Re: [TRNSYS-users] trnsys

[knut.erik.enerstvedt@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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