[Vwdiesel] Genset RPM and Diesels

[Area31 Research Facility]

Mark,

I'll try to remember.  When someone does not sign their post I try to
observe that it is safest to address the reply to the identified sender IMO.

What you said below makes sense and is what I had thought.  You explained it
more clearly.

Rob

----- Original Message -----
From: "Shirley, Mark R" <MarkRShirley at eaton.com>
To: "Area31 Research Facility" <stephensrw at stn.net>; "James Hansen"
<jhsg at sasktel.net>; <vwdiesel at vwfans.com>
Sent: Monday, May 23, 2005 1:15 PM
Subject: RE: [Vwdiesel] Genset RPM and Diesels




> What Shirley, Mark R has just said makes a lot of good sense.

Uh, you can just call me Mark if you like...  :)

> My purpose of experimenting in the ultra low RPM regieme is to see how
> little the hourly fuel consumption could go, despite a drop
> in efficiency.
> If one uses the plant merely to charge a large battery bank
> that feeds the
> load through an electronic inverter then frequency and voltage are not
> critical.  That is how I plan to run a smaller diesel as a
> secondary/prime
> source working in tandem with a large wind turbine here eventually.
>
> The idea of torque backup on the plant I may build to power a welding
> generator directly makes really good sense!  Thank you Shirley, Mark R
>
> Rob
>

Lowest brake specific fuel consumption coincides with peak torque.  Your
engine will always get the best economy when fully loaded at peak torque
rpm.
You can lower your consumption by not using all the available torque at any
given rpm, but if you need the full available torque, running at peak torque
rpm will keep your costs and consumption lowest.