----- Original Message -----
Sent: Friday, March 19, 2004 9:57
AM
Subject: AW: star matrix is
singular
Dear Hilde,
this error message can occur when one
of the values specified within Type56 (*.bui) equals zero. This can be
e.g. a area of a wall and is mostly caused during editing the *.bui - within
Prebid the Input of "0" should be prevented by an error message in the user
interface.
regards,
Matthias
Dipl.-Ing. Matthias
Rudolph
TRANSSOLAR Energietechnik GmbH
Konzepte für
energieeffizientes Bauen und Strategies
for energy efficient design and thermal
Nutzerkomfort in Gebäuden
comfort in buildings
phon
++49-711-67976-192 Curiestrasse
2
fax ++49-711-67976-11
70563 Stuttgart
Germany
Mailto:rudolph@xxxxxxxxxxxxxx
http://www.transsolar.com
-----Ursprüngliche
Nachricht-----
Von:
Hilde Breesch [mailto:Hilde.Breesch@xxxxxxxx]
Gesendet: Donnerstag, 18. März 2004 18:27
An: trnsys@xxxxxxxxxxxxxxxxxxx
Betreff: star matrix is
singular
Dear Trnsys users,
I'm trying to perform a sensitivity
analysis with Trnsys15-Comis3.1 on natural night cooling (single sided natural
ventilation) in a small office. Ventilation air by day is mechanically blown
into the office and extracted in the corridor. Using Matlab I can carry out
many simulations at once. The input data change each time for one parameter.
The value of the internal convective heat transfer coefficient depends on the
surface (wall vs floor), the current time (working hour or not) and the
presence of the night ventilation. Night ventilation through louvres in the
façade is (manual) controlled by maximum indoor and outdoor temperature during
the last day.
Only changing the height of the zone
'kantoor' (= office) a little bit from probe123.bui to probe124.bui, and
therefore the areas of the internal walls, causes the next error (see
probe124.lst):
***** ERROR
***** TRNSYS ERROR #
185
UNIT
10 TYPE 56 MULTIZONE BUILDING
STAR MATRIX IS SINGULAR - SIMULATION
STOPPED.
I tried a lot of things to understand
the reason of and find a solution for this problem (e.g. changing values of
convective heat transfer coefficients and), but couldn't find it. Has any one
had the same problem? Or does somebody know the reason? You can find all the
files in attachment.
thanks in advance,
Hilde Breesch
PhD student Buildings & Climatic
Control
Ghent
University, Department of Architecture & Urban Planning Plateaustraat 22,
B-9000 GENT tel. +32 9 264 78 61 fax. +32 9 264 41 85
e-mail: Hilde.Breesch@xxxxxxxx
http://allserv.ugent.be/~hbreesch/research < Datei: Helpdesk.zip >>