Re: [EnergyPlus_Support] How does the site to source energy conversion work?

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

If you disagree with the defaults, you are free to change
them.

I do not remember the FuelFactor defaults -- again, if you want something
specific, you probably should enter that.

EnergyPlus Development Team

At 08:42 PM 3/18/2009, yun-shang chiou wrote:
> I have some follow-up questions
> after checking the Environmental Impact Factors and Fuel Factors sections
> in the InputOutputReference document.
>  
> For the Environmental Impact Factors, I can see why â??3â?? is assigned
> as the default purchased cooling COP value. I donâ??t quite understand
> why the default efficiency of purchased heating (from natural gas) is set
> at 0.3. I thought the AFUE of gas-boiler/furnace is required to be at
> least 0.75.  I have little exposure in this area, can anyone
> enlighten me if I miss something.    
>  
> For Fuel Factors, I donâ??t see any description of the default values of
> source-site energy conversion factor. If one never specifies the Fuel
> Factors object in the simulation (as my case), what will determine the
> conversion factors of various types of fuels? 
>

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