Posted by daestrom on March 12, 2005, 7:10 pm
> There "incredibly smal head" mans at least 10 feet high.
For an 'overshot' wheel, yes. But an 'undershot' wheel can work with less
(as little as 3-5 feet).
Wheels are usually much less efficient than a proper turbine design. But
they do have a certain appeal.
daestrom
Posted by Drew Cutter on March 12, 2005, 7:23 pm
What do you think of the Fourney turbine / waterwheel combination ?
Posted by Drew Cutter on March 12, 2005, 7:25 pm
What do you think of the Fourneyron turbine / waterwheel combination ?
Posted by George Ghio on March 14, 2005, 3:05 am
> I need some help figuring out what type of micro hydro system I need and
> which mfg. to go with . Thanks. To be used for the house.
This is how it is worked out. Put your numbers in and work it out. You
will either have enough energy in the water supply or not.
If the energy is not there better to find out before you spend up big.
Example
Site Specifications
Flow Rate = 10 Litres per second
Gross Head = 30 Metres
Allowable Head Loss = 5 %
Micro Hydro Efficiency = 60 %
So
Allowable head loss = 30 X.05
= 1.5 Metres
Net Head = Gross head minus Head losses
= 30 - 1.5
= 28.5
Power Out ofput of Micro Hydro Gen = Flow rate(L/s) X h (net headin
metres) X g(9.8M/s) XEfficiency of the Micro Hydre Gen.
10 X 28.5 X 9.8 X .06 = 1.68kW
Daily Energe Output = 1.68kW X 24 = 40.3 kWh
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