Re: [EnergyPlus_Support] purchased air

["Michael J. Witte" <mjwitte@xxxxxxxx>]

1.  If you are using the outside air flow option in Purchased Air, this will
not work for annual loads.  Set this to zero and introduce outside air using
INFILTRATION or VENTILATION.

2.  The latent loads in Purchased Air are not very meaningful.  Perhaps we
should not even report them any longer.  The latent portion of the Purchased
Air total cooling load is merely whatever is required to take the current
purchased air supply flow mixed air humidity ratio and change it to match the
specified supply air humidity ratio.

Mike


On 4 Sep 2004, at 0:00, teklay Weldeabzgi wrote:

>
>  i am trying to see the annual cooling load reduction
> using roof and wall insulation. my model is purchased
> air model. and when i see the results from the
> simulation; with insulation in roofs the sensible
> cooling energy reduces while the latent heat gain
> increase. this result is seen in the reports Purchased
> Air Sensible Cooling Energy[J]and Purchased Air Total
> Cooling Energy[J]. the result shows the saving from
> Purchased Air Sensible Cooling Energy[J] is greater
> than the saving from Purchased Air Total Cooling
> Energy[J]in using insulation. but i can't understand
> why insulation increases the latent load. is there any
> reason for this.
> tek
>
>
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx




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