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Re: [EnergyPlus_Support] Re: Confusion over Fan in AirFlow Network
Ooi:
I don't have suggestiongs how much attic infiltration is. You may try to
find values in other publications.
The AirflowNetwork model requires an air primary loop. Any coils and fan
have to be a part of the loop. The allowed coil types are listed in the
Energy+.idd and Input Output Reference. An example input file of
AirflowNetwork_Multizone_House.idf uses UNITARYSYSTEM:HEATPUMP:AIRTOAIR. The
unitary system uses allowed coil types. The answer to your question is that
if a compact unitary system uses allowed coil types, it should work.
Hope my answers help.
Best regards,
Lixing
----- Original Message -----
From: "ooikoonbeng2004" <ooi_kb3@xxxxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wednesday, July 04, 2007 12:36 AM
Subject: [EnergyPlus_Support] Re: Confusion over Fan in AirFlow Network
> Lixing,
>
> Many thanks for how to disable the AirFlow Network.
>
> i shall try Infiltration first. Any adice on the variables to use
> for this object if the infiltration to the attic, space between the
> horizontal overhang ceilings and the sloping roof, is only through
> the corrugations in the roofing metal sheets as they are nailed to a
> horizontal wood?
>
> Meanwhile, is Compact HVAC:System:Unitary supported if i use the
> choice as MULTIZONE WITH DISTRIBUTION or MULTIZONE WITH DISTRIBUTION
> ONLY DURING FAN OPERATION in the AirflowNetwork Control field in the
> AirflowNetwork Simulation object?
>
> regards,
> ooi
> Meanwhile can you let me know if --- In
> EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>>
>> Ooi:
>>
>> It seems the input file does not specify a fan as Zone2WindACFan,
> so that
>> the first error message occurs (GetFanIndex: Fan not
> found=Zone2WindACFan).
>> In other words, Zone2WindACFan is not listed in fan index. You may
> define
>> the fan in the AIRFLOWNETWORK:DISTRIBUTION:COMPONENT CONSTANT
> VOLUME FAN
>> object. Since the fan is not listed in the fan index, the prgram
> can not go
>> any further.
>>
>> My suggestion is to disable the AirflowNetwork model first to see
> whether
>> you can eliminate the first error or not. The model disablement is
> to use
>> the choice of NO MULTIZONE OR DISTRIBUTION in the AirflowNetwork
> Control
>> field in the AirflowNetwork Simulation object. If you still have
> problems,
>> please upload the file. I will take a look.
>>
>> By the way, Window AC is not supported for the time being if you
> use the
>> choice as MULTIZONE WITH DISTRIBUTION or MULTIZONE WITH
> DISTRIBUTION ONLY
>> DURING FAN OPERATION in the AirflowNetwork Control field in the
>> AirflowNetwork Simulation object
>>
>> Thanks.
>>
>> Lixing Gu
>>
>> ----- Original Message -----
>> From: "ooikoonbeng2004" <ooi_kb3@...>
>> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
>> Sent: Monday, July 02, 2007 2:06 AM
>> Subject: [EnergyPlus_Support] Confusion over Fan in AirFlow Network
>>
>>
>> > Confusion over Fan
>> >
>> >
>> > Hello everyone,
>> >
>> > i am starting to use the AirFlow Network with only the
>> > MultiZone:Surfaces referring to the SIMPLE house example.
>> >
>> > From the .err file, a zone needs two surfaces and i have added a
>> > door to each zone. So, correct me if i am wrong, the air in the
>> > AirFlow Network goes through ceiling crack/leakage and door
> leakage.
>> >
>> > As i am only studying the thermal aspects of the building
> envelop, i
>> > do not use a Direct air or fan as in the Simple House example.
> But i
>> > have a Window AirConditioner in the second zone.
>> >
>> > The messages in .err file, includes:
>> >
>> > GetFanIndex: Fan not found=Zone2WindACFan
>> > GetAirflowNetworkINput: The fan type defined in
>> > AIRFLOWNETWORK:DISTRIBUTION:COMPONENT CONSTANT VOLUME FAN =
>> > ZONE2WINDACFAN is not allowed etc.
>> >
>> > The 'Fan' in the error message can only refer to the fan in
> Window
>> > AC. But how do i enter the index of this fan or overcome the
> errors
>> > in the .err file?
>> >
>> > kind regards,
>> > ooi
>> >
>> >
>> >
>> >
>> > 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 not allowed -- please post any files to the
> appropriate
>> > folder in the Files area of the Support Web Site.
>> >
>> > 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 not allowed -- please post any files to the appropriate
> folder in the Files area of the Support Web Site.
>
> 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:
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Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
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