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

[yun-shang chiou <yunshangchiou@xxxxxxxxx>]

Linda:

 

Thanks for the direction.

 

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 “3” is assigned as the default purchased cooling COP value. I don’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 don’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?

 

Thanks!

 

Chiou

--- On Wed, 3/18/09, Linda Lawrie <linda@xxxxxxxxxxxxxx> wrote:

From: Linda Lawrie <linda@xxxxxxxxxxxxxx>
Subject: Re: [EnergyPlus_Support] How does the site to source energy conversion work?
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Date: Wednesday, March 18, 2009, 1:05 PM

THey are the numbers entered/defaulted in the
FuelFactors
and the
EnvironmentalImpact Factors

objects.

EnergyPlus Development Team.

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