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<DIV><SPAN class=130490211-16062006><FONT face=Arial color=#0000ff
size=2>Poppong,</FONT></SPAN></DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN class=130490211-16062006><FONT
face=Arial color=#0000ff> </FONT></SPAN></FONT></FONT></DIV>
<DIV><FONT face=Tahoma><FONT size=2><SPAN
class=130490211-16062006> </SPAN>-----Ursprüngliche
Nachricht-----<BR><B>Von:</B> trnsys-users-bounces@engr.wisc.edu
[mailto:trnsys-users-bounces@engr.wisc.edu] <B>Im Auftrag von </B>Sakulpipatsin,
P.<BR><B>Gesendet:</B> Mittwoch, 14. Juni 2006 15:09<BR><B>An:</B>
trnsys-users@engr.wisc.edu<BR><B>Betreff:</B> [TRNSYS-users] Inquiry for energy
balance for Zones (NTYPE 904)<BR><BR></FONT></FONT><FONT face="Courier New"
size=2><SPAN style="FONT-SIZE: 10pt">Dear
Sir/Madam,<o:p></o:p></SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=Section1>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt">I would like to ask you some questions about energy
balance for Zones (NTYPE 904). The energy balance equation is in “the Type 56
user’ manual” I enclosed the balance information to this
mail.<o:p></o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P><![if !supportLists]>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face="Courier New"><SPAN style="FONT-SIZE: 10pt"><SPAN
style="mso-list: Ignore">1.<FONT face="Times New Roman" size=2><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]>I used the example of TRNSYS16,
Restaurant, and looked at energy balance for a zone in the example. All hourly
energy balances (BAL_ENERGY), generated by TRNSYS16, are not zero. However the
attached manual says that the values should be always 0. I also did energy
balance for a single zone model (using TYPE 56) and the results were also not
zero. Could you please give me a reason why they are not zero? In a result
file of NTYPE 904, there is a column of “REL_BAL_ENERGY” What is the
“REL_BAL_ENERGY”?<SPAN class=130490211-16062006><FONT face=Arial
color=#0000ff> </FONT></SPAN></P>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff></FONT></SPAN> </P>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff></FONT></SPAN> </P></DIV></BLOCKQUOTE>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial color=#0000ff>The REL_BAL_ENERGY is
the relative error of the energy balance, in other words, the error in the
energy balance referred to the sum of energy entering a zone (or any
balance room). For the restaurant example and even for the building example
this relative error is far below 1 %.</FONT> </SPAN></DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN
class=130490211-16062006></SPAN></FONT></FONT> </DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial color=#0000ff>The absolute "error" in
the energy balance should be 0. Actually TRNSYS TYPE 56 has
a certain tolerance on the energy balance caused by the convention that matrix
inversion is not performed in each iteration call when the difference
of the values are small refered to the previous call.</FONT></SPAN></DIV><PRE class=MsoPlainText dir=ltr style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN class=130490211-16062006></SPAN> </PRE>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=Section1>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff></FONT></SPAN><o:p><FONT face=Arial
color=#0000ff></FONT></o:p> </P><![if !supportLists]>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face="Courier New"><SPAN style="FONT-SIZE: 10pt"><SPAN
style="mso-list: Ignore">2.<FONT face="Times New Roman" size=2><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]>In the energy balance equation,
what is the QWGAIN? When I did energy balance for those examples (in item 1),
all values of the QWGAIN are zero. Could you please explain why all the
results are zero?<SPAN class=130490211-16062006><FONT face=Arial
color=#0000ff> </FONT></SPAN></P>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff></FONT></SPAN> </P></DIV></BLOCKQUOTE>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN class=130490211-16062006>With WALLGAIN you
can define an energy flux to the inside surface of a wall (in kJ/h). If in
the balance the values are 0, no wall gain has been defined in the
building description. </SPAN></FONT></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=Section1>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006> </SPAN><o:p></o:p></P><![if !supportLists]>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face="Courier New"><SPAN style="FONT-SIZE: 10pt"><SPAN
style="mso-list: Ignore">3.<FONT face="Times New Roman" size=2><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]>In the energy balance equation,
what is the QTRANS? Does the value equal to summation of difference between
QT_RGain_i and QCOMI for all surfaces covering the zone? The definitions of
QT_RGain_i and QCOMI are in item 4.2.9.6 in the attached file. I thought in
this way because only QT_RGain_i and QCOMI of NTYPE 906 (intem 4.2.9.6 in the
manual) come from the inner surface nodes. And only QTRANS from the energy
balance equation interacts the inner surface nodes (when QWGAIN is zero).<SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff> </FONT></SPAN></P>
<P class=MsoPlainText
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><SPAN
class=130490211-16062006><FONT face=Arial
color=#0000ff></FONT></SPAN> </P></DIV></BLOCKQUOTE>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN class=130490211-16062006>QTRANS is the
energy passing the inner wall surfaces, independently from what is
happening in the wall. </SPAN></FONT></FONT></DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN class=130490211-16062006>Actually it is the
difference QCOMI (NTYPE19) - QABSI (NTYPE 21) summed for all
surfaces. </SPAN></FONT></FONT></DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN
class=130490211-16062006></SPAN></FONT></FONT> </DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial><FONT color=#0000ff><SPAN
class=130490211-16062006></SPAN></FONT></FONT> </DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT><SPAN
class=130490211-16062006></SPAN><o:p><SPAN class=130490211-16062006><FONT
face=Arial color=#0000ff>Kind regards</FONT></SPAN></o:p></FONT></DIV>
<DIV class=MsoPlainText dir=ltr
style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1"><FONT
face=Arial color=#0000ff><o:p><SPAN
class=130490211-16062006>Monika</SPAN></o:p></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=Section1>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt">Could you please answer my questions? Thank you very
much.<o:p></o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt">Best regards,<o:p></o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">Poppong Sakulpipatsin,
MSc.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">Doctoral researcher, Building Services
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">Faculty of Architecture, <st1:place
w:st="on"><st1:PlaceName w:st="on">Delft</st1:PlaceName> <st1:PlaceType
w:st="on">University</st1:PlaceType></st1:place> of Technology
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">Berlageweg 1, 2628 CR <st1:City
w:st="on">Delft</st1:City>, The <st1:country-region w:st="on"><st1:place
w:st="on">Netherlands</st1:place></st1:country-region>
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt">Tel.
+31-15-278-5955<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">Fax +31-15-278-4178
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt">e-mail P.Sakulpipatsin@bk.tudelft.nl
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=3><SPAN style="FONT-SIZE: 12pt"><A
href="http://bk.tudelft.nl/bt/installaties"><FONT color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: windowtext; TEXT-DECORATION: none">http://bk.tudelft.nl/bt/installaties</SPAN></FONT></A></SPAN><o:p></o:p></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoPlainText><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>