New Topic - Water Pressure [RE-wrenches]

[jay peltz]

Hi Carl,

I recommend the largest pressure tank you can find/afford.  This reduces cycle times-start surges.

If they use small amounts of water then a DC motor will work OK, but the cost differences are so large that
you might find it pretty even to use a AC motor and then add more panels.

cheers,

jay

peltz power

Carl Emerson wrote:

> Hullo there...
>
> I am inviting comment on one of the most difficult problems I face.
>
> In a remote installation the most common way in NZ to achieve water pressure for a residence is to use an
> AC pump with a small pressure chamber.
>
> This is when the client does not want to have a 'header tank' on a high stand.
>
> Now this 'on demand' water pressure system is very energy hungry. Typically the pumps have a high surge
> start and cycle on and off constantly under low flow demand conditions.
>
> Now one approach is to replace the AC pump motor with a DC equivalent. Over here 48 Volt 1.5 HP motors
> are hard to find. If you can get one then this will help to solve the problem, it will also reduce the
> light flicker every time you turn on a tap.
>
> So I wondered if anyone had come up with another solution because as it stands water pressure is one of
> the most energy demanding elements of the overall system design.
>
>  Thanks for your thoughts...
>
> Carl Emerson
> Manager
> FREEPOWER LTD.  "Harnessing Natural Energy"
> P.O. Box 10-1207 N.S.M.C. Auckland, NEW ZEALAND.
> Ph. 09 4275206 fax 09 4275208  cell 021-633999  web www.freepower.co.nz
>
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