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Storing wind-generated energy as gravitational potential energy? - Page 36

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Posted by Neon John on December 10, 2008, 10:12 am
 



Ever hear that joke about the muslem terrorist and the US GI fighting in the
desert when they kick up a magic lamp and the genie comes out?

Genie sez to the terrorist: "Since you're an Arab, you get your wish first".

Terrorist sez: "I desire a giant wall 1000 feet high and 100 feet thick of
solid concrete to surround all of the muslim world to protect it from the
infidels and that all infidels inside be removed."

Genie sez: "So it is asked, so it is done."  And the great wall sprang up and
all the infidels went sailing over it.  With parachutes, of course, as this is
a loving and merciful genie.

GI thinks for a moment and sez:  "Did you say 'solid concrete'"?

Genie sez: "Yes, the finest solid concrete of the arab world."

GI Sez: "OK, my wish is this.  Fill it up with water."


Bada boom.....

:-)

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
You can't turn [MS] shovelware into reliable software by patching it a whole
lot. -Marcus Ranum


Posted by Doctor Drivel on December 10, 2008, 2:03 pm
 



London is going to flood anyway.


Posted by David Hansen on December 7, 2008, 5:23 pm
 On Sun, 7 Dec 2008 07:31:41 -0800 (PST) someone who may be John


Whether one needs a battery depends on whether the wind generator is
connected to an external system or not. If it is connected to an
external system then the easiest thing is to export the electricity.

If it is not connected to an external system then at a house scale a
battery is just about it. There have been developments with
capacitors and flywheels are possible, though both run for
relatively short periods. Compressing air or producing hydrogen are
other alternatives.

Of course the way to improve all these storage methods is to reduce
electricity consumption.



--
  David Hansen, Edinburgh
 I will *always* explain revoked encryption keys, unless RIP prevents me
 http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Posted by BigWallop on December 7, 2008, 5:33 pm
 

Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha Ha  !!!!!!!

You are kidding on, aren't you?  The energy used to lift the weight would
exceed the energy given back, unless you had some way of storing the energy
given.  To lift a 1kg weight takes 1.3kg of force just to make it move
against the effects of gravity and friction through air.  So you use 0.3kg
more of the potential on every lift cycle, unless you had some way of
storing the energy used to lift the weight.

If you can think of a way to lift a lighter weight to the height you need,
then make the weight heavier when it reaches the top, you might be on to a
winner.  But, until then, stick to just directly spinning a magnet in a coil
and store the generated potential energy in an accumulator.

Believe me.  The perpetual motion motor will never exist in our lifetimes,
combined.

Point one.  You lift your weight to the maximum height and do not use any
power.  The weight stays at the top.  But the lifting mechanism is still
able to use the source that it used to lift the weight, because the source
of energy is still there.  The power source has not stopped at the top like
the weight has.  That's wasted potential energy right at the start.

Point two.  You begin to use power and the weight begins to drop.  It is
limited in its possibility to provide energy by the height.  You are still
using the power it is giving, then the weight hits the ground and stops.
Your power source stops and you have to begin lifting the weight again.
That is a waste of energy in having to stop using the power and start off
lifting the weight again.

Point three.  You have a perfectly good source of renewable energy spinning
the pulley system used to lift the weight, which could possibly be used to
spin a generator to provide an unlimited amount of power directly to the
system which will use it.  Why waste all that potential energy source trying
to do something that is not going to provide anywhere near the same
unlimited amount of power.  It a waste of time and brain power even thinking
about it.

Would you like to be directed to a cheaper source of rechargeable batteries?

:-) LOL  It was a good thought, but stop it.



Posted by Derek Geldard on December 9, 2008, 6:39 pm
 On Sun, 07 Dec 2008 17:33:04 GMT, "BigWallop"



Definately a BZZT. there


You mean carry it up a step ladder and put it on ? That would work.


<snip 3 paragraphs>

All we are discussing is a system for storing energy FFS. Issues about
what happens to the energy that's not stored or what happens when
there's no energy to store do not concern us.



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