[TRNSYS-users] Type 510 cooling tower -Fan control signal error

Thu Apr 30 15:45:07 PDT 2015

David,

Thank you for your response.I have checked the parameters as suggested.The design outlet fluid temperature was not below the design wet bulb temperature. Although,when I reduce the design wet bulb temperature,I didn't get any error message.

However,the outlet water temperature is higher than the design outlet fluid temperature. How can I achieve a lower outlet water temperature,probably similar to the design outlet fluid temperature or lower?

Regards,

Idris

________________________________
From: David BRADLEY <d.bradley at tess-inc.com>
Sent: 30 April 2015 15:35
To: TRNSYS users mailing list at OneBuilding.org; Shofolahan, Idris Adewale
Subject: Re: [TRNSYS-users] Type 510 cooling tower -Fan control signal error

Idris,
  The error message doesn't have to do with the fan control signal. The error is that the model cannot determine the energy transfer coefficients for the tower given the parameters that you have entered. For example, if you give a design outlet fluid temperature that is below the design wet bulb temperature then it is physically impossible for a tower to deliver such an outlet water temperature and the model will generate the error that you received. The fan control signal appears involved because the energy transfer coefficients are only calculated if the tower is actually on and running.
regards,
 David

On 4/30/2015 12:20 AM, Shofolahan, Idris Adewale wrote:

Dear all,

I'm currently working on a project using a chiller and type 510 cooling tower. The project is given error when the fan control signal is set at 1 at the input tab. What do you think is the cause of this error? Schematics and error message of the project attached.Thank you.

Regards,
Idris

________________________________________
From: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org><mailto:trnsys-users-bounces at lists.onebuilding.org> on behalf of trnsys-users-request at lists.onebuilding.org<mailto:trnsys-users-request at lists.onebuilding.org> <trnsys-users-request at lists.onebuilding.org><mailto:trnsys-users-request at lists.onebuilding.org>
Sent: 29 April 2015 21:08
To: trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>
Subject: TRNSYS-users Digest, Vol 124, Issue 42

Send TRNSYS-users mailing list submissions to
        trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>

To subscribe or unsubscribe via the World Wide Web, visit
        http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

or, via email, send a message with subject or body 'help' to
        trnsys-users-request at lists.onebuilding.org<mailto:trnsys-users-request at lists.onebuilding.org>

You can reach the person managing the list at
        trnsys-users-owner at lists.onebuilding.org<mailto:trnsys-users-owner at lists.onebuilding.org>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of TRNSYS-users digest..."
Copyright in this email and in any attachments belongs to London South Bank University. This email, and its attachments if any, may be confidential or legally privileged and is intended to be seen only by the person to whom it is addressed. If you are not the intended recipient, please note the following: (1) You should take immediate action to notify the sender and delete the original email and all copies from your computer systems; (2) You should not read copy or use the contents of the email nor disclose it or its existence to anyone else. The views expressed herein are those of the author(s) and should not be taken as those of London South Bank University, unless this is specifically stated. London South Bank University is a company limited by guarantee registered in England and Wales. The following details apply to London South Bank University: Company number - 00986761; Registered office and trading address - 103 Borough Road London SE1 0AA; VAT number - 778 1116 17 Email addr
ess - LSBUinfo at lsbu.ac.uk<mailto:LSBUinfo at lsbu.ac.uk>
============================================
The LSBU communications disclaimer can be found at http://www.lsbu.ac.uk/ict/legal/

_______________________________________________
TRNSYS-users mailing list
TRNSYS-users at lists.onebuilding.org<mailto:TRNSYS-users at lists.onebuilding.org>
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org

--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

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

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

Copyright in this email and in any attachments belongs to London South Bank University. This email, and its attachments if any, may be confidential or legally privileged and is intended to be seen only by the person to whom it is addressed. If you are not the intended recipient, please note the following: (1) You should take immediate action to notify the sender and delete the original email and all copies from your computer systems; (2) You should not read copy or use the contents of the email nor disclose it or its existence to anyone else. The views expressed herein are those of the author(s) and should not be taken as those of London South Bank University, unless this is specifically stated. London South Bank University is a company limited by guarantee registered in England and Wales. The following details apply to London South Bank University: Company number - 00986761; Registered office and trading address - 103 Borough Road London SE1 0AA; VAT number - 778 1116 17 Email address - LSBUinfo at lsbu.ac.uk
============================================
The LSBU communications disclaimer can be found at http://www.lsbu.ac.uk/ict/legal/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20150430/d3cf5801/attachment-0003.htm>