Page 1 of 1

Don't we all wish we had this on our property

Posted: Jul 17 2020 7:27pm
by John in CR
A new friend who want my help building a high powered ebike is also working on a hydroelectric project on his dairy farm that has an electric bill of over $1000/mo. It's up in the mountains at 4,000m of elevation and he has a small river with year-round flow and a whopping 200m of head :shock: . Even with just a 3" pipe he can produce an incredible amount of electricity at the 400gal/hr rate he is planning.

Hopefully he can negotiate a grid tie arrangement where he gets paid for the excess he generates.

Re: Don't we all wish we had this on our property

Posted: Jul 18 2020 11:32am
by john61ct
very nice!

no spawning fish to accommodate?

Re: Don't we all wish we had this on our property

Posted: Jul 19 2020 12:11am
by Hillhater
ES member “craneplaneguy” has reported on his “mini hydro” system for several years. Avery nice to have facility.
Another member ( ? Aussie ? Forget name) has also reported on his DIY mini hydro working with limited head, but continuously outputting 1+kw to a large Pb bank, and also to a experimental “pumped hydro” tank system for storage.
Ideal if you have the land , water, and terrain to enable such a system.

Re: Don't we all wish we had this on our property

Posted: Jul 21 2020 3:48am
by John in CR
john61ct wrote:
Jul 18 2020 11:32am
very nice!

no spawning fish to accommodate?
He does have some trout ponds fed with a continuous flow from the river, but no migratory fish to worry about.

Re: Don't we all wish we had this on our property

Posted: Sep 13 2020 3:03pm
by 999zip999
What voltage ?

Re: Don't we all wish we had this on our property

Posted: Sep 29 2020 1:00pm
by JackFlorey
John in CR wrote:
Jul 17 2020 7:27pm
A new friend who want my help building a high powered ebike is also working on a hydroelectric project on his dairy farm that has an electric bill of over $1000/mo. It's up in the mountains at 4,000m of elevation and he has a small river with year-round flow and a whopping 200m of head :shock: . Even with just a 3" pipe he can produce an incredible amount of electricity at the 400gal/hr rate he is planning.
He should be able to get about 2kW continuous, or about 1300kwhr/month. That should offset about $130 a month at 10 cents/kwhr.

Re: Don't we all wish we had this on our property

Posted: Sep 29 2020 1:01pm
by JackFlorey
999zip999 wrote:
Sep 13 2020 3:03pm
What voltage ?
Systems like this often use "wild AC" from generator to rectifier - voltage/frequency determined by RPM and regulated by a MPPT controller.

Re: Don't we all wish we had this on our property

Posted: Sep 29 2020 10:42pm
by John in CR
JackFlorey wrote:
Sep 29 2020 1:00pm
John in CR wrote:
Jul 17 2020 7:27pm
A new friend who want my help building a high powered ebike is also working on a hydroelectric project on his dairy farm that has an electric bill of over $1000/mo. It's up in the mountains at 4,000m of elevation and he has a small river with year-round flow and a whopping 200m of head :shock: . Even with just a 3" pipe he can produce an incredible amount of electricity at the 400gal/hr rate he is planning.
He should be able to get about 2kW continuous, or about 1300kwhr/month. That should offset about $130 a month at 10 cents/kwhr.
It's been a while since I did the research to confirm his estimate of 6kw continuous as a fairly conservative estimate, but it was more than enough to offset the $1k/mo electric bill for his dairy farm. Note that our 98% green electricity is nationalized, and despite being primarily hydro power, our cost per kwh is almost double your 10 cents. Too bad there's such corruption, because I have pleasant dreams of 2 cents/kwh in the areas supplied by hydro in parts of Canada. If I live long enough to see real global warming, maybe I'll head north to Canada, which would become the new farm belt of the west.

Re: Don't we all wish we had this on our property

Posted: Sep 29 2020 11:12pm
by JackFlorey
John in CR wrote:
Sep 29 2020 10:42pm
It's been a while since I did the research to confirm his estimate of 6kw continuous as a fairly conservative estimate, but it was more than enough to offset the $1k/mo electric bill for his dairy farm. Note that our 98% green electricity is nationalized, and despite being primarily hydro power, our cost per kwh is almost double your 10 cents.
Hmm. 400 gal/hr is .42 liters per second. Are you sure that's right? That's a pretty small amount of water to run a hydro system with.

Re: Don't we all wish we had this on our property

Posted: Sep 30 2020 1:13am
by John in CR
JackFlorey wrote:
Sep 29 2020 11:12pm
John in CR wrote:
Sep 29 2020 10:42pm
It's been a while since I did the research to confirm his estimate of 6kw continuous as a fairly conservative estimate, but it was more than enough to offset the $1k/mo electric bill for his dairy farm. Note that our 98% green electricity is nationalized, and despite being primarily hydro power, our cost per kwh is almost double your 10 cents.
Hmm. 400 gal/hr is .42 liters per second. Are you sure that's right? That's a pretty small amount of water to run a hydro system with.
Ah, now I see where I went wrong on the original post. It's 400gpm not per hour. His river and waterfall have real flow, and then we both discounted each thing quite a lot to prove his desired 6kw seemed quite reasonable.

Re: Don't we all wish we had this on our property

Posted: Sep 30 2020 3:44pm
by JackFlorey
John in CR wrote:
Sep 30 2020 1:13am
Ah, now I see where I went wrong on the original post. It's 400gpm not per hour. His river and waterfall have real flow, and they we both discounted each thing quite a lot to prove his desired 6kw seemed quite reasonable.
Oh, OK! Definitely agree then.

Re: Don't we all wish we had this on our property

Posted: Feb 21 2021 4:50pm
by mu0
Genuinely, this is the dream.

Can I ask what country your friend's farm is in?

Re: Don't we all wish we had this on our property

Posted: Feb 28 2021 12:35am
by markz
Costa Rica aka "CR" in John in CR is my guess.

Yes, the dream is to own land and to live off the land. However I am not the person to live out in the sticks, I would need to live near a big city even if its out in the country, say 20-40 minute drive to the big city lights. I'd be hesitant to live in a city of a population less then 50 or 75k. But maybe the slow stroll, what I like to call the spanish walk, would be better. Beach would be a must!
mu0 wrote:
Feb 21 2021 4:50pm
Genuinely, this is the dream.

Can I ask what country your friend's farm is in?

Re: Don't we all wish we had this on our property

Posted: Feb 28 2021 11:19am
by DogDipstick
Mennonites are building a wheel at the CNC Metal shop we contract. They are good with their plasma cutters, that is for sure.

Lol.....its 25 feet in diameter and gonna do ~20-30RPM on about 1100-1350 Ftlbs of Tq.


Lol at your math, John in CR.

I was very interested, and love these equations. I remember when you post this.

400 GPM yes... 200m head.. 3" pipe...

(Aside : Us or Imperial GPM? Lets assume US;)

200m = 656.168 (Ft)


444.83 GPM = 1 cuFt/Sec

Density is 62.5lbs/Cuft

Pressure available is Head (x) Density of fluid =41,000 Lbs force / square foot

41,000 Lbs force / square foot (x) .89 Cubic foot / sec = (Theoretical work energy available... )


=36,500 Ftlbs / sec.

550 Ftlbs/sec = 1 hp

66.36 horsepower availability that theoretical pipe.

6Kw should not be a problem. lol.

( negating efficiency and whatnot Expect 70-90% with the losses in the pipe ad whaddabing waddabang) )


400USGPM @ 658Ft of head = 50 Theoretical Kw. Realistically ~35Kw NET.

Re: Don't we all wish we had this on our property

Posted: Mar 02 2021 5:31pm
by markz
(Aside : Us or Imperial GPM? Lets assume US;)
That is always the case.