[TRNSYS-users] Type 665

[Francois Badinier]

Hi Arnaud

 

1. Yes, you have to connect your heat pump to the ventilation of type 56
(airchange + temperature + RH)

 

2. It is a good way to control your heat pump with Type2, however, I'm not
quite sure if the way you entered the inputs is good. I'd recommend you
connect the room temperature to your upper input temperature, enter 14 C in
the lower input temperature, then enter the dead band you wish in upper dead
band temp (e.g. 8 if you want the HP to stop working when the room temp is
22C) and put the lower dead band temp to 0. (also, make sure you also
connect the output of type 2 to the "input control function" to make sure
the hysteresis works well). Then, you have to take the opposite of the
output signal to make it work properly, so just open a new equation and use
the function NOT: Heating_signal=NOT(old_heating_signal). Finally, connect
this new signal to the control signal of your HP.

 

3. When you get a lot of oscillations like that, it means that your HP is a
bit oversized or that your deadband is too small, try to play with both if
you want to get rid of some oscillations.

 

I hope this helps.

 

Regards,

 

François Badinier

Development Engineer

ICAX Ltd

1 Hatfield House 

Baltic Street West

London EC1Y OST

 <mailto:alan.kiff at icax.co.uk> francois.badinier at icax.co.uk

 <http://www.icax.co.uk> www.icax.co.uk

 

 

-----Original Message-----
From: A.Thome-08 at student.lboro.ac.uk [mailto:A.Thome-08 at student.lboro.ac.uk]

Sent: 27 July 2009 11:22
To: trnsys-users at cae.wisc.edu
Subject: [TRNSYS-users] Type 665

 

 

 

Good morning everyone,

 

I connected Type 665 ( air/air heat pump) to the ventilation of type56.

However, I don't manage to control properly the Heat pump.

 

At the moment, the heat pump is control by a type 2 component. But it seems
that there is a problem of information transmission between the heat pump
and the controller.

 

Enclosed, a file where it can be seen the controller setting and the heat
pump working.

 

Is it the best solution to connect the heat pump to the ventilation? Should
I use the gains instead?

 

Best regards,

 

Arnaud.

 

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