main issue here is the generator... the load. what you are seeing is jacobs law. theres the resistance of the generator itself, and the same current in the resistor must flow through the generator windings... being a brushed DC motor with commutator losses doesnt help things... theres an ideal load for any generator. you find that any generator has an ideal speed. so does a turbine. as a pelton, you are extracting the maximum work form the water if the wheel is spinning at half the speed of the water. if its slower, its overloaded. if its faster, its underloaded. any splashing is a loss, water should fall "dead" from the buckets. any that continues around takes energy to spin, etc, etc... but, at the ideal speed of the turbine, is the generator capable of loading the turbine to get that power out? can the generator deliver that power to a load at that speed? if you want to test the turbine, you need to dyno it... measure the torque on the generator with a load cell through various load resistances. not voltsxamps consumed in a resistance. its the wrong measurement... because the same current that flows through that resistance also flows through the generator itself. as a brake, you can measure the torque due to current flow from a short to an open circuit, and that is the true power being produced/converted. whats in the resistor is only the portion of power dissipated in the resistor... not the total energy! if you want to test the generator, then you have to spin it and do much the same... how many watts as torque over time are actually converted to volts x amps in any given load? what is the ideal load? theres more to it than grabbing any old motor, resistor, and wheel and throwing them together, but its not that complex, really? just have to match things, alter certain parameters to suit each application...
I would try to use a brushless Motor, the flat ones for big drones with very low kv rating and a rectifier. With low voltage like in your case, its important to use shotky diodes with a low pass thrue voltage. Using a BL motor you might get away without a belt, so you can save those losses as well. And with a constantly variable load you can try to aim for the point of maximum power.
Did you measure the water flow and pressure getting to the turbine to calculate actual efficiency? Given that you do not use any sort of MPPT I would assume it to be somewhat bad.
To make power from a stream or river in the future. This is the testing stage and if you've seen my other videos, then you'd realize how important it has been. Thanks for watching
@@Beyond_The_Tint I would suggest then using another turbine. Since you have a 3D printer available, other designs shouldn't be hard to make, and they can be much more efficient than the pelton turbine
@@Beyond_The_Tint Tesla turbines, impulse turbines, francis turbines for higher flow, archimedean turbines, etc. I prefer the tesla turbine, as it seems to have big potential, but it needs a bit of design making to be really good. Pelton turbines can be efficient, but they seem to need a huge head to have large efficiency, something not found in small rivers
Nice videos od micro hidro power plant :) ...i think you need Moore voltage at least 13.6 to charge a 12v battery ....with 1inch pipe one nozzle i get on 4.5 bar a current of 2.9 and 13.6V about 40watts...
It's crazy to think this has been 2 years in the making. It's only made it this far because of you!
main issue here is the generator... the load.
what you are seeing is jacobs law.
theres the resistance of the generator itself, and the same current in the resistor must flow through the generator windings... being a brushed DC motor with commutator losses doesnt help things...
theres an ideal load for any generator. you find that any generator has an ideal speed. so does a turbine.
as a pelton, you are extracting the maximum work form the water if the wheel is spinning at half the speed of the water. if its slower, its overloaded. if its faster, its underloaded. any splashing is a loss, water should fall "dead" from the buckets. any that continues around takes energy to spin, etc, etc...
but, at the ideal speed of the turbine, is the generator capable of loading the turbine to get that power out? can the generator deliver that power to a load at that speed?
if you want to test the turbine, you need to dyno it... measure the torque on the generator with a load cell through various load resistances. not voltsxamps consumed in a resistance. its the wrong measurement... because the same current that flows through that resistance also flows through the generator itself. as a brake, you can measure the torque due to current flow from a short to an open circuit, and that is the true power being produced/converted. whats in the resistor is only the portion of power dissipated in the resistor... not the total energy!
if you want to test the generator, then you have to spin it and do much the same... how many watts as torque over time are actually converted to volts x amps in any given load? what is the ideal load?
theres more to it than grabbing any old motor, resistor, and wheel and throwing them together, but its not that complex, really? just have to match things, alter certain parameters to suit each application...
Thank you for taking the time to explain this! I will try and make a video to test as you stated
I would try to use a brushless Motor, the flat ones for big drones with very low kv rating and a rectifier. With low voltage like in your case, its important to use shotky diodes with a low pass thrue voltage. Using a BL motor you might get away without a belt, so you can save those losses as well. And with a constantly variable load you can try to aim for the point of maximum power.
I'll have to add it to the list, thank you for this advice
Did you measure the water flow and pressure getting to the turbine to calculate actual efficiency? Given that you do not use any sort of MPPT I would assume it to be somewhat bad.
Now that you mention it, I did not but will add this into next vid
Hi Is it possible to get the 3D files to test your turbine? JEFF
I've been thinking about releasing them, I should have more details on this soon.
i am trying really hard to figure out the point of it other than just a toy to play with..
To make power from a stream or river in the future. This is the testing stage and if you've seen my other videos, then you'd realize how important it has been. Thanks for watching
@@Beyond_The_Tint I would suggest then using another turbine. Since you have a 3D printer available, other designs shouldn't be hard to make, and they can be much more efficient than the pelton turbine
@@giovannicesaramorim9adigan961 do you have any specific turbines in mind?
@@Beyond_The_Tint Tesla turbines, impulse turbines, francis turbines for higher flow, archimedean turbines, etc. I prefer the tesla turbine, as it seems to have big potential, but it needs a bit of design making to be really good. Pelton turbines can be efficient, but they seem to need a huge head to have large efficiency, something not found in small rivers
Nice videos od micro hidro power plant :) ...i think you need Moore voltage at least 13.6 to charge a 12v battery ....with 1inch pipe one nozzle i get on 4.5 bar a current of 2.9 and 13.6V about 40watts...
ruclips.net/user/shortsy5XzSz0hGL4?feature=shared
Have you calculated the buckets for specific amount of water ? If so thats good
Yes you are correct, I want to hook up a charge controller one I can consistently stay above 13.6v. Impressive numbers tho!
I haven't maybe I'll make a video on this and it's total potential power
A label to read must be very hard .... 🤣🤣🤣
If your referring to the one on the motor, I have the same exact motor labeled as a 350w. Thanks for adding something of value to this...