Re: Now:Power/Generators (Was: Re[2]: telehouse - 25 broadway)

["Robert Boyle" <robert () tellurian com>]

---- Original Message ----
From: ltd () interlink com au
To: robert () tellurian com
Subject: Re: Now:Power/Generators (Was: Re[2]: telehouse - 25 
> broadway)
Date: Sun, 16 Sep 2001 16:02:14 -0700

> [ staying from nanog to power-generation again... :-) ]

> many Diesel gensets can be "converted" to operate on LPG/Natural Gas 
> instead.
> they typically end up with a higher operating temperature (but not 
> significantly so), and may need some upgrades to some of the 
> auxiliary 
> equipment (fuel pump, cooling system / heat-exchangers / radiators), 
> as 
> well as some relatively minor mods to the engine itself.  you also 
> need a 
> Governor that knows that its using LPG/NG rather than Diesel - the 
> characteristics of how the engine behaves/responds are quite 
> different.

Also, LPG/NG converted diesel engines are de-rated 400kW diesel may
become 280kW LPG/NG. 

> on the topic of Oil Filters, one of the things that can be done to 
> help 
> "clean" the oil in a Diesel genset is to add a Centrifugal Pump to 
> seperate 
> the solids from the oil.  this makes it possible to extend the 
> maintenance 
> periods (at least for Oil Filter changes) of Diesel gensets as well 
> as 
> improve the lifetime of the oil itself.
> (Diesel gensets are fairly oil-hungry.  that is normal).

I also install an additional bypass oil filter which filters much
smaller particles than the standard full-flow filter. This can also
extend the maintenance interval and engine life. Using a filter
extension plate and a remote filter mounting kit allows for faster
and cleaner oil filter changes. Ensuring adequate genset cooling
through a properly sized radiator, pump, and plumbing will prevent
the oil from coking and will help keep its lubricating properties
much longer.

In our application, we are using diesel as a primary backup to the
grid and the Capstone LPG/NG turbine as supplemental/backup/long
runtime AC power. We have very reliable gas service, but diesel fuel
does go bad and I don't want to store more than 24-48 hours of fuel
in the building.

-Robert