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RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors
From: "Michael J. Witte" <mjwitte@xxxxxxxx>
Date: Fri, 31 Aug 2007 17:49:38 -0500
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My understanding is that all of the Fuel Factors are per unit of end-use 
energy.  There is no interaction between the various factors.  I will make a 
note to add some clarification to the documentation.

So, for electricity, a reduction in transmission losses would require a  
proportional change to all of the fuel factors for electricity.

Mike


On 27 Aug 2007 at 6:32, Fortier Engineering wrote:

> I went back and double checked all my work and made the difference between the
> two runs was was even larger to make sure just running the similation for the
> two design days was enough to detect a difference in their emissions.  There
> still is no difference betwee the output values.
> 
>   The three input objects for the low simulation are 
> 
>   ENVIRONMENTAL IMPACT FACTORS,
> 0.3, !- Purchased Heating Efficiency
> 3.4, !- Purchased cooling COP 
> 0.25, !- Steam Conversion Efficiency
> 80.7272, !- Total Carbon Equivalent Emission factor from NOx
> 6.2727, !- Total Carbon Equivalent Emission factor from CH4
> 0.2727; !- Total Carbon Equivalent Emission factor from CO2
> 
>   Fuel Factors,
> Electricity, !- Name of existing resource
> kg, !- Measure units (kg or m3) 
> , !- J per measure unit factor
> 1, !- Source energy factor (J/J)
> Const Emissions, !- Source energy schedule  FanAvailSched
> 159.26132, !- CO2 emission factor (g/MJ)
> , !- CO2 emission factor schedule
> 1.85885E3, !- CO emission factor (g/MJ)
> , !- CO emission factor schedule
> 1.34818E-3, !- CH4 emission factor (g/MJ)
> , !- CH4 emission factor schedule
> 3.29232E-1, !- NOx emission factor (g/MJ)
> , !- NOx emission factor schedule
> 2.55776E-3, !- N2O emission factor (g/MJ)
> , !- N2O emission factor schedule
> 1.25834, !- SO2 emission factor (g/MJ)
> , !- SO2 emission factor schedule
> 2.21604E-2, !- PM emission factor (g/MJ)
> , !- PM emission factor schedule
> 2.20060E-2, !- PM10 emission factor (g/MJ)
> , !- PM10 emission factor schedule
> 1.54356E-4, !- PM2.5 emission factor (g/MJ)
> , !- PM2.5 emission factor schedule
> 1.47657E-4, !- NH3 emission factor (g/MJ)
> , !- NH3 emission factor schedule
> 1.51542E-3, !- NMVOC emission factor (g/MJ)
> , !- NMVOC emission factor schedule
> 6.56449E-6, !- Hg emission factor (g/MJ)
> , !- Hg emission factor schedule
> 0, !- Pb emission factor (g/MJ)
> , !- Pb emission factor schedule
> 0, !- Water emission factor (L/MJ)
> , !- Water emission factor schedule
> 0, !- Nuclear High Level emission factor (g/MJ)
> , !- Nuclear High Level emission factor schedule
> 0, !- Nuclear Low Level emission factor (g/MJ)
> ; !- Nuclear Low Level emission factor schedule
>   Fuel Factors,
> Natural Gas, !- Name of existing resource
> kg, !- Measure units (kg or m3) 
> , !- J per measure unit factor
> 1, !- Source energy factor (J/J)
> Const Emissions, !- Source energy schedule
> 50.23439, !- CO2 emission factor (g/MJ)
> , !- CO2 emission factor schedule
> 3.51641E-2, !- CO emission factor (g/MJ)
> , !- CO emission factor schedule
> 9.62826E-4, !- CH4 emission factor (g/MJ)
> , !- CH4 emission factor schedule
> 4.1862E-2, !- NOx emission factor (g/MJ)
> , !- NOx emission factor schedule
> 9.20964E-4, !- N2O emission factor (g/MJ)
> , !- N2O emission factor schedule
> 2.51172E-4, !- SO2 emission factor (g/MJ)
> , !- SO2 emission factor schedule
> 3.18151E-3, !- PM emission factor (g/MJ)
> , !- PM emission factor schedule
> 2.38613E-3, !- PM10 emission factor (g/MJ)
> , !- PM10 emission factor schedule
> 7.95378E-4, !- PM2.5 emission factor (g/MJ)
> , !- PM2.5 emission factor schedule
> 0, !- NH3 emission factor (g/MJ)
> , !- NH3 emission factor schedule
> 2.30241E-3, !- NMVOC emission factor (g/MJ)
> , !- NMVOC emission factor schedule
> 1.08841E-7, !- Hg emission factor (g/MJ)
> , !- Hg emission factor schedule
> 2.09310E-7, !- Pb emission factor (g/MJ)
> , !- Pb emission factor schedule
> 2.1007, !- Water emission factor (L/MJ)
> , !- Water emission factor schedule
> 0, !- Nuclear High Level emission factor (g/MJ)
> , !- Nuclear High Level emission factor schedule
> 0, !- Nuclear Low Level emission factor (g/MJ)
> ; !- Nuclear Low Level emission factor schedule
>   REPORT ENVIRONMENTAL IMPACT FACTORS,
> monthly; !- Reborting Frequency
> 
> SCHEDULE:COMPACT,
>     Const Emissions,           !- Name
>     Fraction,                !- ScheduleType
>     Through: 12/31,
>     For: AllDays,
>     Until: 24:00, 1.0;
> 
>   And for the high the only change is
> 
>   100, !- Source energy factor (J/J) 
> 
>   for the electricity fuel factor. 
> 
>   Just to make sure it wasnt my file, I copy and pasted these three objects into
>   the "CompactHVAC-5ZoneFanCoil.idf" to see if I could detect a difference and
>   still was not able to detect one.
> 
>   I will be happy to upload my files if you would like to look them over.
> 
>   Thanks,
> 
> Joe Lewis
>   Fortier Engineering
> 
> 
> "Griffith, Brent" <brent_griffith@xxxxxxxx> wrote:
>           Changing (lowering) the source energy factor in a Fuel Factors object
>           is
> the right thing to do. It should be working. Check that you have all
> three objects in your input file: "Report Environmental Impact
> Factors", "Environmental Impact Factors" and "Fuel Factors" 
> 
> I think the source data that ships with EnergyPlus is EPA egrid data for
> 1999. There are newer emissions factors in this report: 
> 
> http://www.nrel.gov/docs/fy07osti/38617.pdf
> 
> ________________________________
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of
> fortierengineering
> Sent: Friday, August 24, 2007 1:45 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Environmental Impact Factors & Fuel
> Factors
> 
> I have modeled a building in Pennsylvania and to start I have used the 
> electricity and natural gas fuel factors found in the data sets as well 
> as the Environmental Impact Factors to determine the emissions 
> contributions from this building.
> 
> When I spoke with the local electricity company they advised me that 
> the transmission losses for this location were lower than the state 
> average. They did not have information reguarding the exact g/J of 
> emission break down.
> 
> I cannot figure out what field controls the electricity transmission 
> losses. 
> 
> I thought it was the "J per measured unit factor" or the "source energy 
> factor", but changing either of these fields does not affect any of the 
> emission factors (ran the simulation at 1.827, then 1, then 10 and the 
> emission totals turned out exactly the same).
> 
> What are these two fields used for if they have no effect on the final 
> data, and what is the best way to express a reduction in transmission 
> losses?
> 
> Thank you,
> 
> Joseph Lewis
> Fortier Engineering
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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Follow-Ups:
- RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors
  - From: Fortier Engineering

References:
- RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors
  - From: Griffith, Brent
- RE: [EnergyPlus_Support] Environmental Impact Factors & Fuel Factors
  - From: Fortier Engineering

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