[Equest-users] Random Tip-of-the-Day: EQUIP-RAD-FRAC

[Bishop, Bill via Equest-users]

You can designate the radiative/convective split of the heat gains from lighting using the LIGHT-RAD-FRAC keyword, the value for which can be accessed via the Space -> Lighting tab.
While there are (currently) no such input options for heat gains from Equipment and Internal Energy Sources, the keywords exist in DOE-2.2 and can be used in the input files for your eQUEST models.
For example, you can satisfy the requirement in PNNL's PRM Reference Manual<http://www.pnnl.gov/main/publications/external/technical_reports/PNNL-25130.pdf> for a default 20%/80% radiative/convective split for receptacle loads by adding this expression to the "SET-DEFAULT FOR SPACE" section of your input file:

   EQUIP-RAD-FRAC   = (
{if (#L("FLOOR-WEIGHT") > 0.  .or.  #RV(#L("EQUIP-SCHEDULE",0)) !=0)
  then unused
  else 0.20     /* Per PNNL-25130 90.1-2010 PRM Reference Manual */
  endif} )

The SOURCE-RAD-FRAC keyword is also available, for describing the heat gains from Internal Energy Sources.

Cheers,
~Bill

[cid:image002.png at 01D1BB58.F3BF4610]

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

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134 South Fitzhugh Street                 Rochester, NY 14608

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bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>             www.pathfinder-ea.com<http://www.pathfinder-ea.com/>

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