[TRNSYS-users] Calculation of a gradient in Trnsys for control of heat pump

[David BRADLEY]

Toni,

  Type83 will compute the derivative of an input that you give it. Send 
your storage temperature to Type83 and watch the derivative; if it gets 
too small then you can increase the compressor speed. There is also a 
PID controller (Type23) whose gain constants you can tune to get your 
compressor to respond to the changing tank temperature.

kind regards,

  David


On 11/29/2022 08:55, Toni Calabrese via TRNSYS-users wrote:
>
> Dear Trnsys users,
>
> within a project we need to control the compressor speed of a heat 
> pump for the heating of a thermal storage. The basic idea would be to 
> adapt the compressor speed (from 0 to 100%) based on a gradient 
> temperature (Tt2 – Tt1) in the storage. If the temperature of the 
> storage is increasing too slowly, compressor speed needs to be 
> increased and if the temperature is increasing too fast, compressor 
> speed needs to be decreased. Which is the easiest way to implement 
> this in Trnsys? Which Types could we use?
>
> Thanks a lot and have a nice evening
>
> ------------------------------------------------------------------------
>
> *Toni Calabrese*, MSc.
>
> Wissenschaftlicher Projektleiter
>
> toni.calabrese at spf.ch <mailto:toni.calabrese at spf.ch> 
> |toni.calabrese at ost.ch <mailto:toni.calabrese at ost.ch>
>
> T +41 58 257 4827
>
> SPF Institut für Solartechnik
>
> OST – Ostschweizer Fachhochschule
>
> Oberseestr. 10 | CH-8640 Rapperswil | Switzerland | www.spf.ch 
> <http://www.spf.ch/>| www.ost.ch <http://www.ost.ch/>
>
> ------------------------------------------------------------------------
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com
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