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A home microhydro plant (2009)

ludens.cl

51–60 of 94 posts

Re: A home microhydro plant (2009)

#51
post #43

Of historical interest, it's the sort of thing you might do if you were a Victorian industrial magnate, for some value of "home": https://en.wikipedia.org/wiki/Cragside

Incredible. Basically a "smart house" powered by water, well over a century ago. Gives inspiration that, despite the current cesspool that is the Internet of S$$$, over long enough timespans some of the better inventions (dishwashers, lighting, vacuum cleaners) will stop being "home automation" and just become "home".

Re: A home microhydro plant (2009)

#52

I remember when this was originally posted, and I am still super impressed with him making his own transformers.

It's interesting, as a hobbyist in electronics I tend to see the components I order (inductors, capacitors, etc) as atomic 'units' so watching someone build their own is fascinating. In some ways, it connects what we do abstractly to the concrete reality.

Re: A home microhydro plant (2009)

#53

Earlier quoted context omitted.

line-line potential is 2kV so the wear is worse between conductors. The only saving grace is the current is so low that the wire will see almost no heating which almost eliminates thermal stress.

You are misunderstanding. He runs each wire in a separate, sealed insulating cable pipe. These would most likely be 1-1.5 mm wall thickness PVC.

Am I right then in assuming each wire's insulator provides 600V isolation so two side-by-side would provide 1200V isolation, and the PVC is additional on top of that?

Re: A home microhydro plant (2009)

#54

Earlier quoted context omitted.

In what way? The digging? Or the water? It seemed he only uses a very little bit of the available water.

At some point he was using 2/3 of the creek.

For a short stretch. The water goes back in at the end. It's a completely environmentally sustainable system.

Re: A home microhydro plant (2009)

#55

I remember when this was originally posted, and I am still super impressed with him making his own transformers.

I built a transformer once, for some high-school project, and while it wasn't anywhere near the quality of the commercial ones, it worked. It's actually not that hard if you have the right tools and a basic design that you can copy - it just takes some precision and patience. I definitely encourage you to try it sometimes if you're interested in electronics...

Re: A home microhydro plant (2009)

#56
post #48
post #10

How much would all this cost in 2019? I'm wondering because I see many more people turn towards solar panels, or alternatively windmills. First time I see a hydro plant of this size.

The author mentions solar in a later post: > Another restriction is that there is no power at this place. Bringing power here would require a 350 meter long transmission line through dense forest, or else installing a solar panel, battery and regulator. Due to the low head available between the intake dam and the forebay, a picohydro system to provide some power is hardly feasible. Solar power is quite restricted too…

I remember hearing this is a (common) misconception, and that solar panels will still be at somewhere around 50% efficiency even under heavy clouds. Maybe they weren't as efficient yet back in 2009.

Re: A home microhydro plant (2009)

#58
post #25

Earlier quoted context omitted.

It looks like a good way to ruin an entire ecosystem.

Running water through pipes is going to destroy the surrounding forests how exactly? It might modify where the wetter parts of the area are, but I don't think that equates to destroying it.

As the article says, it diverts most of the flow during low-flow periods (i.e. summer) which means there would not be much left for fish passage. Might be fine, might not, I don't know enough about the ecosystem to say.

Additionally, there are some definite issues with sedimentation during construction. They excavated the channel to the intake and put all the dirt from the excavation into the stream for it to "carry away"[1]. This would not be allowed in most areas I know of - essentially, fish can't breathe if there's too much dirt in the water. Then several times it overflowed and eroded the channel - more sedimentation. The author even admitted using concrete liner would be the better choice, but opted not to because it was expensive - essentially, this externalized the cost of sedimentation to the ecosystem.

[1] https://ludens.cl/paradise/turbine/intake.html

Re: A home microhydro plant (2009)

#59

There’s a very cool hydro system built over a few years by a YouTuber called ‘Mr HydroHead’ over a bunch of videos spanning several years - the first here: https://m.youtube.com/watch?v=edEhvmNlYqk Pretty impressive how much power these things can produce!

Came here to post same series!

If you don't want to watch 19 episodes spanning a few years, he put up three summary videos of the project starting at episode 20: https://www.youtube.com/watch?v=61lZn1sUkzE

Re: A home microhydro plant (2009)

#60
post #34

Earlier quoted context omitted.

Running water through pipes is going to destroy the surrounding forests how exactly? It might modify where the wetter parts of the area are, but I don't think that equates to destroying it.

There's more to water than forests. For example invertebrates, which play a key role in an ecosystem. Next time thing before you talk.

Your last two comments have been personal attacks, and we had to warn you about this before: https://news.ycombinator.com/item?id=18096897. If you continue to post like this to HN, we are going to ban you. I don't want to do that, so would you mind reviewing the site guidelines and taking the spirit of this site more to heart when posting here?

It's not primarily a moral or ethical thing. We're just trying to prevent this place from burning itself to the ground. That requires everyone to have a certain discipline with their angrier impulses here.

https://news.ycombinator.com/newsguidelines.html

(Your comment would be just fine without the last sentence.)

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