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class=445224812-17112010>Hi,</SPAN></SPAN></SPAN>
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class=445224812-17112010>K is relateted to the chosen TIMEBASE and the wall
constructions used in the simulation. How many K are <SPAN
class=166173307-18112010>required </SPAN>is chosen by the algorithm for the wall
calculation so that the <SPAN class=166173307-18112010>method
fits</SPAN>.</SPAN></SPAN></SPAN>
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<DIV dir=ltr align=left><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN class=445224812-17112010>to 1)
that effect can take place. <SPAN class=166173307-18112010>If
h</SPAN>eating is assumed to be ideal<SPAN class=166173307-18112010> and without
limitations</SPAN><SPAN class=166173307-18112010> it can </SPAN>heat up quite
fast. Compared to this if you cool by <SPAN class=166173307-18112010>low
level </SPAN>ventilating through the window this can take much more time<SPAN
class=166173307-18112010> to decrease the
temperature</SPAN>.</SPAN></SPAN></SPAN>
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<DIV dir=ltr align=left><SPAN style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN class=445224812-17112010>to
2) </SPAN></SPAN></SPAN><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN class=445224812-17112010><SPAN
class=166173307-18112010>If you are using the ideal heating then just take QHEAT
as ouput from TRNBUILD.</SPAN></SPAN></SPAN></SPAN>
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style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><SPAN class=445224812-17112010><SPAN
class=166173307-18112010>to 3) if you link your data from type9 directly to a
printer Type 25 then the data should be available in the the output
file </SPAN></SPAN></SPAN></SPAN>
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<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>Von:</B> 王洋 [mailto:wanghongyang1767@gmail.com]
<BR>
<B>Gesendet:</B> Mittwoch, 17. November 2010 19:21<BR>
<B>An:</B>
trnsys-users@cae.wisc.edu<BR>
<B>Betreff:</B> [TRNSYS-users] Questions about
TRANSFERFUNCTION COEFFICIENTS, thermal time constant, NTYPE 207: FLTOZ and type
9<BR>
</FONT><BR>
</DIV>
<DIV></DIV>
<P>
<P>Dear All,<BR>
<BR>
I have some questions to ask you! Many thanks in
advance!
</P>
<P>In .INF file<BR>
To TRANSFERFUNCTION COEFFICIENTS<BR>
K
A
B
C
D <BR>
0
1.7050117E+02 2.1087019E+01
1.7050117E+02 1.0000000E+00<BR>
1 -1.1800059E+02
3.5808933E+01 -1.1800059E+02
-1.3683139E-01<BR>
2
6.0267372E+00 1.6298573E+00
6.0267372E+00 4.7362566E-05<BR>
3 -1.2736107E-03
2.3363784E-04 -1.2736107E-03<BR>
SUM 5.8526043E+01
5.8526043E+01 5.8526043E+01 8.6321597E-01
</P>
<P>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?<BR>
<BR>
Besides that,
I saw K=4 or 2 etc.
</P>
<P><BR>
PLUS:
</P>
<P>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.
<BR>
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?
</P>
<P>I attached the picture of them. Please check it!
</P>
<P>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?
</P>
<P>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.
</P>
<P><BR>
Many thanks!<BR>
<BR>
Br.<BR>
<BR>
wang<BR>
<BR>
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