Low Head Turbine Testing - Third Attempt
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- เผยแพร่เมื่อ 16 ส.ค. 2021
- T-Shirt: my-store-2f8fb6.creator-sprin... Playtlist: • Langston Low Head Turbine
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The 90 degree bend makes no sense to me, unless the turbine is at the bottom of a large drop in height. That 90 degree bend is a huge restriction in speed from all that mass, while the whole system needs the speed from the mass of the water to be functional. And it looks as if such a small fan, or blade, or turbine, or whatever it is called, is not nearly sufficient enough to produce enough torque in order to produce any usable energy. But it was well worth the try though.
Have you guys ever considered to use an impeller from a water jet or water scooter, or whatever it is called? Those are designed to move large amounts of water real fast, so I assume that a good flow of water can make an impeller move real fast with decent torque as well. It doesn't have to be a new one.
Big thumbs up for doing these experiments, I like to watch them.
Your thumbnail game is improving rapidly
Thank You.
I wish I had a clear shot of it though, I was too distracted to think about a thumbnail picture.
@14:37 Well the rock should have stuck to that spinning object according to the doctrine of gravity anyways, damn I guess there isn't any gravity after all and you just proved it lol.
Interesting to see how a scroll case type input will compare with the straight tube design.
You will indeed get more of a square power increase with additional head, for the reasons you say; that doubling that also doubles the flow.
Those load tester units are kinda cool, I've been using a washing soda variable liquid rheostat and two multimeters, which does essentially exactly the same thing but this is a bit more self contained. Looking them up on eBay tho they seem to be mains powered, how did you manage that by that river?
They are 12vdc powered, I just used my small Energizer power station. The DC ports were shutting off after a timeout because I must not have been drawing enough load so that's why I had it plugged into the AC port.
I've seen a video that has a cage around the entryway up to above the surface of the water to keep fish from going through the turbines. They used a tennis ball inside the cage on the surface that breaks the vortex. Unfortunately, i can't find the video again, but it's a good idea.
That video was filmed I think in the Middle East👀👍👍
I found the video again, and it's from the land to house channel here on yt. Here's the link:
th-cam.com/video/V82SVeVXKcA/w-d-xo.html
@@falessan yeah, I was about yo say that I know Seth (of Land to House) has mentioned that exact setup. I couldn't quite remember if I'd seen one too, mind. Seems like a good idea here, IF you wanted it to be a long-term installation
17:57 It's a DMPPT, a digital* maximum power point tracking. 😂
*Digitus is latin and means "finger".
Pretty sure you need a closed pipe with both ends immersed to get the max siphon effect. Just drop a tennis ball near the inlet and it will get sucked into and disrupt the vortex to keep air out. Also, tape the joints that aren't glued to exclude air from entering.
Congrats on the baby! Thank you for mentioning the Patreon, thats not something you do often enough. :D
Sure thing! Your contributions help with buying instrumentation.
Congrats on the Baby! Awesome video as always
Thank You.
Your job is amazing my friend
Congrats on the baby
I would guess the open tee and the loose joint onto the supply pipe, admit air on the inlet and the vertical outpipe being in the water is an obstruction to the free exhaust of the used water.
You should put the generator on the top of the suction pipe, it will be many times more powerful
Lol!! Just enough to compete with my blackberry USB charger adapter...
But who cares!!! Free power!
On this channel we deal only with USB-levels of POWER!
Hi Joe, maybe you could try using a funnel at the beginning of the tube?
Yes a funnel would help at higher flow rates, the restricted flow due to the turbine isn't enough to benefit from a funnel.
Word of advice to your friend... "low head" translates "large format". You're simply not going to make anything even remotely efficient with a 3" or 8" impeller for a low head application. You don't have the pressure required to make up for the density losses of something that small. As your flow closes on the axis, efficiency decreases dramatically. This is why pelton wheels focus on applying the force at the outermost cross-section. With low-head/low-pressure, you don't have the prerequisite pressure to drive such a small cross-section, so you need a design with more working volume.
An archimedes screw type impeller is easy to fabricate... but the efficiency is still considerably low. On the flip side, they're low maintenance and can handle a broad range of flow, which is beneficial for these small streams that are subject to huge variations with runoff.
As far as homebrew options go... there's no shame in taking a design note from the big guys. Check out GovDeals or some other place where you can find municipal slavage sales, and rob the impeller from a large scale centrifugal pump.
Either way... messing around with turbocharger parts for low head applications is a huge waste of time and resources. Even the largest truck turbos have a throat less than 100mm. To find anything larger, you'd have to get into supremely expensive marine chargers... where even trashed salvage units can easily cost upwards of 6 or $7,000 just for the housing.
Pour stopper le vortex, j ai vu un système d un. Gars tout bête, il a fait un cylindre en grillage a l entrée tu tuyau d évacuation, qui depace le niveau d eau, puis a mis une ou 2 balles en plastique, dès qu'un vortex s amorçait, la balle était attirée par celui-ci, et stoppait le vortex comme vous l avez fait avec votre main 😉
I caught those subtle jokes. Good times. Looking forward to the next video with three times as much suck!
when dealing with creek water and pipes things can get dirty.
I'm looking at a river, to drive power you need to have a wheel with the water flowing underneath then if its wide enough & doesn't pic up rubbish I feel its the best to drive power, you probably need to consider narrowing the water flow to the wheel, anything like that is definitely not a play area for children because of the size of the wheel & power
Do u sell the plastic kaplan turbines..??
Here is one for user engagement. Thanks? 😊
observations. the only thing that does not suck in this turbine design is the pma.
New camera/lens? Your piece to camera at the start/end has some 👌 depth of field, I think your last video had it as well.
Same camera and lens (a stock EOS M6 mk1) but a different arrangement.
Try a wire produce rack from an old fridge and a tennis ball to kill the vortex
Sounds like the bearings are Rusty
Yeah they are! Still free spinning though
Can you randomly tell me how much power in watts can i produce with a height of 20 feet and flow rate is 30 gallons per minute. The distance is long and i have planned to use a petrol generator's dynamo and make a pelton turbine for it.
About 50W assuming 50% efficiency.
@@JoeMalovich i was thinking of 1000 watts.
@@ajmalmaad4497 just google hydro electric power calculator and you can play around with this by yourself.
for 1000W you would need a flow rate of 10 gallons per second at 20 feet or given your flow rate you would need a 360 feet drop
@@Pixelplanet5 so i checked the flow rate and it is lucky 8 gallons a second. I thought one gallon contans 10 litres but its 3.7 litres in one gallon.
On a low head system, where you have a large capacity of water, and not much head pressure, why not insert a unpowered tessla turbine above the generator. Tessla turbines will power themselves given the flow from the water. And increase volume and pressure.
775 is in my area
Next thing to do is fix the leaks in the blower housing. Looks like there's too much gap between the turbine blades and the outlet hole. For max efficiency in impeller pumps (like for PWCs) they run as tight of tolerances as possible. One company got that down to one or two thousandths of an inch with a plastic wear ring sandwiched between the pump housing halves.
With the t open at the bottom you are not getting the benefit of siphon effect, which is most of your power
5 volt 1ampere, c'est là que l'on se rend compte. Que même un tel consomme tant
why don't you try the super high tech vortex killer 🎾or⚽️balls
Didn't think of it at the time but I know what you are talking about.
I have kids I love kids but I think his mom is calling him lol
Wouldn't be a risk of having cavitation downstream the turbine with such a high outflow pipe?
And then the rock dropped into the pipe shattered a few of the turbine fins.
the style of turbine you have been playing with for some time now is never going to give you the results you are looking for there is allwase going to be a lot of energy lost with any turbine try changing your thoughts to kineticenergy
Wonderful video of a child playing around ac voltage IN WATER!!! SOOOOOOOOOO SMART!!!!
Hello joe malovich i new friend from indonesia
Well that bucket certainly was a stupid mistake. Skip to 7:48 right after the bucket gets stuck to avoid wasting your time.
My channel is more about the process than the results.
Thank the good lord for 'fast forward'.....
Keep that kid away from what you are doing, please, and let us concentrate more efficiently.
You are the kind of guy who would yell at a kid having fun on a roller coaster. The kid is learning and engaged with his dad and experimenting.
@@sam-rs8wg That kid could get hurt by getting his fingers on those rotating parts. It is one thing for the kid to watch and another thing to constantly getting in the way.
@@sam-rs8wg Yes I am, kid can learn other places, not at YT bothering watchers.
Isn't it dangerous to have that kid there? He seems very hyper and will touch anything. Never have kids around high voltage and turbines. He even touched the turbine.
Get a job......
Is this a joke?
Yes, because hydro power isn't something useful or in demand.
This is the essence of engineering and science.