Subject: [eman] Terminology: demand

From: Juergen Quittek <[email-masked]>
Date: Wed, 27 Jul 2011 11:07:26 -0400

Hi John,

In draft-parello-eman-definitions-00 you define demand as:

>      Demand 
> 
>        Demand is an average of Power measurements over an interval(s) 

I disagree. Demand is a power measurement over a long time interval. There is no need for having multiple power measurements and averaging them. Of course I agree that this would be a way to implement demand measurements. But the definition of a term should not falsely restrict it to a certain implementation.
Please let's take IEEE or other bodies dictionary terms.

"an interval(s)" --> "an interval"

>        of time and typically expressed in kilowatt hours.  This 
>        measurement is significant because some utilities or energy 

remove "This measurement is significant because"

>        providers bill by Demand measurements as well as for maximum 
>        Demand per billing periods.  Power values may spike during 
>        short-terms by devices, but Demand measurements recognize that 
>        maximum Demand does not equal maximum Power during an interval. 

Thanks,

    Juergen