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Posted by Neon John on March 16, 2009, 4:23 pm
 
On Mon, 16 Mar 2009 08:45:36 -0500, "William Wixon"


Not gonna get into an "is too, is not" debate by remote control but
this is simply wrong.  I'd love to see a simple ball bearing that size
rated for over half a ton of axial load.  

In addition to being an engineer, I also moonlight in an electric
motor repair shop and have for decades.  I've learned a few things
about bearings and have seen the disaster that results when motors are
operated vertically without being outfitted with thrust bearings.

A motor usually stops when the bearing fails and the rotor gets out of
alignment enough to trip the protective device (or smokes the stator
if it doesn't have one) but on a generator?  Who knows?

This guy obviously has a lot of money to spend so maybe trashing a
generator every so often isn't a big deal but the work to replace it
is, at least to me.  All he needs to do is fit a thrust bearing on the
bottom and problem solved.


I agree but not because of water hammer. simple KISS.  Water hammer is
handled with a surge column - no big deal.

I don't want to come off sounding negative because I AM impressed with
his whole setup.  It's just that it could be improved with only a tiny
additional cost and effort.

John

Posted by z on March 17, 2009, 3:28 am
 


Yeah the scale of the project and work involved is staggering.. and
impressive.

Posted by Gordon on March 16, 2009, 7:22 pm
 

Being a frugal Yankee, what gets my hackels up about this system
is the thought of all that power dumped for the sake of regulation.
If it were me (and I know it's not), I would have run a 2nd line up
to the house and hooked it to a water heater or electric baseboard
heater.  Then, the load dump controler would act more as a load shed
controler.  I realise that this would not be simple, since the
dump load and the 2nd line would like to see a significant amount of
power running through them.

At least one remote control valve would be nice.  That would allow
the system to be put into lower power operation (or kick it into
higher power opperation) when usage demands it.

Posted by William Wixon on March 17, 2009, 3:53 am
 

i'd imagine he'll make improvements as time goes by, he's up to his ass in
alligators right now.  i thought it was a helluva start.

b.w.



Posted by Gordon on March 17, 2009, 10:59 pm
 

I agree, it's impressive.  Certianly with a project of this
magnitude, you just try to get it running as a start.  Then
you look for improvments as you go along.  My nitpicking was
just that.

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