Re: [TRNSYS-users] Problem with Dry Fluid Cooler (type 511)

Hello,

Thank you for your answer Timothy,

I try to change the design ambient air temperature to 26.67, but it isn’t run (all other design parameters have their default value). Maybe I forget something, but I don’t know what.

Regards,

Maxence BUREAU
Ingénieur de Recherche
Qualité d'Air Intérieur
______________________________________________________________________

Cofely

Centre de recherche Cylergie
L'Orée d'Ecully - Bât. C - Chemin de la Forestière
69130 - ECULLY
tel. +33472860934 - fax +33478433959
Mob. +33637613217
mailto:maxence.bureau@cofely-gdfsuez.com
www.cofely-gdfsuez.fr

Before printing, think about the environment / Avant d'imprimer, pensez à l'environnement

De : trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] De la part de mcdowell@tess-inc.com
Envoyé : jeudi 11 avril 2013 21:36
À : TRNSYS users mailing list at the Solar Energy Lab, UW-Madison
Objet : Re: [TRNSYS-users] Problem with Dry Fluid Cooler (type 511)

Maxence -

You are correct, there is a problem with the default values in the Type511 Proforma. If you change the Design Ambient Air Temperature to 26.67 C it should run.

Regards,

Tim

---

Timothy P. McDowell

Executive Vice President

Thermal Energy System Specialists, LLC

22 N Carroll St, Suite 370

Madison, WI 53703

608-274-2577

On 2013-04-10 03:20, maxence.bureau@cofely-gdfsuez.com wrote:

Hello,

I would like to use a type 511 (HVAC Library (TESS) – Dry Fluid Cooler), but it doesn't work.

When the value of input 2 (fluid flow rate) is higher than 0, the simulation doesn’t work and an error message appear (“TRNSYS errors : one error was found in the deck…”).

I have this error message in "list file" :
"*** Fatal Error at time   :         0.125000
    Generated by Unit     :    10
    Generated by Type     :   511
    Message               : The dry cooler model was unable to correctly calculate the number of transfer units (NTU) for the design condition. Please check the design conditions carefully."

I tested the type with the defaults design conditions, but it was the same error message. I think there is a problem with input 2.

Please find attached my “.tpf” file.
Thank you for your help.

Sincerely,

Maxence BUREAU
Ingénieur de Recherche
______________________________________________________________________

Centre de recherche Cylergie
L'Orée d'Ecully - Bât. C - Chemin de la Forestière
69130 - ECULLY
tel. +33472860980 - fax +33478433959
mailto:maxence.bureau@cofely-gdfsuez.com
www.cofely-gdfsuez.fr
Before printing, think about the environment / Avant d'imprimer, pensez à l'environnement

Before printing, think about the environment / Avant d'imprimer, pensez a l'environnement