[EnergyPlus_Support] Mechanical night ventilation - Other doubts

["juobatista" <juobatista@xxxxxxxxxxxx>]

Dear Lixing,
 
After your suggestions, I've tried to simulate mechanical night ventilation by airflow network, using a zone exhaust fan. The simulation wasn't successful and the err. file shows as follows:
 
Severe  ** ValidateExhaustFanInput: Zone name in AirflowNetwork:MultiZone:Component:ZoneExhaustFan  = Z_QCAS does not match the zone name in ZoneHVAC:EquipmentConnections
   ** Severe  ** ValidateExhaustFanInput: Zone name in AirflowNetwork:MultiZone:Component:ZoneExhaustFan  = Z_QCAS does not match the zone name
   **   ~~~   ** the surface is exposed to Z_QCAS:WALL01

** Severe  ** ValidateExhaustFanInput: Fan:ZoneExhaust is not defined in AirflowNetwork:MultiZone:Component:ZoneExhaustFan
   **   ~~~   ** Zone Air Exhaust Node in ZoneHVAC:EquipmentConnections =E_QCAS OA

After testing several possibilities, I'm  not having any success. If you or another person could help me, I'll be very grateful. This simulation is essential for my thesis . My Input information is subscribed below.

AirflowNetwork:MultiZone:Component: Surface
Surface Name = Z_QCas:Wall01
Leakage Component Name = Z_QCAS
External Node Name = no_fanqcas(sala1)

AirflowNetwork:MultiZone:Component:ZoneExhaustFan: 
Name = Z_QCAS

ZoneHVAC:EquipmentList:
Name = Z_QCAS
Zone Equipment 1 Object Type = Fan: ZoneExhaust
Zone Equipment 1 Name = Z_QCAS

ZoneHVAC:EquipmentConnections:  
Zone Name = Z_QCAS
Zone Conditioning Equipment List Name = Z_QCAS
Zone Air Inlet Node or NodeList Name = Zone_QCAS Inlets
Zone Air Exhaust Node or NodeList Name = E_QCas Oa
Zone Air Node Name = Z_QCas Node
Zone Return Air Node Name = Z_QCas Return Air

Fan:ZoneExhaust
Name = Z_QCAS
Air Inlet Node Name = E_QCas Inlet
Air Outet Node Name = E_QCas Oa

NodeList

Z_QCas Return Air (Name) Z_QCas Return Air (Node 1 Name)
Z_QCas Node (Name) Z_QCas Node (Node 1 Name)

Zone_QCAS Inlets (Name) E_QCAS Inlet (Node 1 Name)

OutoorAir:Node
Name = E_QCas Oa

Thanks a lot,

Juliana

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> Juliana:
> 
> The AirflowNetwork model cannot work with ZoneInfiltration and
> ZoneVentilation objects together. There are two types of fans allowed in the
> AirflowNetwork model: Supply constant volume fan and Zone exhaust fans.
> Please see an example file of AirflowNetwork_Multizone_SmallOfiice.idf.
> 
> Thanks.
> 
> Lixing 
> 
> -----Original Message-----
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Liam O'Brien
> Sent: Monday, February 01, 2010 3:18 PM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Mechanical night ventilation
> 
> Hi Juliana,
> 
> Unfortunately I don't have enough experience with explicit airflow networks
> to offer advice on this.  I think the error messages you're getting are
> relative to the fact that you can't really mix detailed airflow and
> simplified components.  So if you want some detailed objects, you'll likely
> have to go all the way with that strategy.  Good luck.  
> 
> Liam
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "juobatista" <juobatista@>
> wrote:
> >
> > Hi Liam, thanks for your response!
> > 
> > I tried this solution, but it wasn't successful. It seems these objects
> "zone ventilation" and "zone infiltration" cannot be simulated among air
> flow network (see below the err reports): 
> > 
> > 1) First simulation:
> > ** Warning ** GetAirflowNetworkInput: AirflowNetwork:SimulationControl
> object, Specified AirflowNetwork Control = "MultizoneWithoutDistribution"
> and ZoneVentilation objects are present.
> >    **   ~~~   ** ..ZoneVentilation objects will not be simulated.
> > 
> > 2) Second simulation:
> > ** Warning ** GetAirflowNetworkInput: AirflowNetwork:SimulationControl
> object, Specified AirflowNetwork Control = "MultizoneWithDistribution" and
> ZoneVentilation objects are present.
> >    **   ~~~   ** ..ZoneVentilation objects will not be simulated.
> > 
> > That's the question: I need to simulate with air flow network, to obtain
> results related to natural ventilation, considering windows opening and
> variable wind direction. So, there is some way to simulate a fan operating
> "inside" the air flow network option?
> > 
> > Thanks in advance,
> > 
> > Juliana
> > 
> > 
> > 
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Liam O'Brien" <liambrn@>
> wrote:
> > >
> > > A simpler solution to an airflow network, would be to use
> ZoneVentilation.  You can have the ventilation rate dependent on the indoor
> and outdoor temperatures.  To restrict ventilation to 21:00 to 7:00 using a
> compact schedule, but I believe you'll have to allow it upto: 7, not upto:
> 21, and upto: 24.  You can also predict fan energy using the ZoneVentilition
> object.
> > > 
> > > Liam O'Brien
> > > 
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "juobatista" <juobatista@>
> wrote:
> > > >
> > > > Hi!
> > > > 
> > > > I simulated a model of a house with natural ventilation during day
> hours, using airflow network in Energy Plus. But I need to combine natural
> ventilation with mechanical night ventilation (9 P.M to 7 A.M). The system
> consists in a simple intake fan, positioned in a hole on the wall, with
> constant flow, operated by electricity. 
> > > > 
> > > > How can I do it? I tried zone infiltration (zone air flow) + a
> apropriated schedule but it wasn't successful. 
> > > > 
> > > > Thanks!
> > > > 
> > > > Juliana
> > > >
> > >
> >
> 
> 
> 
> 
> ------------------------------------
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are currently allowed but be mindful that not everyone has a
> high speed connection.  Limit attachments to small files.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> Yahoo! Groups Links
>




------------------------------------

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/