[TRNSYS-users] (no subject)

Jeff Thornton thornton at tess-inc.com
Thu Nov 20 10:13:53 PST 2014


 

Haydar Kepekci, 

It shows a remarkable lack of class, and a remarkable lack of
intelligence, to F-bomb a mailing list when links that describe how to
unsubscribe from the list are provided on every e-mail that goes
out..... 

---
Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton at tess-inc.com

On 11/20/2014 11:57 am, mcdowell at tess-inc.com wrote: 

> Haydar Kepekci - 
> 
> Please use the links at the bottom of the email to unsubscribe from the TRNSYS mailing list. 
> 
> And please avoid using offensive language in email messages. 
> 
> 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 2014-11-20 09:23, haydar kepekçi wrote: 
> 
> Dont send me e- mail !! I dont want to see ur words about Fucking trnsys !!! 
> 
> Sent using CloudMagic [2] 
> 
> On Per, Kas 20, 2014 at 4:32 PM, Ben Heymer <bheymer at gmail.com> wrote: 
> 
> You should look through your "Result" file for the source of the error. 
> 
> A common cause of errors of this type is convergence. Make sure you 
> have enough volume in your water loop for at least 1 timestep of water 
> flow. Sometimes it's also helpful to connect the mass flow output of 
> the pump right back to the mass flow input. 
> 
> As a last resort, you can relax the convergence parameters and error 
> thresholds in the control cards. 
> 
> Ben Heymer, PE 
> 
> On Thu, Nov 20, 2014 at 3:52 AM, Michael Stochniol 
> <stochnio at mail.hs-ulm.de> wrote: 
>> Hallo everyone, 
>> 
>> im trying to create a control function using equations with logic operators for the control of a variable speed pump, in order to adjust the massflow trough the pump. I wrote a control funktion and plotted it without connecting it to the pump and it seemed to work right. But if i am conecting it to the pump my simulation freezes after around 700 timesteps or less. I am trying to create solar domestic hot water system. The question is, is it possible to create this kind of control circuit with equations ? I have similar problems with every control loop i am trying to create this way. The math should work but implemented in TRNSYS (TRNSYS 17) the simulation stick somewhere. 
>> 
>> I am no experienced user so maybe someone could give my some advise how to implement this kind of control functions right? 
>> 
>> i am very grateful for any help or ideas. 
>> 
>> thanks in advance 
>> 
>> Michael Stochniol 
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