Hybrid Car – More Fun with Less Gas

Storing wind-generated energy as gravitational potential energy? - Page 11

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Posted by Neon John on December 9, 2008, 3:50 pm
 


The practical problem is, that would only about half unload the pump.  the 100
ft head of water is about 41 psi (from memory using about 29 inches of water
per psi.) of static head before the pump turns a revolution.  One would need
some sort of bleed valve or weep hole at the bottom to allow the water column
to drain away (and then figure out how to deal with the water hammer that
resulted) or perhaps a custom valve that would let the pump operate in local
recirc mode for a few seconds.

Far too complicated for my tastes, especially since the larger inverter will
do the job without modification and with plenty of head room.

John

--
John De Armond
See my website for my current email address
http://www.neon-john.com
http://www.johndearmond.com  <-- best little blog on the net!
Tellico Plains, Occupied TN
Sporadic E is the Earth's aluminum foil beanie for the 'global warming' sheep.


Posted by Bob F on December 9, 2008, 6:42 pm
 


OK. Use the sprinkler valve to dump tank pressure to the pump input during
startup.

Or, how about a "soft-start" solid-state relay? (Well, it sounds good -
I have no idea if it is suitable)

I'll quit now. You are right about the inverter.



Posted by Neon John on December 10, 2008, 12:55 pm
 


This is a submersible pump so one would have to make another 200 ft pipe run
to the pump inlet.  Just the head pressure would equalize the pump but at the
expense of a lot of work and materials and it might fail dangerous (in bypass)
when I needed it the most.


I've already put a kick-starter on it (capacitor and PTC) that supplies
starting VARs but that wasn't enough.  It does keep the pump from flickering
my lights, though.


yeah, I think so.  I've killed a bunch of brain cells thinking about this. For
fire protection, it has to be stone cold reliable.  Even with the inverter,
I'll still have a switch that I can throw and hit the pump with the
generators.  I have two for redundancy and am about to build a slow-speed unit
using a Listeroid engine to burn a supply of waste oil that I have access to.
It's good clean oil, simply designated as waste.

Anyway, my solution has to be as reliable as a rock and that will probably end
up being the 500 gallon tank up on the hill behind the cabin that I've been
mentioning.  If 500 gallons won't put out the fire then it's probably too out
of control to do anything with anyway.  I put out the beginnings of a
brush-fire-caused house fire last year with less than half the 175 gallons on
the FS's pickup-mounted pumper.  With a good nozzle and good technique, it
doesn't take all that much water.

Interestingly enough, in this instance, the engine driven pump almost didn't
start.  It'd catch, surge and quit.  I managed to put out most of the fire
using the surges.  By the time the engine finally caught, the fire was mostly
out, only embers remaining.  I suggested that they might consider a PTO-driven
pump in the future.  Much cheaper than a gas engine to boot.

That experience raised my leeriness-level toward gas powered fire protection
considerably.

John
--
John De Armond
See my website for my current email address
http://www.neon-john.com
http://www.johndearmond.com  <-- best little blog on the net!
Tellico Plains, Occupied TN
Nuke the Whales!


Posted by Alang on December 7, 2008, 6:17 pm
 On Sun, 7 Dec 2008 07:42:06 -0800 (PST), meow2222@care2.com wrote:


http://home.clara.net/darvill/altenerg/pumped.htm

Pump it up and use it when you need it

Posted by Andy Burns on December 7, 2008, 6:51 pm
 Alang wrote:


If only Carole Vorderman had stuck to the day job eh? Instead of
flogging consolidation loans to Countdown viewers who think she's good
at maths...

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