[TRNSYS-users] PID controller and time schedule

[David BRADLEY]

Fanfan,
   I am not aware of a way in TRNSYS to actually model the CO2 
concentration in the space. Typically, I have assumed that CO2 
concentration varies according to the occupancy of the space and I vary 
the mechanical ventilation rate according to the fraction of occupancy. 
This is, of course, a significant simplification. There are some 
components in the TESS Applications Library that allow you to set 
weekday, saturday, and sunday schedules using a slider-plugin. You can 
also define a few Type14s (one for weekdays, one for weekends, etc.) and 
then combine them using either an equation or the forcing function 
sequencer (Type41). If you have a very complex schedule, you can enter 
it into Excel as hourly values then use a Type9 data reader to read the 
excel file.
Kind regards,
  David


On 9/25/2011 20:32, fanfan fanfan wrote:
> Dear trnsys users,
> I am try to use a PID Controller to modulate the indoor co2 
> concentration. According to input signal there will be easy to output 
> the control signal from the PID controller, however, co2 source 
> concentration must be varied base on working time schedule. How to 
> input this proportion figure between the number of people and 24 hours 
> by using trnsys tpye? For TRNbuild module, seems impossible to output 
> value directly from schedule setting, therefore, I try to use type 14 
> to add the number of each hour. Unfortunately, it is difficult to 
> integrate those type14 to form a time figure.
> Is there anyone have a experience on co2 base demand control, please 
> give me some suggestions.
> Thank you very much.
> Best regards
> fanfan
> IGSES, Kyushu University Japan
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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