Storing wind-generated energy as gravitational potential energy? - Page 6

 Neon John wrote:

Acids eat through concrete, its not very effective bunding.



why charge it that way when you can charge it by putting it in
service. Charging from dc mains via a lamp is also unsafe & grossly
inefficient.

Why use multiple flat plates when you can use sheet and bend it round.
Think.


NT

  On Sun, 7 Dec 2008 15:10:35 -0800 (PST) someone who may be jim


The RO scheme was costing each household £9 a year in 2007. £2.25 a
quarter, somewhat less than the price of a pint of beer.

To this one should add the various energy efficiency schemes, around
£10 per quarter and around £12 for the EU emissions trading scheme.

The estimate was that in 2008 all these measures would increase
bills by £9 per year.

<http://www.sd-commission.org.uk/publications/downloads/DomesticEnergyPriceAnalysis.pdf>

I'm not a fan of the emissions trading debacle, but I think the rest
is money well spent.


I think that this idea is only a feature of straw man arguments.


What we are beginning to see often happens is that the original wind
farm is repowered after a decade or so and the old wind turbines
re-used elsewhere. The Dancing Ladies of Gigha are an example of
re-used turbines
<http://www.scotland.gov.uk/Topics/SustainableDevelopment/CaseStudies/DancingLadiesofGigha> .


Vestas included the "large" amount of concrete in their studies
<http://www.vestas.com/en/about-vestas/sustainability/wind-turbines-and-the-environment/life-cycle-assessment- (lca).aspx>.
I will be interested in seeing your rebuttals.



--
  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

 

What whole house UPS system do you have John?

 On Sun, 07 Dec 2008 18:30:31 -0600, me@privacy.net wrote:


A neon-john junk-box special.  :-)  There is an old APS 2kW (I think, the
nameplate is long gone) computer UPS that is over 15 years old.  That runs
most of my "vital bus" which consists of lighting, a refrigerator and my
computers.  The rest of the system is a series of cheap inverters that power
either individual loads like freezers or clusters of loads that are likely to
be operated at the same time.  I'm currently saving my nickels to get a 3.5kw
ChiCom special, 24 volt input inverter for my wellpump.  My 2.5kw inverter
just barely won't start the pump.  It tries but the over current trips before
the pump is fully up to speed.  It would probably start the pump if I let it
start unloaded of pressure.

Just about everything is junk that I've picked up here and there.  I bought
the batteries when lead was high and paid 10 cents a pound for a ton of lead
or $200.  Cheaper'n dirt in my book.

My ultimate goal is to have a bank of cheap inverters under the vital bus
breaker panel, each branch having its own inverter.  The light switch in my
bedroom, for example, sends 24 volts through a contactor to a 200 watt
inverter that is sufficient for all the CF lights in the room.  (actually 100
watts would do it but I picked up a bunch of no-name 200 watt unit for $5 ea).
This gives me multi-way redudancy in my power supply (multiple inverters),
minimizes inverter standby losses and minimizes what I spend on things.  I've
probably spent more money on welding cable than anything else.

I had the opportunity last summer to strip out 10 of the AVS electric buses
that were built in nearby Chattanooga, TN.  that got me such nicities as a box
full of KiloVac Czonka contactors, disconnect switches and so on.  Everything
I need to handle the low voltage side of my inverter-per-load scheme.

If I had to guess, I'd guess that I have under $500 in the system, most of
that being for the lead and for welding cable.  the 3.5kw inverter is going to
almost double that, which is why I've held off.  I need to figure out if it's
worth $350 being able to flush the toilet after every use, which is about all
putting the well on the UPS will do.  And enhanced fire protection, of course.

  It'd be just my luck to have a flue fire or something and the generator
choose that time not to start.  Having the fire hose on the UPS will be very
nice.

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
What do you call a blonde's cranial cavity?  Vacuum chamber?

 
You might be able to boost water storage capacity with cheap/free used
fiberglass water purifier tanks. For laundry and toilets they don't
need to be pressurized.