[esp-r] Re: plant control: sense plant output

[Aizaz Samuel]

Bernd,

Take a look at the ADEPT project at sesg.strath.ac.uk, The project contains 
control files that control the WCH pump based on sensing thermostat output. 
Do note that the plant database is non-standard.

Closer to home you may look at exemplars > systems and controls > with wet 
central heating systems. This model has a pump but does not have a control 
loop for it.

Regards,
Aizaz


On Monday 11 August 2008 14:51, Bernd B. wrote:
> Dear all,
>
> I would like to control the flow of a pump (type 15, variable speed
> domestic WCH pump) according to the temperature of a specific plant
> component. In my case the component is called "air & water temperature
> source" (type 24).
>
> I already tried the controller types 9 (senses plant output; actuates
> flow), 16 (senses plant output; actuates variable), 22 (senses plant
> output; mass ration). All were connected with an on/off-controller. I got
> results without an error during the simulation. However the pump didn't run
> or react. I have already checked the setpoint and so on.
>
> Does anyone know how to control the pump according to plant component
> output (temperature) ??? Did I use the right components for that?
>
> Thanks!
> Best regards
> Bernd
>
>
> Ctl File:
>
> no overall control description supplied
> * Plant
> no plant control description supplied
>    3  # No. of loops
> * Control loops
> # senses var in compt. 5: Source @ node no.  1
>    -1   5    1    0    0  # sensor
> # plant component   4:Pump_u @ node no.  1
>    -1    4    1    0  # actuator
>     1 # No. day types
>     1  365  # valid Fri-01-Jan - Fri-31-Dec
>      1  # No. of periods in day
>     9    8   0.000  # ctl type, law (On-Off control.), start @
>       7.  # No. of data items
>   -1.00000 19.00000 20.00000 0.00500 0.00000 0.00000 0.00000
> * Control loops
> # reads measurements from a boundry data file.
>    -5    3    0    0    0  # sensor
> # plant component  5: Source @ node no.  1
>    -1   5    1    0  # actuator
>     1 # No. day types
>     1  365  # valid Fri-01-Jan - Fri-31-Dec
>      1  # No. of periods in day
>    12    6   0.000  # ctl type, law (Null controller.), start @
>       0.  # No. of data items
>
>
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