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17221
Re: Intake screening woes ... water will run across a level surface well enough if you pile up enough of it behind. I contend that there is virtue in "lining up" the water rather than
Fritz Oppliger
2:57 PM
#17221
 
17220
Re: Intake screening woes I have been following this thread with half an eye. One thought that comes to mind is that one should have a side intake system - in other words the penstock
Laurence Lombard
2:57 PM
#17220
 
17219
Re: Intake screening woes Thanks Bob... was thinking of I" pvc pipe "curtain" made of foot-long pieces glued into the weighted side of the floater ... (??) ... From: rkweir@...
Tony Goffe
9:48 AM
#17219
 
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17218
Re: Intake screening woes Bjorn, ... I have considered that, but it's hard to do. The problem is what happens during floods! At such times there will be at least 50cm deep water over my
Manfred Mornhinweg
9:48 AM
#17218
 
17217
Re: Intake screening woes Dear all, I have started to make a list of things to try! Thor, ... That's something I never had thought of. Maybe it works, but I have my doubts. I would
Manfred Mornhinweg
Apr 17
#17217
 
17216
Re: Running water through a rotating drum screen There are dry sifters which might work. Essentially you'd run your penstock flow through a large rotating screen drum.put some fins on it so the water causes
FRANK HELLER
Apr 17
#17216
 
17215
Re: Intake screening woes More on the apron idea. It is more like a race that you want, to give the water the speed to push things along. So, how about covering part of the deep water
Fritz Oppliger
Apr 16
#17215
 
17214
Re: Intake screening woes Great documentation! What about an automatic brush cleaner..... install a simple undershoot paddle wheel in the stream with the axis passing over the screen.
BjornOlaf
Apr 16
#17214
 
17213
Re: Intake screening woes Tony, Fill your capped pipe about 1/2 full of water before you cap it. That way it will sink into the water and divert more. Better yet get a good wedge wire
rkweir@...
Apr 15
#17213
 
17212
Re: Intake screening woes Manfred Compared to most people my stuff is pretty crude, but I also have a LOT of debris and variation in flow. The key to getting my coanda screen to work
z
Apr 15
#17212
 
17211
Re: Intake screening woes Hey Manfred   I have followed this project from the start and have drawn much inspiration from you over the years.   I only comment here very occasionally
NOEL SQUIBB
Apr 15
#17211
 
17210
Re: Intake screening woes Dear all, here are my detailed answers to each of you! Manjunath, ... Indeed that could be a good solution. But it requires comparatively complex machinery,
Manfred Mornhinweg
Apr 15
#17210
 
17209
Re: Intake screening woes Hi, have you tried a "floater" ? What that is ...a piece of floating, (capped-at both ends) PVC pipe that is tethered to the bank, so as to float / lay
Tony Goffe
Apr 15
#17209
 
17208
Re: Intake screening woes Dear Manfred, I think you're looking at the problem in the wrong way. By the time the leaves and logs get to yours screen you already have a problem that
susankaveny1
Apr 15
#17208
 
17207
Re: Intake screening woes... If a settling basin or an intake in a concrete column located below the surface of the water, then I'd stop fighting nature And consider installing an
FRANK HELLER
Apr 15
#17207
 
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17206
Re: Intake screening woes Manfred, If I am getting the picture right, is it possible to cut the overflow in the concrete forebay so there is a greater flow rate over the screen at the
kkhi96048
Apr 15
#17206
 
17205
Re: Intake screening woes in this picture http://ludens.cl/paradise/turbine/IMG_8462.jpg I would try FINER mesh on top of what you have - mosquito screen or coanda . Add an apron by
Fritz Oppliger
Apr 15
#17205
 
17204
Re: Intake screening woes Hi Manfred, Just an idea for further development, use some kind of a comb-filter. My late uncle worked quite a lot on micro hydro during his live. He often
thorhallurr
Apr 15
#17204
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17203
Re: Intake screening woes Dear Manjutah, Bjorn, Joel, Chuck, Paul, Patrick, Bob, Ian, Mark, and any other who might have replied after I got the last group digest, first let me express
Manfred Mornhinweg
Apr 14
#17203
 
17202
Re: Intake screening woes Hi , I solved the intake / trash rack clogging problem and got a few more feet of head in the process. See:
Robert J. Honders Sr
Apr 14
#17202
 
17201
Re: Intake screening woes The only time I have problems is in the fall when there is no excess flow and the creek in being clogged with falling leaves. All other times the screen stays
kkhi96048
Apr 14
#17201
 
17200
Re: Intake screening woes Manfred: Have you tried a silt trap? It sacrifices a bit of head (half the height of the trap) but can be effective for certain flows (I'm not sure what yours
Rob Landau
Apr 14
#17200
 
17199
Re: Intake screening woes Manfred, Could you post some pictures of the intake region of the stream, and give us the flow rate you need to screen and the 'head-loss' which will be
ian benson
Apr 13
#17199
 
17198
Re: Intake screening woes Manfred, As a tilted wire wedge wire screen guy I am very interested in your problem, and will help you to solve your problem. To begin with, all of us in
rkweir@...
Apr 13
#17198
 
17197
Re: Intake screening woes I haven’t got my system into operation but my water supply is an old mill Race dating from 1771. It has a stilling pool it the end of the race where the
Pat Moore
Apr 13
#17197
 
17196
Re: Intake screening woes Hi Manfred and hydro enthusiasts.  I once came across a rotating screen that had internal spiral vanes. These were arranged to turn the screen so that the
Paul Glouchkow
Apr 13
#17196
 
17195
Re: Intake screening woes Sounds like a perfect application for a Hydroscreen. Contact Bob Weir at: www.hydroscreen.com Chuck Hutton From: microhydro@yahoogroups.com
Chuck Hutton
Apr 13
#17195
 
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17194
Re: Digest Number 3606 Dear Manfred, I too am very interrested in finding a solution to this problem. I have a system with similar head and flow to yours (turgo with 40 L/ second and
Mark Attwood
Apr 13
#17194
 
17193
Re: Intake screening woes Hi Manfred, I'm a bit surprised that the so called "coanda-effect" screen didn't work. Are you trying to take 100% of the flow at times? Inclined plate
jdgrov
Apr 13
#17193
 
17192
Re: Intake screening woes Just thinking out of the top of my head here and probably useless, but what about 3 screens in parallell in fa rame for all 3. The inner one fixed to the
BjornOlaf
Apr 13
#17192
 
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