[97453] in North American Network Operators' Group
Re: 24x7 Support Strategies
daemon@ATHENA.MIT.EDU (Alex Pilosov)
Thu Jun 14 20:35:26 2007
Date: Thu, 14 Jun 2007 20:27:49 -0400 (EDT)
From: Alex Pilosov <alex@pilosoft.com>
To: Patrick Giagnocavo <patrick@zill.net>
Cc: nanog@nanog.org
In-Reply-To: <7F6AAAFC-16DE-4167-9764-CEE40268F654@zill.net>
Errors-To: owner-nanog@merit.edu
On Thu, 14 Jun 2007, Patrick Giagnocavo wrote:
> Vegetable oil can degrade much faster than diesel.
>
> What you really want is a large pond at the top of a hill, and another
> large pond at the bottom of the same hill.
>
> When utility prices are low, pump the water to the upper pond. When
> power is needed, have your installed hydropower setup allow water to
> flow through the turbine from the upper pond to the lower pond.
>
> In a city, a very large tank located at the top of the building and an
> equally large one in the bottom with a pipe between the two, should
> suffice. Remember that the "head" or height difference is a large
> factor in determining how much power a hydro setup can generate.
I just wanted to give a little bit more perspective on above: 1 liter of
diesel fuel contains approx 10000WH.
1 liter of water pumped 100 meters up has a potential energy of .272WH
It takes a *lot* of water to provide a measurable difference for a
datacenter of any significant size...
-alex
