Regarding the use of wedge-wire screens. They are only self cleaning if a significant portion of the flow continues past the screened intake because if the...
Evans Engineering
re@...
May 1, 2004 12:43 pm
4861
i've got difficulty in designing of a mechanics of propeller adjustment for vertical Kaplan turbine. it's bos diameter is 589 mm and propeller diameter is 1510...
Dear Group, I have enjoyed the pleasure of reading many of the dispatches going through the site and have gained much insight into the design of turbines and...
Yves Grandmaitre
ygrandmaitre@...
May 7, 2004 4:28 pm
4863
Hello Mr. Grandmaitre, I have thought to try the same for a family house we bought, currently under rehabilitation. The available water pressure from the...
Dear Bob: This screen you speak of, I believe the coanda, sounds great...and has sounded great for a couple of years. If Marc makes a request for information ...
Jeffe
jeffe@...
May 9, 2004 8:43 am
4865
Dear Rupert....this idea sounds great...but I have a 2 meter head unit, though it's only about 125 ltrs/scnd at low water, maybe 300 at high. I'm wondering if...
Jeffe
jeffe@...
May 9, 2004 8:44 am
4866
Dear Yves Somebody earlier described how he generated power from his toilet flush. ... From: "Yves Grandmaitre" <ygrandmaitre@...> To:...
... This seems to be a niche market waiting to be filled. I have been approached a number of times by people wanting a low cost [US$150 or less] device that...
Max Enfield
max@...
May 9, 2004 8:48 am
4868
Dear group, See the message by Binyam Abate below. Reactions to him directly at biny1097@..., c.c. to the group when relevant. Regards, Wim ... ...
Now this is real micro. You state you need output in the mA range. Unfortunately this does not give people here enough information to give much help. If you...
Hello folks, I've been catching up on what is going on in the microhydro world and this site is fantastic! It is refreshing to see all the help, good advice...
Rupert I would be interested to see the pictures you offered to show. I have a 1 m diameter mild-steel pipe feeding an 18 inch Francis. The (21 m long) pipe is...
Hi Mike, I am targeting something in the .3-.5watt range. Pressure will from a household type plumbing system, average 45PSI through a ½" pipe. Because of ...
Yves Grandmaitre
ygrandmaitre@...
May 11, 2004 6:51 am
4873
Small units of this type where available in the 1920-30s to use water faucets as the supply. Some of the units were centrifugal pumps operated in reverse. All...
Dear Jeffe, The design of your screen will depend on the amount and type of the debris, how much room you have at the intake, amount of spare water (if any)...
Evans Engineering
re@...
May 13, 2004 5:09 pm
4875
Howdy all, I am looking for a suitable DC dynamo or permanent magnet motor to produce an output of 1-2 amps at 12volts. I could live with higher up to 24v and...
Young, Robin W
robin.young@...
May 14, 2004 5:23 pm
4876
Hi, You can either use a Gently Annie PM washing machine motor for output up to 5 amps or a smart drive for much higher output. For the Gentle Annie connect...
Robin: I have been planning to use a stator and flywheel off an Kolhler riding lawm mower engine. It must be one with electric start as you would use the...
The fisher & Pykel Gentle Annie washing machine has a fixed magnet 12v motor that has both low speed and high speed wirings. The low speed mode is best suited...
Look at www.windstreampower.com - permanent magnet dc generators. ... From: Young, Robin W To: microhydro@yahoogroups.com Sent: Friday, May 14, 2004 1:48 AM ...
Robin: I have used wind shield wiper motors, radiator cooling fan motors, seat mover motors as generators, though they need to be rotated from 1400 to about...
Nando
nando37@...
May 15, 2004 1:56 pm
4881
Dear Rupert: Thanks for all the detial. My "water race" overflows occasionally during high water, where a few inches of water passes over the side, but usually...
Jeffe
jeffe@...
May 15, 2004 1:56 pm
4882
Dean: Can you be more explicit and give us a more detail information about what you want to do, as well as, a good description of the :stator and flywheel off...
Nando
nando37@...
May 15, 2004 5:12 pm
4883
Dear members, Please see below the request for quotations that reached me today. If you will be able to help them, please contact them directly. The mentioned...
Hi, I'm interested in a run of the river scheme with a potential of at least 300kW. It consists of a 2m head, 45 degree straight concrete weir with flat river...
Dear members, See message below. Answers to Muralidhar directly at <nagar137@...>, c.c. to the group when relevant. regards, Wim Klunne group moderator ...
DEar Mr, do you have still the petlon turbine, if it yes, please could you send the photos and tell what else include the turbine?? Andres. ...
Andres Calizaya
andrecaly@...
May 21, 2004 11:23 am
4888
Splynk: Like you say, you are just asking an impossible question (how long is a piece of string!), A survey is needed to determine the best way to perform your...
Nando
nando37@...
May 21, 2004 5:08 pm
4889
Dear Group, One of my colleagues is tasked to write a manual on hydropower for rural people. The publication needs to be very easy to understand as most of the...
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