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Open-loop geothermal - well problems LONG POST Reinhard 08-07-2007
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Posted by Reinhard on August 11, 2007, 10:23 pm

>
It's me again - I don't have it!?! Darn.

I just checked into the salt generators and they won't work for
disinfection of the well for two reasons;

- my well water is below the minimum salt concentration these units need

- the units don't crank out enough chlorine to get my minimum 50 ppm
concentration, even if the groundwater had enough salt.

In order to make this work I would have to inject salt ahead of the
generator and/or lower the pump speed so lower amount of chlorine would
yield a higher concentration but the flow would have to be about 1/8 th of
the present pump flow. Not doable.

Back to square one.

PexSupply Save 10 468x60
Posted by pRECISIONmachinisT on August 14, 2007, 2:30 am

>
> >
> It's me again - I don't have it!?! Darn.
>
> I just checked into the salt generators and they won't work for
> disinfection of the well for two reasons;
>
> - my well water is below the minimum salt concentration these units need
>
> - the units don't crank out enough chlorine to get my minimum 50 ppm
> concentration, even if the groundwater had enough salt.
>
> In order to make this work I would have to inject salt ahead of the
> generator and/or lower the pump speed so lower amount of chlorine would
> yield a higher concentration but the flow would have to be about 1/8 th of
> the present pump flow. Not doable.
>
> Back to square one.

http://www.aquascience.net/b&bchlorinator.htm

--


Posted by ken www.communityprinters.com on August 23, 2007, 8:38 pm


> - my wellwateris below the minimumsaltconcentration these units need
>
> - the units don't crank out enough chlorine to get my minimum 50 ppm
> concentration, even if the groundwater had enoughsal

If considering Chlorine I think you would be better to check out a
source for powdered Chlorine. Though from Canada we have a place in
Mexico and the powdered chlorine I use there is probably 10 times the
strength of bleach, maybe stronger about 2 ounces a day maintains the
strength for a 4x5x1.5 meter pool.

I was considering Geothermal for airconditioning, with all of 1
supplier 1000 kilometers distant, initial suggestion was for a open
well system consisting of 3 wells, one to provide the water and two
for returning to ground. Location being a beach area the well water
is very salty virtually seawater so we had been re-considering a
closed well system.

Unfortunately well drilling is expensive here, 1/10 the price where
the re-seller is, Geothermal units are also expensive and restricted
to 1 year warranty. We can buy split air conditioners for 10% of even
older Geothermal, WaterPump.com versatec units even without
considering the wells. These are for the older refrigerant types which
will be phased out about 2010. We may simply have to go with split air
conditioners and perhaps convert in 5 or so years by which time the
technology may have reduced in price.

I still wonder about reality of Salt Water Chlorine Generators. In
Science passing a current through water created electrolysis which
caused Hydrogen and Oxygen to separate into gasses. The table salt
normally becomes ions of Sodium and Chloride while disolved - what is
the generator really doing.

I know a pool of salt water will discourage growth of Algae for
several days and if its circulated how would that differ from the
ocean.

Simple question if anyone has the chemical equation answer to how
these generators are supposed to produce chlorine.

Last question would be what of the possibility of closed loop, loops
in the river

k_graham@hotmail.com
www.playalindahotel.com



Posted by PrecisioNmachinisT on August 24, 2007, 1:46 pm

>
> I still wonder about reality of Salt Water Chlorine Generators. In
> Science passing a current through water created electrolysis which
> caused Hydrogen and Oxygen to separate into gasses. The table salt
> normally becomes ions of Sodium and Chloride while disolved - what is
> the generator really doing.
>
> I know a pool of salt water will discourage growth of Algae for
> several days and if its circulated how would that differ from the
> ocean.
>
> Simple question if anyone has the chemical equation answer to how
> these generators are supposed to produce chlorine.
>

2NaCl + H2O = CL2 + 2NaOH + H2

--



Posted by Reinhard on August 26, 2007, 10:44 pm

>
> I still wonder about reality of Salt Water Chlorine Generators. In
> Science passing a current through water created electrolysis which
> caused Hydrogen and Oxygen to separate into gasses. The table salt
> normally becomes ions of Sodium and Chloride while disolved - what is
> the generator really doing.
>
> I know a pool of salt water will discourage growth of Algae for
> several days and if its circulated how would that differ from the
> ocean.
>
> Simple question if anyone has the chemical equation answer to how
> these generators are supposed to produce chlorine.
>
> Last question would be what of the possibility of closed loop, loops
> in the river
>
> k_graham@hotmail.com
> www.playalindahotel.com
>

I had settled on the generators for our swim-in-place pool in the
basement until I read an article stating that chlorine was the same no
matter how it was obtained; chemicals or generators. That makes me wonder
why they say it doesn't smell or make your eyes red. Now your comment
about the oxygen and hydrogen rings a bell. Would the generators make
explosive levels of hydrogen? I, too, would like to see someone explain
the chemistry.

As to you question about closed loops in the river - that would be a
great idea and more efficient than ground burial if the river doesn't
freeze like thye do up here. The closed loop in the river would be much
cheaper than ground burial and it would avoid a lot of hassles that the
ground systems can have. In any closed loop system it is necessary to
ensure a competent thermal surround for all of the piping. In vertical
loops they use a thermal grout, at least they are supposed to. Around
here they claim it is not necessary and the customers are getting a lot
lower efficiency than they paid for. Horizontal loops can be even worse
if they are bedded in sand which is common to create a smooth support for
the pipes. If there is no groundwater to saturate the sand then the
thermal efficiency is very low.

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