[TRNSYS-users] Type 4

Matt Duffy duffy at tess-inc.com
Wed Jul 11 12:54:15 PDT 2012


 

Dear Baboo, 

The author of the Type4*.tmf proforma simply created
it that way: you will have to specify the total number of nodes on the
Parameter and Derivatives tabs and specify two less than the total
number of nodes on the output tab. That is not necessarily intuitive,
but it was simply created that way and remained for backwards
compatibility. If you are looking for a more intuitive tank model, I
highly recommend the Type534 tank from the TESS Storage Tank Library.


Thus, if you would like two nodes in your Type4 tank (or two volumes
for the calculations), you would have to indicate "2" on the Parameter
and Derivatives tabs and "0" on the Outputs tab. 

Best regards, 

Matt
Duffy 

---

Matthew J. Duffy
Project Engineer, TRNSYS Coordinator

Thermal Energy System Specialists, LLC 
 22 N. Carroll St, Suite 370 

Madison, WI 53703 
duffy at tess-inc.com [1]
www.tess-inc.com
[2]
www.trnsys.com [3]
TRNSYS on Facebook [4] 

On 2012-07-11 09:47,
Baboo Gowreesunker wrote: 

> Hi 
> 
> The number of nodes in Type 4
corresponds to the number of derivatives (NEQ in the FORTRAN code) in
the Type. There are two nodes for the bottom and top nodes of the
tank.
> 
> I'm confused as to why we can put different number of output
nodes and derivative nodes in the Type. Also, what is the function of
the top and bottom nodes, are these the inlet/outlet nodes? 
> 
> For
e.g., if I want 2 nodes in my tank, do I set the derivative number to 2
or 4, and what about the number of outputs ?
> 
> Thanks
> Baboo
>
_______________________________________________
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list
> TRNSYS-users at cae.wisc.edu
>
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Links:
------
[1]
mailto:duffy at tess-inc.com
[2] http://www.tess-inc.com/
[3]
http://www.trnsys.com/
[4] http://www.facebook.com/TRNSYS
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