[TRNSYS-users] Questions about TRANSFERFUNCTION COEFFICIENTS, thermal time constant, NTYPE 207: FLTOZ and type 9

王洋 wanghongyang1767 at gmail.com
Wed Nov 17 10:21:20 PST 2010 

Dear All,

I have some questions to ask you! Many thanks in advance!

In .INF file
To TRANSFERFUNCTION COEFFICIENTS
   K            A              B              C              D
   0       1.7050117E+02    2.1087019E+01    1.7050117E+02    1.0000000E+00
   1      -1.1800059E+02    3.5808933E+01   -1.1800059E+02   -1.3683139E-01
   2       6.0267372E+00    1.6298573E+00    6.0267372E+00    4.7362566E-05
   3      -1.2736107E-03    2.3363784E-04   -1.2736107E-03
  SUM      5.8526043E+01    5.8526043E+01    5.8526043E+01    8.6321597E-01

What's the meaning of A,B,C,D and K? Why K has 0 1 2 3? Is it measuring
times(once  twice etc.) or other  meanings?

Besides that, I saw K=4 or 2 etc.


PLUS:

1) I designed one zone temperature control system using PID controller with
DCV control strategy to control the window opening factor(OP): the set-point
temperatre is 21°C when occupied, 19°C when unoccupied. But to my surprise,
it needs only about 2 hours to reach 21°C from 19°C, BUT it needs 13 hours
to reach 19°C from 21°C. It will have much more heating consumption in
actual situation.
Please explain it in detail! I think like this why the thermal time constant
will change? What's relationship between the thermal time constant with 2
HOURS and 13 HOURS?

I attached the picture of them. Please check it!

2) I used NTYPE 207: FLTOZ to calculate the total outdoor air flow into zone
when the window opening factor changes, Is it right? If so, which type can i
use to calculate the Q of heating consumption?
(dQ=dm*C*(Tindoor-Toutdoor)-->lntegral dQ?) Or how to calculate the sum of
dm of indoor air flow into outside and  the sum of(Tindoor-Toutdoor) one
day?

3) To type 9: I used my own weather data every one hour. But Why the
original data cann't be shown in .out file and NO .plt file after running?
Because I want to use the original data.


Many thanks!

Br.

wang

2010/11/17 <trnsys-users-request at cae.wisc.edu>

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> Today's Topics:
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>   1. IVF 11.1 - TRNDLL debugging (CHEZE David 227480)
>   2.  Radiation; tilted surface (Sancho,Fernando)
>   3. Re: Type41 (David BRADLEY)
>
>
> ---------- 已转发邮件 ----------
> From: "CHEZE David 227480" <david.cheze at cea.fr>
> To: <trnsys-users at engr.wisc.edu>
> Date: Wed, 17 Nov 2010 17:14:02 +0100
> Subject: [TRNSYS-users] IVF 11.1 - TRNDLL debugging
>
> Hi,
>
>
>
> I’ve upgraded from CVF6 to IVF11.1, downloaded the IVF10.1 example project
> from TRNSYS’s website and try to debug a user component running in legacy
> mode (TRNSYS 16.01.0003, link to TRNDLL). TRNSYS dll is well copiled since
> simulations run as usual. I checked that in the project debug option manager
> the path to TRNExe.exe is correct: when I run the debug, I got a warning
> message “ debugging information for ‘TRNExe.exe’ cannot be found or does not
> match. Binary was not build with debugging information” and debugging
> failed. Can you give me any tips&tricks about how to debug under IVF11.1 ?
>
>
>
> Thanks,
>
>
>
>
>
> David
>
>
>
>
> ---------- 已转发邮件 ----------
> From: "Sancho,Fernando" <fernando.sancho at sonnenwaermeag.de>
> To: <trnsys-users at engr.wisc.edu>
> Date: Wed, 17 Nov 2010 17:47:24 +0100
> Subject: [TRNSYS-users] Radiation; tilted surface
> Hello,
> I´m having some problems with the radiation data. Using the same source
> and,  theoretically, the same estimation models there are big differences in
> the results for a tilted surface between TRNSYS and the other software  we
> normally use, specially in winter.
> I´m using Type 16, reduced estimation from Reindl to calculate diffuse and
> beam components and Hay and Davies model  for tilted surface, supposed to be
> what the other software use.
> But basically I find  a very little change between the two different sloped
> surfaces , 0º and 45º. We are supposed to get much more in percent in Winter
> when we have a sloped surface, don´t we?
> This are the results. Latitude 52º
>
>                      TOTAL                           kWh/m2 months
> Horizontal       1011.     18.8     32.1     67.3     112.7   152.3   150.4
>   160.9   135.0   86.9     56.6     24.1    14.2
> 45ºSurface     1050.     22.0     38.5     79.0     122.1   146.2   135.4
> 149.7   138.5   100.2   72.1     29.8     6.7
>
> Any advice about it? where am I wrong?
>
> Thanks a lot
>
>
>
>
>
> ---------- 已转发邮件 ----------
> From: David BRADLEY <d.bradley at tess-inc.com>
> To: leduc.marie-andree at lte.ireq.ca
> Date: Wed, 17 Nov 2010 11:55:07 -0600
> Subject: Re: [TRNSYS-users] Type41
> Marie-Andree,
>   If you were not yet able to resolve the problem, could you please send me
> your *.tpf and I'll have a look at it?
> Best,
>  David
>
>
> On 11/12/2010 12:53, leduc.marie-andree at lte.ireq.ca wrote:
>
> Hi, I want to use Type41 to produce an annual occupation profile.  My
> Type41 is linked to two Type14s, one of which is a week profile (Weekday
> input), the other is a weekend profile (Weekend input).  I thought this was
> pretty straightforward but the output of Type 41 is only the Weekday
> profile.  What could be the problem?
>
>
> Marie-Andrée
>
>
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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
> F:+1.608.278.1475d.bradley at tess-inc.com
> http://www.tess-inc.comhttp://www.trnsys.com
>
>
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