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

[mcdowell@tess-inc.com]

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

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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
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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

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