Re: [EnergyPlus_Support] venting schedule

["Michael J. Witte" <mjwitte@xxxxxxxx>]

In COMIS Zone Data, the Venting Schedule is an on/off control for venting.  If 
this schedule is specified, then venting is active whenever the schedule value 
is greater than zero.  When the schedule value is zero, venting is disabled for 
that zone.  This schedule is not used as a multiplier to the opening factor.  
So, in your example below, the opening factor should always be 0.5.

If venting controls are specified in COMIS Surface Data, they will override the 
venting controls in COMIS Zone Data.

Note that venting controls only work for exterior windows.

This is according to the descriptions in the Input Output Reference, p. 249-
257, pdf p. 275-283).

If you find the behavior to be different from this, please send an example 
input file as a zip attachment to energyplus-support@xxxxxxxx or upload it to 
the files area in the yahoo support group.

Mike





On 6 Mar 2004, at 15:22, Mohit Mehta wrote:

> 
> hi:
> 
> in COMIS Zone Data, if i set the ventialtion control mode to CONSTANT (windows
> open at all times independent of conditions, which is what i want) CAN i then
> modulate these openings on a time of day schedule? for example by using the
> Venting Schedule.
> 
> now there are 2 places where i can specify this Venting Schedule - Zone Data and
> Surface Data. also in Surface Data it is mandatory to input Window Openness
> Factor for each opening. once i enter this factor then it disregards any venting
> schedule that i may enter in any of the above 2 places mentioned - the opening
> areas are modulated accordning to the openness factor for ALL hours. 
> 
> example case - control mode CONSTANT, openness factor set to, say 0.5 (half
> open), and a venting schedule (either 1.0 or 0.5) specified too (in Surface
> Data). result - Window/Door Venting Opening Factor = 0.00 (opening closed all
> all hours)... shouldn't it be 0.5*1.0 or 0.5 depending on time of day venting
> schedule??? 
> 
> basically what is happening is if venting schedule is specified at Zone level
> then it is overridden (ignored) by openness factor and if it is entered in
> Surface Data level - it results in zero. 
> 
> please can anyone explain what i am doing incorrectly or if i am missing
> something. thank you.
> 
> ~mohit
> 
> 
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



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