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[EnergyPlus_Support] Re: Partially opened windows modulated by a schedule

Thanks for the suggestions - I have tried them all - they don't seem to work.

Regards temperature or other regulation mechanism: this may work - but isn't what I want. I would want windows to be opened or closed independent from temperature, humidity or comfort considerations (assuming occupants don't know about these, which is probably a fair assumption). "Constant" seems to only know on/off:

I/O says: Note that "Constant" here means that the size of each opening is fixed while venting; the air flow through each opening can, of course, vary from timestep to timestep.

Using a continuous or fractional schedule does not change the situation (I've tried this: air change rates are exactly the same as in on/off).

I can change the opening width in the Surface sections, but then it stays that way throughout the run time.

Any other ideas?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, oscar hernandez <oscarhernandez_81@...> wrote:
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> In the detailed opening you can modify the open ratio of the crack (4 different openings you can add), have you try with this ?
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> Oscar.
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> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: jeannieboef@...
> Date: Mon, 2 Jul 2012 06:07:35 +0000
> Subject: [EnergyPlus_Support] Re: Partially opened windows modulated by a schedule
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>       Correction. The temperature limits are schedules. You don't have to change them with EMS...they can stay set. I was looking at velocity modulation.
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> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jean marais" <jeannieboef@> wrote:
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> > Very good point. Venting availability is on/off regardless of whether you use "constant", "temperature" or other venting schemes. I don't think there is a way to change the opening area with a schedule directly. The only way that I can think of is to use the temperature scheme and change the temperature limits via EMS...I looked into this a while ago, due to another problem I was having. The problem was solved without imploying the EMS so I didn't have to complete it...VERY time consuming to do this at zone level.
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> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "k.rosemeier" <k.rosemeier@> wrote:
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> > > It is my understanding that with ventilation control mode "Constant" in AirflowNetwork:MultiZone:Zone a venting availability schedule can only be on or off.
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> > > A way I found for altering the window opening fraction with control mode "Constant" is by changing the factor in AirflowNetwork:MultiZone:Surface for the LVO in question. Yet: while this seems to work with an on/off venting availability schedule, I cannot modulate the opening fraction with it.
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> > > Is there a way of modulating the opening fraction based on a schedule (regardless of temperatures and comfort parameters)? 
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> > > I want model: windows fully opened at certain times during the day, but only left ajar over night.
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