RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors

["Michael J. Witte" <mjwitte@xxxxxxxx>]

On 3 Sep 2007 at 11:49, Fortier Engineering wrote:

> If what you say is true, then the TDV functionality described in the literature
> is not functional because the emissions will not change no matter what the
> scheduled values are.

My understanding is that TDV only applies to source energy.  It is a very 
specific methodology for California.  


>   Does this also that the emission factors as listed in the literature by state
>   for electricity will not yield acceptable results unless they are multiplied
>   by the source energy factor outside of energy plus?
> 

No.  The emissions factors in the NREL report are all per unit of delivered 
electricity (per kWh at the building meter).  The various source energy 
efficiencies (for coal, gas, hydro, nuclear, etc.) are already rolled into each 
emission factor.  For other sources, you will need to confirm what basis is 
used for the factors.  It could be per unit of fuel input to the power plant, 
per unit of electricity out from the power plant, or per unit of delievered 
electricity.

Mike







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