[TRNSYS-users] Type 701 error

Thu Jul 31 13:28:18 PDT 2008

Hi Lucas,
I suspect that your error has to do with the number of nodes set up in Type 701. The number of parameters depends on the total number of nodes you have. At the end of the list of parameters you need to specify the total nodes in x, y, and z-direction; make sure these are correct. The nodes in each direction are the nodes along the boundary wall plus the nodes on both sides of the boundary.
Hope it helps!
Regards,
Ratnalee Patil
Graduate student,
Concordia University,
Montreal, Canada
----- Original Message -----
From: "Lucas Witmer" <ltw110 at psu.edu>
Sent: Wed, July 30, 2008 14:05
Subject:[TRNSYS-users] Type 701 Parameter requirements

Hi,

I am trying to model a basement in conjunction with a building model
(type 56).  First, do I need to make a "basement" zone in my type 56
before I can use a type 701 or is the type 701 in place of a
"basement" zone?

second, I set it up and tried to run it but got a fatal error.  I only
see 33 parameters listed in the type.  Why is it expecting 59
parameters, and what should I do?  below is the fatal error:

*** Fatal Error at time  :        0.000000
    Generated by Unit    :    20
    Generated by Type    :  701
    TRNSYS Message    103 : The TRNSYS TYPE checking routine has found
an inconsistency in the specified component between the input file and
the information expected by the Type
    Reported information  : An illegal number of PARAMETERS has been
specified for this component. Please check the component
configuration. 59 PARAMETERS are required and 33 were specified.

Thanks!
Lucas Witmer

----- Original Message ----
From: "trnsys-users-request at engr.wisc.edu" <trnsys-users-request at engr.wisc.edu>
To: trnsys-users at engr.wisc.edu
Sent: Thursday, July 31, 2008 12:26:54 PM
Subject: TRNSYS-users Digest, Vol 43, Issue 34

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Today's Topics:

  1. (no subject) (Sine Girm)
  2. brief description (Sine Girm)
  3. bug: "stability criteria not fullfilled" (Catherine Massart)
  4. error creating a wall type Trnsbuild (Amandine Le Denn)
  5. Re: Type 701 Parameter requirements (Matt Duffy)
  6. FW:  TYPE 50 and SOLCEL data file (Ali Al-Alili)
  7. Re: error creating a wall type Trnsbuild (Cramer Silkworth)
Dear transys users
Currently I am working on simulating a parabolic trough power plant.
On trough component model, There is term on a model which  I couldn't
understand  turn down ratio, night flow ratio, Ramp down time Ramp
down ratio. Please give me the brief description and the values that
should be inserted on the input of Transys regarding SEGS 6 Power
plant.

-----Inline Message Follows-----

Some of the walls I created bring a bug.

« Error creating the wall transfer function coefficients :
Stability criteria not fullfilled
Check layer definition (thickness, ratio of conductivity/density)
Please check the INF-file for further information »

I heard this could be solved by changing the density and capacity of the layer that causes the problem (here, a ceiling wood structure insulated with 40cm of wood fiber pannels (Steico))
But I cannot do this because I want to evaluate the impact of the inertia on the inside temperatures.
I tried by deviding the material in 2 layers: one would have the same inertia and the other, massless, would bring the thermical resistance. It doesn't work, stability criteria is still not fullfilled...

Can someone help me?

Thanks a lot

Catherine Massart
UCL-Belgium

I want to make simulations on highly insulated buildings.
Some of the walls I created bring a bug.

« Error creating the wall transfer function coefficients :
Stability criteria not fullfilled
Check layer definition (thickness, ratio of conductivity/density)
Please check the INF-file for further information »

I heard this could be solved by changing the density and capacity of the layer that causes the problem (here, a ceiling wood structure insulated with 40cm of wood fiber pannels (Steico))
But I cannot do this because I want to evaluate the impact of the inertia on the inside temperatures.
I tried by deviding the material in 2 layers: one would have the same inertia and the other, massless, would bring the thermical resistance. It doesn't work, stability criteria is still not fullfilled...

Can someone help me?

Thanks a lot

Catherine Massart
UCL-Belgium

-----Inline Message Follows-----

Dear TNRSYS users,

I created  walls in my TRNBuild simulation and an error message appears when registering:"Error creating the wall transfert function coefficients: Unable to find a root after indication that a root exists. Maybe the timebase is too small. Please, check the INF-file further information."
I do not see where is the problem. Thank you for your help.

Best regards,

HAMADI Malik- Amandine LE DENN 

Dear TNRSYS users,

I created  walls in my TRNBuild simulation and an error message appears when registering:"Error creating the wall transfert function coefficients: Unable to find a root after indication that a root exists. Maybe the timebase is too small. Please, check the INF-file further information."
I do not see where is the problem. Thank you for your help.

Best regards,

HAMADI Malik- Amandine LE DENN 
 Dear TRNSYS-user,

    In the SOLCEL data file, the short current for low concentration and
temperature is higher than the one for high concentration and low
temperature. Isn't suppose to be the other way around, since the current
increases with radiation? The value for the low and high concentration at
high temperature is also the same !(Ref: 8.4.4.14)
    I edited the proforma to allow the concentration ratio to be grater
than 1. I also edited the SOLCELL file and increased the number of cells.
Here are the results

C = 25                        
Num    Tout    Tcell    V    I    Q[kWth]    P[kWe]
10    40    52    4.9    19    0.54        0.093
50    40    52    24.5    3.8    0.54        0.093
100    40    52    49    1.9    0.54        0.093

The voltage is increasing as you would expect, but why is the current
decreasing? It seems like the current is adjusted to keep the power output
the same.What I'm trying to do is to fix the size of the collector to
provide 2kwe and 2 kwth.

Regards,
Ali    

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-----Inline Message Follows-----

Amandine,

Check the thicknesses of your wall layers, layers that are too thin are generally the cause of this error. If you've got any really thin layers, consider using a massless layer and just define a resistance for it, as its mass is probably negligible (which is why the transfer functions freak out).

-Cramer
J. Cramer Silkworth
Transsolar Climate Engineering
Technical consulting for energy efficiency and environmental quality.
145 Hudson Street
Suite 402
New York, NY 10013
Office: 212-219-2255
Mobile: 347-283-2547
silkworth at transsolar.com

________________________________
From: Amandine Le Denn [mailto:amandine.le-denn at tecsol.fr] 
Sent: Thursday, July 31, 2008 9:58 AM
To: trnsys-users at engr.wisc.edu
Subject: [TRNSYS-users] error creating a wall type Trnsbuild

Dear TNRSYS users,

I created  walls in my TRNBuild simulation and an error message appears when registering:"Error creating the wall transfert function coefficients: Unable to find a root after indication that a root exists. Maybe the timebase is too small. Please, check the INF-file further information."
I do not see where is the problem. Thank you for your help.

Best regards,

HAMADI Malik- Amandine LE DENN

Amandine,

Check the thicknesses of your wall layers, layers that are too thin are generally the cause of this error. If you've got any really thin layers, consider using a massless layer and just define a resistance for it, as its mass is probably negligible (which is why the transfer functions freak out).

-Cramer
J. Cramer Silkworth
Transsolar Climate Engineering
Technical consulting for energy efficiency and environmental quality.
145 Hudson Street
Suite 402
New York, NY 10013
Office: 212-219-2255
Mobile: 347-283-2547
silkworth at transsolar.com

________________________________
From: Amandine Le Denn [mailto:amandine.le-denn at tecsol.fr] 
Sent: Thursday, July 31, 2008 9:58 AM
To: trnsys-users at engr.wisc.edu
Subject: [TRNSYS-users] error creating a wall type Trnsbuild

Dear TNRSYS users,

I created  walls in my TRNBuild simulation and an error message appears when registering:"Error creating the wall transfert function coefficients: Unable to find a root after indication that a root exists. Maybe the timebase is too small. Please, check the INF-file further information."
I do not see where is the problem. Thank you for your help.

Best regards,

HAMADI Malik- Amandine LE DENN
 _______________________________________________
TRNSYS-users mailing list
TRNSYS-users at engr.wisc.edu
https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

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