AW: Type 19

["hotline" <hotline@xxxxxxxxxxxxxx>]

Hello 
for layers with only 2 mm thickness it is possible to ignore the thermal mass
and model them as a resistance only. 
You can model them with thermal mass but you will have to change the wall timebase
in PREBID and this can cause problems with thick layers.

With kind regards,

your TRNSYS Hotline Team

T.Welfonder, M.Rudolph


Mailto:Hotline@transsolar.com; http://www.transsolar.com
--------------------------------------------------------------------------------------------------------------------
TRNSYS - course 1 :	Introduction into the work with TRNSYS
Basics for dynamic simulations
generating systems with IISiBat (solar system for domestic hot water) 
10. + 11. November 2003
Price:	_ 900,- per person, + VAT
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TRNSYS - course 2 :	Building Simulations with TRNSYS
Input of  building data in PREBID
Modelling of heating, cooling and control systems in IISIBAT
how to do checking of  the results
(for experienced TRNSYS-users, or participants of course 1)
26. +  27. November 2003
Price:	_ 900,- per person, + VAT
--------------------------------------------------------------------------------------------------------------------
TRNSYS - course 4 :	airflow simulation in buildings TRNFLOW
Theory and Basics
introduction into the module TRNFLOW
Integration of TRNFlow in TRNSYS 15
available TRNFlow airflow components 
Outputs of TRNFLOW
Example 
adding the different TRNFLOW components to an  existing multi zone model of a office with double fassade
changes in the TRNSYS input file for TRNFLOW simulations
making different simulation
hints  and checking of the results
(for experienced TRNSYS-users, or participants of course 2)
28. November 2003
Price:	_ 650,- per person, + VAT
--------------------------------------------------------------------------------------------------------------------
Information about TRNFLOW can be found at: http://www.transsolar.com/ts/indexflo.htm.
if you need any further information please contact hotline@transsolar.com.



-----Ursprüngliche Nachricht-----
Von: ahachad mohammed [mailto:ahachad@hotmail.com] 
Gesendet: Donnerstag, 16. Oktober 2003 11:40
An: trnsys@relay.doit.wisc.edu
Betreff: Type 19


Dear colleagues,
I kindly request you to help me. My problem is that I can not calculate the 
transfer function coefficients of a roof constituted by three layers: A0 - 
galvanized iron - E0 (resistance=0.1044 SI).  Having executed the prep 
program I receive always this message: "unable to find a root after 
indication that a root existed"
the proprieties of the galvanised iron are as folowed:
layer thickness = 0.002 (m)
conductivity    = 396 (kJ/hr-m-°C)
density           = 7200 (kg/m**3)
specific heat    = 0.38 (kJ/kg-°C)
I thank you in advance.
Best regards,

M. Ahachad
LEPTAB
Université de La Rochelle
France.

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