Revolutionary watermill?

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
jean.caissepas
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Revolutionary watermill?




by jean.caissepas » 19/12/16, 12:19

Using the vortex effect, with 1m of vertical drop only, for 4 fireplaces ...

Link : http://dailygeekshow.com/moulin-eau-turbulent/

To be continued...
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Re: Revolutionary water mill?




by Christophe » 19/12/16, 17:16

Moué ... the limit of Betz is also valid in hydraulics ... and to provide enough energy on 1m fall means a fairly large flow ...

Potential power in watts (= what one can hope to recover to the maximum with an installation efficiency of 100%) = Q * rho * 9.81 * h with rho = 1000 kg / m3, h = height of fall in m and Q flow rate in m3 / s say Pu = 10000Qh

If h = 1, then we have Pu = 10000Q

Below 1m3 / s (where we would get Pu = 10000W is roughly 5000W with a global yield of 50%: 60% for the turbine, 90% for the alternator), I do not think the installation is interesting ...

FYI the flow of the Rhine is in order of magnitude (varies according to the season of course) of 2000 m3 / s that of the Loire 800 m3 / s.
So 1m3 / s is already a beautiful river ...

Otherwise, it looks like a Kaplan turbine (can be a bit optimized ...)
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Re: Revolutionary water mill?




by chatelot16 » 21/12/16, 18:06

Christophe wrote:Moué ... the limit of Betz is also valid in hydraulics ...

no !

the limit of betz concerns the wind turbine, because the wind has the freedom to circumvent the wind turbine ... if the wind turbine does not slow down the wind it does not take power, if it slows too much the wind, all the wind the bypasses and it does not produce much ... a good wind turbine just finds the right compromise that is calculated by betz

the limit of betz is also explained to the tidal turbines which are placed in the current without dam

when there is a dam we are sure we can pass all the flow in the turbine or the wheel! the betz limit does not apply ... the maximum yield possible is close to 100% ... for a long time the wise wheel has given 90% of yield!

there is a multitude of wheel and turbine type whose performance is not necessarily very good, but it is an economical calculation to make: the wheel wise rotates at a very low speed, it must be huge for its power so expensive has build ... there are a multitude of turbine types that yield less but are smaller and more economical and more cost effective
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Re: Revolutionary water mill?




by Christophe » 22/12/16, 03:46

Really? :P :P :P
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