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by zackmorris
4053 days ago
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Similar to the windbelt: http://www.instructables.com/id/Windbelt-Redux--21st-Century... Fluids tend to move as vortices so often reciprocating motion can be at least as efficient as rotary motion. For example it is (currently) difficult to replicate the efficiency of birds and fish with propellers. Potentially (ahem) it's possible to extract work from ions in a flow, and if it's laminar there would be no vortex losses. Just for fun, here is an electrostatic turbine, which works a bit like an electrohydrodynamic (EHD) drive but in reverse. From what I understand, it's difficult to extract more work than it takes to ionize the fluid, so this cheats a bit by using liquid droplets: http://www.wired.co.uk/news/archive/2013-04/3/bladeless-wind... |
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