[Equest-users] air flow sizing

sambhav tiwari tiwari.sambhav at gmail.com
Mon Jun 11 22:38:07 PDT 2012


Hi All,
          The cfm for zone is sized based on room and supply air
temperature deltaT and room sensible heat load  ie
cfm=RSHL(btu/hr)/(1.08XdeltaTinF)

similarly the cfm for the latent load is
cfm=RLHL(btu/hr)/(4840XdeltaW) Where deltaW is Ws-Wr  ,Ws is humidity
ratio lb of water/lb of dry air   of supply air at 55F and Wr is room
design humidity and RLHL is latent load in btu/hr

the total cfm should be sum of both due to deltaT and deltaW

But equest takes only due too sensible load because there is no where
option to input supply air humidity and room design humidity
then how it takes in account of cfm due to deltaW?

Thanks
Sambhav


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