[esp-r] Re: plant: air cooling coil

[Monika Hall]

Hi Alex and all other,

 

the first view was ok with a negative flux, I changed it in the ctl file. But when I changed it per menu, I got the error message, that the value have to be > 0. 

 

Additionally there must be something wrong, because I can not reach the setpoint temperature. I would like to cool a room with a cooling coil, if the room air temperature is higher then 26°C. The only way to handle the air temperature is due to variation of the cooling flux, but this is dissatisfying.

 

On the other side, the case with heating works fine. The heating coil heats, when the room air temperature is below the setpoint of 20°C.

 

Does anybody know if there is a possibility to set a temperature range for the heating/cooling coil? P.e. the temperature of the heating coil should be between 20 - 40°C and for the cooling coil between 16 - 24°C.

 

Best regards

Monika


  _____  

From: Ferguson, Alex [mailto:AFerguso at NRCan.gc.ca] 
Sent: Wednesday, October 11, 2006 4:38 PM
To: Monika Hall; esp-r at lists.strath.ac.uk
Subject: RE: [esp-r] plant: air cooling coil


Hi Monika,
 
The cooling coil model (CMP04) expects the control signal to be negative (i.e. -2000 for a 2000 W cooling duty.)
 
- Alex 

  _____  

From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Monika Hall
Sent: Wednesday, October 11, 2006 10:32
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] plant: air cooling coil



Dear all,

 

have anybody worked with the plant component " air cooling coil, ref. no 4"? My model works fine with the plant component  " air heating coil, ref. no 5", but when I change the heating coil into a cooling coil the model does not work anymore. 

 

I use the same controller for heating/cooling coil:

controller type a) senses dry bulb  -> actuates flux

Control law b) P,PI,PID for type 0,2,4...

 

I use the same settings for heating/cooling, I only change the setpoints.

 

The error code is:

CMP04C: invalid control data for component 2: 2000

with 2: Cooling coil and 2000: max htg/clg cap [W]

 

Which setting is the right one for a cooling coil? Could somebody help me?

 

Best regards

Monika

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