[EnergyPlus_Support] Re: Ventilation heat losses / gains

["Ana Rui Oliveira" <anarui.oliveira@xxxxxxxxx>]

Thanks so much!
But, is it just a problem with the reported variable, or is 
ventilation incorrectly affecting the simlation loads? I already 
estimated loads with Purchased Air and need to know if they're over-
estimated.

Thanks again,
Ana.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> Ana:
> 
> Your observation is right. Results of the ventilation heat gain are 
not 
> right. The problem is that the report variable of ventilation 
sensible heat 
> gain was not initialized. The problem was raised after Version 2.2 
release 
> and was fixed for the next release (CR 7519). Results of the 
ventilation 
> heat loss are correct. The workaround is to use infiltration 
objects instead 
> of ventilation objects, since you don't use fan power.
> 
> Please let me know if you have any problems.
> 
> Lixing
> ----- Original Message ----- 
> From: "Ana Rui Oliveira" <anarui.oliveira@...>
> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
> Sent: Tuesday, September 30, 2008 11:16 AM
> Subject: [EnergyPlus_Support] Ventilation heat losses / gains
> 
> 
> Hi.
> 
> Kind of urgently...
> 
> Any ideia why the ventilation heat gain in a Summer week (both 
sensible
> and total) would be of a much higher order of magnitude than the
> ventilations loss in a Winter week?
> 
> Ventilation is done using AirFlow»Ventilation objects with ero "Fan
> Pressure Rise" and I'm just using Purchased Air to control
> temperatures, so there shouldn't be any temperature rise due HVAC
> components?...
> 
> I uploaded a file with some prt screens of these graphic results, to
> facilitate interpretation.
> 
> Appreciate any help...
> Ana.
> 
> 
> 
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