Media comment
We have scanned in a magazine article about
the pump and the web comment starts on the right beside the picture.
This page is due for an update but other things come first!
This is part of an article which appeared in a British farmers publication
called Practical Farm Ideas
in the Spring 1997 edition. At that time we called it the blow pump.
(The pump can pump much higher than the 4 meters stated in the article).
Also I never let gravel in to it. It was more like coarse sand. Both
pumps still work but the one with 6 inch pipes proved too big for the normal
stream flow and was never used much. Brian White January 31st 2001
Below you will find some web comment. Some didn't even look at
the web page before commenting but Peter Guerin certainly did. In fairness,
few have ever heard of a tromp, it is like an airlift pump working in reverse.
(His bit is at the end in Brown).
Subject:
Re: water power, no moving parts.
Date:
Sun, 14 Mar 1999 09:19:30 GMT
From:
pguerin@bigpond.com.au (Peter Guerin)
Organization:
Telstra BigPond Internet Services (http://www.bigpond.com)
Newsgroups:
alt.energy.homepower
References:
1 , 2 , 3 , 4
On Fri, 12 Mar 1999 16:06:00 -0500, "LETH'R" <xxx@yyy.com> wrote:
>Well, it wasn't my original post, but I have the web site for ya:
>
>http://w(our old web address)
>
>Take a look. It seems to use the head of falling water, and
entrained
>bubbles to move water up another pipe like a bubbler tube.
>
>Maybe you'll get a different take on it than I did.
>
>Tim Wilson wrote in message <36E884B3.A1E35021@cmwave.com>...
>>If this discussion is about a hydraulic ram there are two moving
parts
>>the clack valve and the output check valve.
>>
>>Tim
>>
The device described is also known as a tromp
or trompe. It is an old technology that was used in blast furnaces and
mines in the past. The drawing at htp(oldweb
address) shows the top of the inlet pipe level
with the surface of the water. Another way to introduce air into the water
flow is to use a venturi towards the top of the inlet pipe. This also allows
the air to water ratio to be varied by controlling the air inlet. The drawing
shows the small diameter pipe below the water level in the holding chamber.If
the purpose was to pump air only the pipe would terminate at the top of
the chamber. This technology has been proven for several hundred years
and I think it may still be useful today in microhydro-electric applications.
The air could be reticulated to a pneumatically driven generator. This
has
the advantage of removing expensive turbines and generators from damage
by flood and corrosion , and cutting transmission losses between the point
of generation and storage or use.
We recommend a low cost simple approach. In saying that,
there is nothing wrong with Peter Guerin's approach. However going deep
enough to give enough pressure to work that generator would prove too expensive
for the average user.
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