[TRNSYS-users] type 557a

Tue Jul 21 09:50:25 PDT 2009

Dear all, 

We just produced a small project in order to show the effect. Pay attention to the plots. and the period of the appearance of the losses.

Thanks to all 

max

Date: Mon, 20 Jul 2009 12:39:06 -0500
From: bradley at tess-inc.com
To: maxwithhat at hotmail.com
CC: duffy at tess-inc.com
Subject: Re: [TRNSYS-users] type 557a

Max,

 Could you send us the project that you are working from so that we can
take a look at it?

Thanks 

David

Max Werlein wrote:

  Dear Matt,

The  problem ist not tracing the inputs, outputs and parameters. We
have been trying to debug the component 

and have encountered the problem explained before: 

" While simulating with the type 557a (Ground Heat Exchanger (TESS)) I

discouverd that the heat losses of the earth control volume to the

sides, top and bottom (Outputs: 5,6,7) are generating a peak in a

constant period (roughly 27 hours) while the rest of the time these

outputs are zero. What I actually want is an output of the losses in

every timestep. Does anyone have an idea what is actually calculated by

these outputs? Is there an error in the code?"

The problem is that the type is quite commplicated and hence we are not
able to completely understand the code!

But the results we get seem to be wrong if ever our interpretation of
the results in the online plotter are correct! 

The losses to all sides (top, bottom and side) are 0 for nearly all the
time, only for 1 timestep (after a period off roughly 27 hours) it get
a value. We have tried to understand the timestep handeling in the
code, which (if we understood well!!) seems to convert the unit hours
of the main soubroutine into seconds for the other soubroutines used,
and we suspect that there might be a mistake somewhere in the treatment
of the losses with the different time units! But as mentioned we are
not sure and we are no experts either !

Maybe some of you colleages may have an idea, 

Sorry for bothering !

Thanks 

max 

> Date: Wed, 15 Jul 2009 20:45:34 -0500

> Subject: Re: [TRNSYS-users] type 557a

> From: duffy at tess-inc.com

> To: maxwithhat at hotmail.com; trnsys-users at engr.wisc.edu

> 

> Max,

> 

> To watch outputs (and inputs and parameters) for a component, you
can use

> the TRACE feature. Simply click on the component, and then click
on the

> footprints icon on the left side of the TRNSYS Simulation Studio.
Run the

> simulation. This will print the inputs, outputs, and parameters of
that

> specific component to the listing file, *.lst. However, I am not
too

> familiar with Type557

> 

> Best regards,

> 

> Matt Duffy

> 

> 

> 

> ----- Original Message -----

> From: "Max Werlein" <maxwithhat at hotmail.com>

> Sent: Tue, July 14, 2009 12:08

> Subject:[TRNSYS-users] type 557a

> 

> 

> Dear Trnsys users,

> 

> 

> 

> While simulating with the type 557a (Ground Heat Exchanger (TESS))
I

> discouverd that the heat losses of the earth control volume to the

> sides, top and bottom (Outputs: 5,6,7) are generating a peak in a

> constant period (roughly 27 hours) while the rest of the time these

> outputs are zero. What I actually want is an output of the losses
in

> every timestep. Does anyone have an idea what is actually
calculated by

> these outputs? Is there an error in the code?

> 

> 

> 

> Thanks in advance

> 

> 

> 

> Max

> _________________________________________________________________

> Enamórate este invierno con MSN Amor y Amistad

>
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> TRNSYS-users mailing list

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> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users

> 

> 

> ----- End of original message -----

> 

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