Re: [EnergyPlus_Support] Re: Zone Exhaust and Return Fan

[Vinay Devanathan <vinay.devanathan@xxxxxxxxx>]

Which HTML report are you looking at? Like the sub-heading under which you are finding this? If you are looking at Fan Reports in Equipment Summary/Component Sizing Summary, then it might show you the Max Flow Rate (airflow capacity) possible through the fan which might be the same in both Supply and Return Fan case to take care of the airflow in case exhaust fan is not working at any hour.

On Tue, May 1, 2012 at 12:37 PM, thimmannaharshana <thimmannaharshana@xxxxxxxxx> wrote:

 

Thanks for your response and sorry I didn't read your question correctly.

Exhaust fans are modeled as zone equipment fans similar to the ones in example file. When I looked at the hourly results, it make sense.The return flow from the zone is equal to the supply flow minus the exhaust flow and the same is true at the system level. However, the html report shows the same flow for both supply and return fans.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Vinay Devanathan <vinay.devanathan@...> wrote:
>

> How have you modeled the exhaust fan?
>
> On Tue, May 1, 2012 at 10:45 AM, thimmannaharshana <

> thimmannaharshana@...> wrote:
>
> > **

> >
> >
> > Hi all,
> >
> > I have modeled supply, return and exhaust fans for a system. when I look
> > at the results, the amount of airflow is same for both supply and return
> > fan. Energy plus is not accounting for the amount of exhaust flow while
> > calculating the return flow. The exhaust fan flow rate is reported
> > separately.
> >
> > Supply fan -6500 cfm
> > Return Fan -6500 cfm
> > Exhaust fan -550 cfm
> >
> > I am using energyplus for LEED submission and i guess this is a problem.
> >
> > Does any one know how to solve this and get the correct return airflow?
> >
> > Thanks in advance,
> > Harshana
> >
> >
> >
>
>
>

> --
> Vinay Dev
>

--

Vinay Dev

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