[Gasification] Energy storage by "pumping"

[Peter Singfield]

Energy storage by "pumping"

I have a large amount of hard drive archive on this very subject.

Probably the most efficient -- pump water to an elevated reservoir -- they
do this using mountains -- they were supposed to build one such
"energy-capacitor" in Quebec to handle extra hydro power produced at night.

Hydraulic accumulators is the next most efficient system of "pump" storage.

Same as the elevating water deally -- except ever so much more compact.

Compressing air has been widely applied in the past -- and still is today
-- but is not as energy efficient due to the heat losses in compressing a gas.

Using off the shelf components -- 

Just speculating mind you -- but the basic flow diagram.

You pump up "X" amount of available technology composite plastic CNG tanks
-- these become your pressure accumulators.

You attach these in the proper manner to "X" amount of CNG tanks which are
them pumped up with hydraulic fluid.

You run this system at 3000 PSI (I noted in my searches yesterday they are
now doing CNG to 3600 PSI)

Piston hydraulic pumps are 90% plus pump efficiencies.

Piston hydraulic motors are 90% plus efficiencies.

Good PM alternator -- plus 90% efficiencies.

Do this right and you do better than Plante batteries. But not by much -- 

And much more complicated/and expensive -- so to speak -- in real practice.

But still -- a system you can easily assemble from readily available parts
already sitting on collective shelves -- be you so inclinded.

Peter / Belize



At 09:16 AM 6/12/2007 -0600, Bob Stuart wrote:
>
>On 12-Jun-07, at 8:49 AM, Peter Singfield wrote:
>
>>
>> At 01:29 PM 6/12/2007 +0200, you wrote:
>>> Peter,
>>>
>>> Have you got any URL's for the household compressors?
>>
>> A while back we discussed a small house system for compressing  
>> natural gas
>> -- enough to fill one's car tank -- over night.
>>
>> Those Urls were posted -- but for the life of me -- I can't find  
>> them now!!
>
>Here's one:  http://www.eco-fueler.com/about/our_technology.html
>
>>
>> My present line of development should be of major interest to  
>> gasifiers --
>> that is fast charging battery packs using DC PM dynamos -- sop you  
>> run your
>> gasifier/engine set up at max capacity for -- saying -- but 2 hours  
>> per day.
>
>When I was looking at small tidal power systems, I was  delighted to  
>see how easy it would be to store power for just six hours.  I think  
>that it is worth looking at pumped storage even on a small scale.   
>Supplementary windmills can pump water at high efficiency and low  
>investment.  Even if a water tower has to be erected, I might prefer  
>it to an equivalent bank of batteries.  Has anyone done the numbers  
>on this?
>
>Best,
>Bob Stuart
>
>
>
>
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