Wang,
I will preface this by mentioning that I am not an expert in the
TRNFlow part of Type56.
It is a little hard to know what is going on without knowing
anything about the building. However, if you have multiple zones in
the building, I imagine that there would be some air mixing going on
between zones due to internal temperature and height differences and
the CO2 concentration would decrease in one zone while increasing in
another.
I would also recommend looking at the COMIS documentation (COMIS
is the engine that underlies TRNFlow) to see whether its algorithms
are trying to predict CO2 concentration at a particular point in the
space (like we do in Type56 for comfort calculations at a particular
point in a zone) or whether it is assuming a fully mixed zone as far
as the CO2 level is concerned. If COMIS is calculating concentration
at a point and the air continues to mix after your opening factor
has gone to zero then that might explain the decrease.
Lastly, your mechanical ventilation system might have something to
do with the decrease; If you are actively supplying air to the space
after the opening factor is zero and if the mechanical ventilation
system has some outdoor air associated with it then that also would
explain the decrease in CO2 level.
Regards,
David
On 9/30/2011 08:47, 王洋 wrote:
Dear all,
I simulated CO2 concentration changes using TRNFlow. But
there is a STRANGE phenomenon. There are 2 occupants from 8am to
6 pm, CO2% is controlled by PID controller which controls
Opening Factor (OF) of window at the set-point 1000 ppm. From 6
pm, there are no occupants, OF is 0, there is no infiltration in
TRNBuild (Certainly, infiltration in TRNBuild indeed will
inactivate when couping TRNFlow based on TRNFlow Manual).
However, from 6 pm, CO2% begins to decrease. It's extremely
strange!
Which relative expert can expain that? Or give me some
advices for that? I am puzzled for a long time.
Many thanks in advance!
br
wang
2011/9/30 <trnsys-users-request@cae.wisc.edu>
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Today's Topics:
1. Using Excel as Load Profile (Pei Ru Chao)
2. TRNSYS error 300 (torres.carlos-moises@lte.ireq.ca)
3. Direct expansion solar collector (Mohamad Azly Abd Aziz
(Ir))
4. simulation studio crash when updating project (Antoine
Gautier)
---------- 已转发邮件 ----------
From: Pei Ru Chao <simplica1@hotmail.com>
To: TRNSYS <trnsys-users@cae.wisc.edu>
Date: Fri, 30 Sep 2011 16:31:53 +1000
Subject: [TRNSYS-users] Using Excel as Load Profile
Hi all,
As a newbie I am wondering how to use Excel for load
profile input. Can anyone point me in the right
direction as to how to use a Data Reader to do this? For
example, can the Data Reader read 10920 rows of data? In
9a for example, Parameter 2 asks how many values of
input to read and the maximum is only 98?
Thanks
Pei
---------- 已转发邮件 ----------
From: <torres.carlos-moises@lte.ireq.ca>
To: <trnsys-users@cae.wisc.edu>
Date: Thu, 29 Sep 2011 15:50:36 -0400
Subject: [TRNSYS-users] TRNSYS error 300
Dear all,
Whenever I ry to run
a type 56 simulation in TRNSED I am given the
following error even though the same program runned
perfectly in TRNEdit
*****
ERROR ***** TRNSYS ERROR # 300
UNABLE TO START PROGRAM IN CALLPROGRAM UTILITY
PLEASE CHECK PATH AND PROGRAM NAME, THIS MAY BE A
PROBLEM IN TYPE 66
*** Fatal Error at time : 0.000000
Generated by Unit : Not applicable or not
available
Generated by Type : Not applicable or not
available
TRNSYS Message 300 : The TRNSYS Program
attempted to evaluate an EQUATION that raised a
negative number to a non-integer value. Please check
the EQUATION formulation and re-run the simulation
Reported information : Not available
the
message is not very helpfull and I don't even use
Type 66 in my simulation and I checked all my
equations and nothing obvious comes to view.
Is
there any known solution to this problem? If need be
I can send you the files im using.
Thank
you
Carlos Torres
Stagiaire
universitaire
Laboratoire des
technologies de l'énergie (LTE)
---------- 已转发邮件 ----------
From: "Mohamad Azly Abd Aziz (Ir)" <AZLY@jkr.gov.my>
To: "trnsys-users@cae.wisc.edu"
<trnsys-users@cae.wisc.edu>
Date: Fri, 30 Sep 2011 04:36:25 -0700
Subject: [TRNSYS-users] Direct expansion solar collector
Hi
I wonder whether someone has come-out
with heat pump type with direct expansion solar
collector/evaporator?.
Regards
Azly
---------- 已转发邮件 ----------
From: "Antoine Gautier" <antoine.gautier@solamen.fr>
To: <trnsys-users@cae.wisc.edu>
Date: Fri, 30 Sep 2011 13:48:10 +0200
Subject: [TRNSYS-users] simulation studio crash when updating
project
Dear all
I cannot update my
project any more without crashing simulation studio
(*.tpf and *.b17 in attachment).
Is there another
way to update the input list for Type56 so that I can
keep on working?
Thanks a lot for
your help.
Best regards
--
Antoine Gautier
Solamen
+33 6 98 78 56
46
antoine.gautier@solamen.fr
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
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d.bradley@tess-inc.com
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