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



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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