[TRNSYS-users] (no subject)

[mcdowell at tess-inc.com]

Haydar Kepekci - 

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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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