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Re: [EnergyPlus_Support] Air Exhaust from zones problem
Using a text editor, edit an example file that has an OA mixer. Then
find the AirloopHVAC object and use the node name of the Demand Side
Inlet Node to search the remainder of the file. Find all occurrences of
this node name. Using this technique, you should be able to see how this
node relates to the other objects.
Pedro Peixeiro wrote:
>
>
> It makes sense what you say. But there is a way to make sure you have
> 100% fresh air, like Mario said. I checked the Input/output reference,
> and it does say the following (relative to Controller:OutdoorAir,
> Field: Maximum/Minimum Fraction of Outdoor Air Schedule):
>
> "If both the above schedules are given values of 1.0, the system works
> at 100% outdoor air"
>
> For now, i'm just trying to make a simple system working by the most
> standard way possible, so I can get myself a systematic procedure that
> assures me adaptability to various situations, so I'll try not to
> forget the previous point.
>
> Anyway, my problem still persists. I added the OutdoorAir:Mixer and
> the Controller:OutdoorAir but the program still gives me the same error:
>
> Severe ** Demand Side Outlet Node Name (Return Air Path or
> ZoneHVAC:EquipmentConnections) not valid = ZONE EQ1 OUTLET NODE
> ~~~ ** Occurs in AirLoopHVAC = UTANN
>
> This node is defined as the outlet node of the AirLoop
>
> I have seen many people wanted to use 100% outside air and does not
> know what to do.
>
> If your OA intake volume rate is the same as the fan capacity and the
> zone air flow rate, the return air is automatically relieved, 100%.
>
> If you do not connect the return air node of the zone to the OA mixer,
> the zone air is also 100% exhausted to the outside environment.
>
> Am I right?
>
> Dr. Li
>
>
>
>
>
> ------------------------------------------------------------------------
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: pedro_peixeiro@xxxxxxxxxxx
> Date: Tue, 1 Jun 2010 08:43:12 +0000
> Subject: [EnergyPlus_Support] Air Exhaust from zones problem
>
>
> hello everyone.
>
> i'm doing my first attempts on HVAC simulation, and i've hit my first
> wall. The system i'm trying to simulate is working with 100% outside
> air, and thus i need all zone air to be exhausted outside, with no
> return. My first idea was to use a AirLoopHVAC:ZoneMizer object to
> bundle all the air from the zones, and use the Outlet Node Name
> defined here as the Demand Side Outlet Node Name in the AirLoopHVAC
> object. But it seems E+ doesnt like my ideia, i'm getting a severe
> error saying the node name in the AirLoopHVAC object is not valid. If
> someone could point me out a hint or two on how to do this, or at
> least reference me an example file that uses a similar system, i would
> be very gratefull. thank you for your time!
>
> Pedro.
>
>
>
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