Re: [TRNSYS-users] PID controller and time schedule

[David BRADLEY <d.bradley@tess-inc.com>]

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

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