Posted by *gomango* on October 19, 2008, 2:43 pm

Ok guys,

I posted a new one to bring it up in the pages a bit. Im looking for

some math help at this point. I did a lot of reading and digging and

still have no answer, so I hope someone out there has a close answer

for me. I have a 4" smooth pipe, and its 230 feet long. The head in

this pipe is 16 feet from the inlet to the discharge. The creek is

still dry, so I cant calculate flow. Using basic formulas (that I

cant find) is it possible to calculate volume and pressure off of the

unknown? What I want to know is how much volume and the velocity if

this pipe was running full. There are three 45 degree bends in the

pipe to snake it arround the creek, but other than that it is straight

and all down hill.

Posted by *z* on October 19, 2008, 5:52 pm

1aeb696edfea@d45g2000hsc.googlegroups.com:

*> Ok guys,*

*> *

*> I posted a new one to bring it up in the pages a bit. Im looking for*

*> some math help at this point. I did a lot of reading and digging and*

*> still have no answer, so I hope someone out there has a close answer*

*> for me. I have a 4" smooth pipe, and its 230 feet long. The head in*

*> this pipe is 16 feet from the inlet to the discharge. The creek is*

*> still dry, so I cant calculate flow. Using basic formulas (that I*

*> cant find) is it possible to calculate volume and pressure off of the*

*> unknown? What I want to know is how much volume and the velocity if*

*> this pipe was running full. There are three 45 degree bends in the*

*> pipe to snake it arround the creek, but other than that it is straight*

*> and all down hill.*

*> *

Here is a win32 application someone wrote that I use. I assume its

accurate

http://www.energyalternatives.ca/Downloads/MicroHydroCalc.exe

you can plug some numbers in there and get an idea maybe

good luck!

Posted by *news* on October 19, 2008, 7:19 pm

*>1aeb696edfea@d45g2000hsc.googlegroups.com:*

*>> Ok guys,*

*>> *

*>> I posted a new one to bring it up in the pages a bit. Im looking for*

*>> some math help at this point. I did a lot of reading and digging and*

*>> still have no answer, so I hope someone out there has a close answer*

*>> for me. I have a 4" smooth pipe, and its 230 feet long. The head in*

*>> this pipe is 16 feet from the inlet to the discharge. The creek is*

*>> still dry, so I cant calculate flow. Using basic formulas (that I*

*>> cant find) is it possible to calculate volume and pressure off of the*

*>> unknown? What I want to know is how much volume and the velocity if*

*>> this pipe was running full. There are three 45 degree bends in the*

*>> pipe to snake it arround the creek, but other than that it is straight*

*>> and all down hill.*

*>> *

*>Here is a win32 application someone wrote that I use. I assume its *

*>accurate*

*>http://www.energyalternatives.ca/Downloads/MicroHydroCalc.exe *

*>you can plug some numbers in there and get an idea maybe*

*>good luck!*

You now have to register to download, so just use the

http://www.energyalternatives.ca link and click downloads

John

Posted by *gomango* on October 20, 2008, 1:08 pm

Boy, that takes all the brain work out of it.

Hmmmm, Now this is telling me that I have 276.78 watts available. I

think this program will also tell me enough to build the banki turbine

as well. Great link guys. Thanks.

Im a bit discouraged about what I found. I think that there would

have been a lot more energy from a 4" pipe than that. I think that a

6" pipe will suck the creek dry, so thats out of the question. I was

hoping for at lease 1 HP.

Posted by *news* on October 20, 2008, 2:01 pm

On Mon, 20 Oct 2008 06:08:32 -0700 (PDT), gomango

*>Boy, that takes all the brain work out of it.*

*>Hmmmm, Now this is telling me that I have 276.78 watts available. I*

*>think this program will also tell me enough to build the banki turbine*

*>as well. Great link guys. Thanks.*

*>Im a bit discouraged about what I found. I think that there would*

*>have been a lot more energy from a 4" pipe than that. I think that a*

*>6" pipe will suck the creek dry, so thats out of the question. I was*

*>hoping for at lease 1 HP.*

Since the creek appears to run continuously during the wet season, you

can multiply 276 by 24 to get 6624 watt hours per day - if you have

sufficient battery storage you should be able to power necessities at

a small cabin (small, high efficiency fridge; a few CFLs (better yet,

LED bulbs), etc.

John

> Ok guys,>> I posted a new one to bring it up in the pages a bit. Im looking for> some math help at this point. I did a lot of reading and digging and> still have no answer, so I hope someone out there has a close answer> for me. I have a 4" smooth pipe, and its 230 feet long. The head in> this pipe is 16 feet from the inlet to the discharge. The creek is> still dry, so I cant calculate flow. Using basic formulas (that I> cant find) is it possible to calculate volume and pressure off of the> unknown? What I want to know is how much volume and the velocity if> this pipe was running full. There are three 45 degree bends in the> pipe to snake it arround the creek, but other than that it is straight> and all down hill.>