[TRNSYS-users] trnsys

[knut.erik.enerstvedt at niva.no]

Dear Michel  PAUL,

If you are in a hurry, it is also possible to achieve this by using a 
combination of Type 2 controllers, Type 93 input value recall and an 
equation to integrate elapsed time the heat pump has been on or off, and 
then generate the control signal in another equation combining minimum 
time on or off with the need for heating. I can describe this in more 
detail if you are interested.

Best regards,
Knut Erik Enerstvedt
 

>Michel,
>  The heat pump model does not contain any controls; the heating and 
>cooling control signals are inputs to the model so you are able to 
>impose whatever controls you want. We have written a number of 
>controllers that have the features that you describe; they will be 
>available in the next version of the TESS Libraries (TESSLibs 17). Some 
>of them may be ready for advance purchase if you are interested.
>Best,
> David


michel te wrote:
> Hello,
> I would like to have an information about the use of water to water 
> heat pump type 668 from tess and all trnsys and tess heat pumps 
generally.
> How can I set a minimum time value of run and a minimum time value of 
> stand-off to prevent short cycle.
> Best regards
> Michel  PAUL


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