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Re: [EnergyPlus_Support] Re: opening factors and ventilation control mode
Astrid:
My answers will follow your questions.
> control mode "temperature", and as far as I understood it, the
> settings at "airflownetwork:multizone:zone" define the window opening
> percentage in relation to the temperature difference, right?
A: Your understand is correct.
> the settings in "airflownetwork:multizone:component detailed opening"
> opening factor 1 defines the smallest opening angle/width and 4 the
> largest, correct?
A: Yet, it is correct. The largest number is determined by the number you
enter in the Number of sets of Opening Factor Data field. The maximum is 4
and the minimum is 2.
> largest, correct? So "airflownetwork:multizone:zone" defines, how the
> opening percentage varies in between. But what effect do opening
> factor 2 and 3 have in this case?
The opening factor is calculated based on given conditions in either
airflownetwork:multizone:zone or airflownetwork:multizone:Surface. Then the
opening factor is used in a subroutine to deal with the
AirflowNetwork:Multizone:Component:DetailedOpening object. The subroutine
first checks two sets of opening factor data to make "the opening factor i
<= opening factor <= the opening factor i+1". For example, the opening
factor 1 is 0, opening factor 2 is 0.2, and opening factor 3 is 1.0. The
calculated opening factor is 0.6. Therefore, it is located between factor
data sets 2 (0.2) and 3 (1.0). Then other values of discharge coefficient,
...., will be linearly interpolated between data sets 2 and 3. Detailed
description is given in the Group Airflow Network in the InputOutput
Reference.
> What I want to do is, using a different maximum opening angle of the
> window in summer and in winter, so I was hoping this would be possible
> by using an additional opening factor...
> Hope this explains my question better?
You can not change any values defined in the
AirflowNetwork:Multizone:Component:DetailedOpening objects during time.
However, you can change schedule values defined in the Ventilation Control
Zone Temperature Setpoint Schedule Name field in either
airflownetwork:multizone:zone or airflownetwork:multizone:Surface to meet
your needs.
Please let me know if you need more information.
Thanks.
Lixing
----- Original Message -----
From: "astrid.roetzel" <astrid.roetzel@xxxxxxxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Thursday, February 12, 2009 6:41 AM
Subject: [EnergyPlus_Support] Re: opening factors and ventilation control
mode
> Dear Lixing,
>
> Thank you very much for the quick answer! I am using ventilation
> control mode "temperature", and as far as I understood it, the
> settings at "airflownetwork:multizone:zone" define the window opening
> percentage in relation to the temperature difference, right? And in
> the settings in "airflownetwork:multizone:component detailed opening"
> opening factor 1 defines the smallest opening angle/width and 4 the
> largest, correct? So "airflownetwork:multizone:zone" defines, how the
> opening percentage varies in between. But what effect do opening
> factor 2 and 3 have in this case?
> What I want to do is, using a different maximum opening angle of the
> window in summer and in winter, so I was hoping this would be possible
> by using an additional opening factor...
> Hope this explains my question better?
>
> Astrid
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>>
>> Astrid:
>>
>> Could you provide specific information on names of field and object
> related
>> to more than two opening factors?
>>
>> Best regards,
>>
>> Lixing
>>
>> ----- Original Message -----
>> From: "astrid.roetzel" <astrid.roetzel@...>
>> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
>> Sent: Wednesday, February 11, 2009 3:22 PM
>> Subject: [EnergyPlus_Support] opening factors and ventilation
> control mode
>>
>>
>> > Dear experts,
>> >
>> > I am not sure if I understood correctly, how the ventilation control
>> > mode interacts with the opening factors if there are more than two of
>> > them. Can anyone help me?
>> > Thanks a lot,
>> >
>> > Astrid
>> >
>> >
>> >
>> > ------------------------------------
>> >
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>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> The primary EnergyPlus web site is found at:
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>
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>
> Attachments are not allowed -- please post any files to the appropriate
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>
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> Yahoo! Groups Links
>
>
>
>
------------------------------------
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