Unusual design of a free-flow hydropower station

[Hydro]

In my opinion this is another article of the same autor.
It seems to me that there is a different address there.

Please provide the author or journal or DOI or contact details for the following article:

https://www.eevblog.com/forum/chat/unusual-design-of-a-free-flow-hydropower-station/msg5299339/#msg5299339

As far as I know, this calculation is posted on arXiv. It doesn't have any DOI.

I repeat - we are not in a scientific journal.
If only these formulas were written on a napkin in a restaurant. Can you refute them?

[Hydro]

If you see some illogical conclusions and claims, then I can try to answer them as I understand it.

The original video has the description: "Безплотинная Мини-ГЭС Линева производит 11 кВт при скорости течения реки 1 м/с" or, in plain English, "damless mini-power station produces 11 kW at flow speed of 1 m/s".

This claim is exaggerated and illogical. I'd love to see your answer.

In my opinion this is bullshit.
Where is this written?

He has other numbers written in his article.

[eutectique]

The original video has the description: "Безплотинная Мини-ГЭС Линева производит 11 кВт при скорости течения реки 1 м/с" or, in plain English, "damless mini-power station produces 11 kW at flow speed of 1 m/s".

In my opinion this is bullshit.
Where is this written?

It is written in the description of the original video on youtube.

[Andy Chee]

In my opinion this is another article of the same autor.
It seems to me that there is a different address there.

Please provide the author or journal or DOI or contact details for the following article:

https://www.eevblog.com/forum/chat/unusual-design-of-a-free-flow-hydropower-station/msg5299339/#msg5299339

As far as I know, this calculation is posted on arXiv. It doesn't have any DOI.

I repeat - we are not in a scientific journal.
If only these formulas were written on a napkin in a restaurant. Can you refute them?

I think you want to steal his idea, which is why you are refusing to provide contact details.  Or you are a lazy researcher.  Or both.

These reasons are why no-one wants to discuss anything with you.

[Hydro]

As far as I know, this calculation is posted on arXiv. It doesn't have any DOI.

I repeat - we are not in a scientific journal.
If only these formulas were written on a napkin in a restaurant. Can you refute them?

I think you want to steal his idea, which is why you are refusing to provide contact details. Or you are a lazy researcher. Or both.

These reasons are why no-one wants to discuss anything with you.

1. How can I steal an idea if it was published in a journal many years ago?

2. The design may be different, but on the same principle. Just as the designs of cars, airplanes, helicopters, ships, etc. can be different. However, the principle was invented long time ago by Carnot, Otto, Diesel, the Wright brothers and others. No one can steal the very idea from them.

3. Contact details of the authors are publicly available. I gave them to you. Although you yourself found them a long time ago (even considering the fact that they are in Serbian). Although you stated that you are not interested his research.

4. I don’t see that no one is discussing anything with me.
Vice versa! They are discussing it, so much smoke is coming out!
It’s just that no one can object to anything on the merits.

[Hydro]

5. anyone who wants to write a peer review should contact the author or the  journal.

I want to contact the author.  Please tell me the author's name or journal.  Or just provide the DOI, which will contain all the required contact information.

Can you tell us about the results of your conversations with the authors?

[eutectique]

He has other numbers written in his article.

169 W of power at 1 rpm is 1600 Nm of torque. How can it be stopped with a bare hand (in the video)?

[Hydro]

He has other numbers written in his article.

169 W of power at 1 rpm is 1600 Nm of torque. How can it be stopped with a bare hand (in the video)?

1. where did you see 1 rpm?

2. how did you calculate 1600 Nm without taking into account the pulley diameter?

3. in this video the operating mode is by no means optimal. The table shows the data in optimal mode.

4. watch this video.
it looks like no one risks sticking their fingers into the pulleys

[eutectique]

2. how did you calculate 1600 Nm without taking into account the pulley diameter?

Do I need to know the pulley diameter to calculate torque from power? Please explain.

[Hydro]

2. how did you calculate 1600 Nm without taking into account the pulley diameter?

Do I need to know the pulley diameter to calculate torque from power? Please explain.

In the same place where you saw 1 rpm.
So where did you see it?

How can you calculate the force applied to a pulley without taking into account its diameter?

[eutectique]

How can you calculate the force applied to a pulley without taking into account its diameter?

I am not calculating force. I am calculating torque.

Now, tell me why do I need to know the diameter to calculate torque from power?

[Hydro]

I'll tell you right after you tell me where you got 1 rpm

[PlainName]

I'll tell you right after you tell me where you got 1 rpm

aka "I don't know"

Otherwise, why is it a secret? Either you know and can tell eutectique or you don't and are deflecting.

[Hydro]

Why don’t I know? I know.
I took this from the same place where he took 1rpm.

so as soon as he answers, you will know my answer

[PlainName]

So if he doesn't answer, why wouldn't you want to explain? Either you can and should be happy to show your expertise, or you can't and just need an excuse to hide that.

[Hydro]

Yes, why don't I answer if he doesn't answer.
My answer is that -  I picked it out of thin air.
I decided to pump him up - but does he understand what he blurted out?

[Hydro]

I think you want to steal his idea, which is why you are refusing to provide contact details.  Or you are a lazy researcher.  Or both.

Has it finally dawned on you that this idea is worth stealing?

But how can you steal something that is already in plain sight?

[pcprogrammer]

Finally the real clown is out of the bag. 

[pcprogrammer]

@Hydro, do you even understand how much energy is 1J/s which is 1W?

According to the table you posted, such a hydropower station of 1m depth produces 3430 Joule per second. This is 3430W and boils down to 0,000952778KWh. Good luck in powering your house with it.

Edit: I overlooked the fact that it is continuous. The small number is just the amount of energy for a single second.

[eutectique]

To reiterate:

169 W of power at 1 rpm is 1600 Nm of torque.

2. how did you calculate 1600 Nm without taking into account the pulley diameter?

The holes in your knowledge of mechanics are profound.

You don't even know the basics.

For your education, $$\tau = \frac{P}{\omega}$$
where $\tau$ is torque, $P$ is instantaneous power, and $\omega$ is angular velocity.

There is no "pulley diameter", or "lever" in the formula.

Distance from the centre of rotation does not matter.

[voltsandjolts]

@Hydro, do you even understand how much energy is 1J/s which is 1W?

According to the table you posted, such a hydropower station of 1m depth produces 3430 Joule per second. This is 3430W and boils down to 0,000952778KWh. Good luck in powering your house with it.

3430 Joules per second = 3430W = 3.430kW
If this continues for one hour, you have generated 3.430kWh

[pcprogrammer]

@Hydro, do you even understand how much energy is 1J/s which is 1W?

According to the table you posted, such a hydropower station of 1m depth produces 3430 Joule per second. This is 3430W and boils down to 0,000952778KWh. Good luck in powering your house with it.

3430 Joules per second = 3430W = 3.430kW
If this continues for one hour, you have generated 3.430kWh

True, and if you only use it for lights and a fridge or so it will suffice. But if you want to run your washing machine simultaneous with your vacuum cleaner, fridge, toaster, microwave, heat pump, etc. it ain't gonna cut it. Our house has a 9KW connection, so I would need three of these "power plants" and a big river nearby. Not possible in the small stream that runs in the fields next to our plot.

As a proper solution for switching to "renewable energy" it is useless due to it being small scale, and impractical for large deployment. Large scale geo thermal might do the trick, but as with everything else, what are the long term consequences.

And on an other note, what would the life expectancy be of such a mechanical structure in a stream powerful enough to drive it. With dirt and it causing erosion I don't expect to long.

[voltsandjolts]

As a proper solution for switching to "renewable energy" it is useless due to it being small scale

I disagree with your assertion that small scale is useless. I would consider a near continuous supply of 3kW from a clean energy source on my own property to be a huge win. It would mean low cost, low carbon hot water supply and lighting. Add battery storage to enable some higher intermittent loads. The incoming mains supply would then be used to power the highest (but short term) loads.

[magic]

Yes, I don't understand what exactly is so bad about having lighting, refrigeration, computers and a few other things running 24/7 for free

[IanB]

Yes, I don't understand what exactly is so bad about having lighting, refrigeration, computers and a few other things running 24/7 for free

It's irrelevant, because you are not going to get any of that from whatever nonsense is being presented in this thread