[TRNSYS-users] Issue in auxiliary operations with Type941 (Heat Pump from TESS)

[David BRADLEY]

Thank you for pointing this out Antoine. We will certainly get it fixed.

kind regards,

  David


On 10/28/2019 04:59, LECONTE Antoine 219492 via TRNSYS-users wrote:
>
> I have noticed a potential issue with the use of the auxiliary system 
> of the Heat Pump Type 941 (from TESS library).
>
> In the source code (Type941.for), there is no value setting for QAUX 
> when all signals à “OFF”.
>
> This means that an auxiliary consumption can be computed whereas its 
> operation mode is “OFF”.
>
> For instance : in one time step you have “Heating mode “ and “Aux 
> mode” both “ON”; if in the next timestep all signals are “OFF”, Type 
> 941 will still set QAUX > 0 as an output.
>
> This can be easily fixed by either adding an additional condition on 
> the calculation of QAUX directly in the TRNSYS model or by 
> re-compiling type 941 with an additional “QAUX=0.” In the “NO-FLOW 
> CONDITIONS”.
>
> Best regards,
>
> ------------------------------------------------------------------------------------------
>
> Description : cid:image001.png at 01CF110C.81BE0EF0
>
> 	
>
> *Antoine LECONTE***
>
> *Research Engineer*
>
> /National Institute of Solar Energy /
>
> *CEA/LITEN - Department of Solar Energy***
>
> *Building and Thermal Systems*
>
> Description : cid:image002.jpg at 01CF110C.81BE0EF0**
>
> Commissariat à l’énergie atomique et aux énergies alternatives
>
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>
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>
> antoine.leconte at cea.fr <mailto:antoine.leconte at cea.fr>; 
> www.ines-solaire.org <http://www.ines-solaire.org/>; liten.cea.fr
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

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

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