<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<title>[TRNSYS-users] Biomass boiler, type 700</title>
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p
{mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman";}
span.E-mailStijl18
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:2079858812;
mso-list-template-ids:-746936624;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
-->
</style>
</head>
<body lang=NL link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Sabine,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>My guess would be that
your wall time-base currently equals 1 hour, and that your results will become
more accurate when you use a smaller timebase? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Regards,
Arie <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=1 face=Arial><span
style='font-size:8.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Sabine Jansen -
BK [mailto:S.C.Jansen@tudelft.nl] <br>
<b><span style='font-weight:bold'>Verzonden:</span></b> woensdag 31 maart 2010
15:38<br>
<b><span style='font-weight:bold'>Aan:</span></b> trnsys-users@cae.wisc.edu<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> [TRNSYS-users]
questions heating demand calculation type 56</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div id=idOWAReplyText57145>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dear all,<o:p></o:p></span></font></p>
</div>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I have some general problems with a type 56 simulation, two related to
the calculation of the ideal heating demand and 1 general question.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<ol start=1 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>When calculating the ideal heating edmand, </span></font><font
size=1><span style='font-size:7.0pt'> </span></font><u><font size=2
face=Tahoma><span lang=EN-GB style='font-size:10.0pt;font-family:Tahoma'>it
takes two timesteps for the ideal heating to reach the required
temperature setpoint</span></font></u><font size=2 face=Tahoma><span
lang=EN-GB style='font-size:10.0pt;font-family:Tahoma'>.. <br>
Is this normal or what am I doing wrong?</span></font><o:p></o:p></li>
</ol>
</div>
<div>
<ol start=2 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1'><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma'>When using a schedule in
trnbuild, somehow <u>the heating only switches on at exactly the time of
the switch</u> (in my case 7 h and 17 h), while I assumed the schedule to
mean that at the new time the new temperature must be obtained (see
attached document). The heating switches OFF at exactly the changing time,
so it then takes the new setpoint temperature. (see figure 2).</span></font><o:p></o:p></li>
</ol>
</div>
<div>
<ol start=3 type=1>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1'><font size=2 face=Tahoma><span lang=EN-GB
style='font-size:10.0pt;font-family:Tahoma'>General question: Does
anyone know why the temperature seems to be fluctuating a little (in other
words: it is not a smooth line) as soon as the heating turns off?<br>
Also when using a smaller timestep the line is not smooth, but the
temperatures stay constant during a hour, so the line looks like a
staircase.. <br>
(note: the non-smooth line occurs when the heating is OFF)<br>
(p.s. for some rooms the lines are more smooth than for others. I have
tried different tolerances etc, but didn;t find a soluation)</span></font><o:p></o:p></li>
</ol>
</div>
<p><font size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;
font-family:Tahoma'>All is explained in more detail with figures in the
attached file. Has anyone experienced the same or has an idea what I might be
doing wrong?</span></font><o:p></o:p></p>
<p><font size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;
font-family:Tahoma'>Thank you very much,</span></font><o:p></o:p></p>
<p><font size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;
font-family:Tahoma'>Sabine Jansen<o:p></o:p></span></font></p>
<p><font size=2 face=Tahoma><span lang=EN-GB style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font></p>
</div>
</body>
</html>