com/watch?v=8YI569T0AMk >> _______________________________________________ >> Hardwarehacking mailing list >> Hardwarehacking@blu.org >> http://lists.blu.org/mailman/listinfo/hardwarehacking >> >> > _______________________________________________ > Hardwarehacking mailing list > Hardwarehacking@blu.org > http://lists.blu.org/mailman/listinfo/hardwarehacking > > -- _______________________________________________ Hardwarehacking mailing list Hardwarehacking@blu.org http://lists.blu.org/mailman/listinfo/hardwarehacking