Devon Olsen wrote:
in the bottom video he was gettin approximately 6.5v out of 800F i think, thats what i got from it anyway, so if a RMH got to 800F, which would be a very low temp for a RMH i would think,
so at 6.5 watts per second at 800F, you have 390 watts per minute and 23400 watts per hour, if you produce that steadily you are getting 561,600 watts from 24 hours
to convert this to volts you use the formula W/Amps=V
for shits and giggles because i know nothing about amperage really lets go with 30 Amps
so in a 24 hour period at 800F you would produce, with the same set up he had, 561,600/30 = 18,720 volts, i am assuming it only takes 12 volts to charge a 12v batterly so that is a lot of volts, i think i may have fucked that up somewhere along the way
also keep in mind that the numbers here are based off of a blow torch and an ice-water bath so a little different numbers to be sure and the wider gap in temperatures the more electricity you would produce, ideally, your low temperature would be 70F in the greenhouse during the winter and the high temp would be the RMH, so like 1100F? about a 1000 degree temp difference for producing electricity...
Roy Clarke wrote:http://www.ecofan.co.uk/ here is a ready made fan
tel jetson wrote:...... in order for these things to work at the very low current created, parts have to be very light weight and so they're quite delicate. I wouldn't want to rely on one.
Roy Clarke wrote:I think that's the main point with these fans, very low power in means very low air moving out. I have a Stirling engine type, also low power. IMO they are a waste of money and are a placebo. The air movement created by the convection of the stove is way greater than the fan, and not having the fan going produces no noticeable difference.