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Nguan Teck,<br>
Any timestep that is evenly divisible by one hour should work and
should give approximately the same results. The solution to the problem
depends on which component you are using. If you using a Type9 data
reader then chances are that the interpolation and initial value
settings are not quite matching up with your data. If you are using
Type109 or Type15, there might be a bug in the code.<br>
Kind regards,<br>
David<br>
<br>
<br>
#TEO NGUAN TECK# wrote:
<blockquote
cite="mid:316ED1F87911FC479407CAB86CD984244D515C@MAIL24.student.main.ntu.edu.sg"
type="cite">
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<div id="idOWAReplyText57589" dir="ltr">
<div dir="ltr">I realized that the weather data provided by TRNSYS is
not consistent. </div>
</div>
<div>
<div class="Section1">
<p class="MsoNormal"> </p>
<p class="MsoNormal">The following data is retrieved at 1 hr, 0.5hr
and 0.25 hrs interval (or timestep) at the same time.</p>
<p class="MsoNormal"> </p>
<table class="MsoNormalTable"
style="margin-left: -0.75pt; width: 388.1pt; border-collapse: collapse;"
border="0" cellpadding="0" cellspacing="0" width="517">
<tbody>
<tr style="height: 15pt;">
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal"><b>TIME </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 50pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="67">
<p class="MsoNormal"><b>Temp_A </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal"><b>RH_A </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 49.05pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="65">
<p class="MsoNormal"><b>Temp_B </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal"><b>RH_B </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 49.05pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="65">
<p class="MsoNormal"><b>Temp_C </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal"><b>RH_C </b></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" valign="top" width="64">
<p class="MsoNormal"><b>Interval</b></p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal">HOURS </p>
</td>
<td style="padding: 0in 5.4pt; width: 50pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="67">
<p class="MsoNormal">Deg C </p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal">% </p>
</td>
<td style="padding: 0in 5.4pt; width: 49.05pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="65">
<p class="MsoNormal">Deg C </p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal">% </p>
</td>
<td style="padding: 0in 5.4pt; width: 49.05pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="65">
<p class="MsoNormal">Deg C </p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal">% </p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" valign="top" width="64">
<p class="MsoNormal">hr</p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="padding: 0in 5.4pt; width: 50pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="67">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">5000.00</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">26.70</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">71.71</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">26.30</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">73.43</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">27.05</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">70.26</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" valign="top" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">0.25</span></p>
</td>
<td style="border: medium none ; padding: 0in;" width="3">
<p class="MsoNormal"> </p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="padding: 0in 5.4pt; width: 50pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="67">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">5000.00</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">30.35</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">57.88</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">29.72</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">60.00</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">30.62</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">57.00</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" valign="top" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">0.5</span></p>
</td>
<td style="border: medium none ; padding: 0in;" width="3">
<p class="MsoNormal"> </p>
</td>
</tr>
<tr style="height: 15pt;">
<td style="padding: 0in 5.4pt; width: 50pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="67">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">5000.00</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">30.44</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">57.26</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">29.80</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">59.41</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">30.60</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" nowrap="nowrap" valign="bottom" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">56.73</span></p>
</td>
<td style="padding: 0in 5.4pt; width: 48pt; height: 15pt;"
colspan="2" valign="top" width="64">
<p class="MsoNormal" style="text-align: right;" align="right"><span
style="color: black;">1.0</span></p>
</td>
<td style="border: medium none ; padding: 0in;" width="3">
<p class="MsoNormal"> </p>
</td>
</tr>
<tr height="0">
<td style="border: medium none ;" width="64"><br>
</td>
<td style="border: medium none ;" width="3"><br>
</td>
<td style="border: medium none ;" width="64"><br>
</td>
<td style="border: medium none ;" width="64"><br>
</td>
<td style="border: medium none ;" width="64"><br>
</td>
<td style="border: medium none ;" width="1"><br>
</td>
<td style="border: medium none ;" width="63"><br>
</td>
<td style="border: medium none ;" width="1"><br>
</td>
<td style="border: medium none ;" width="63"><br>
</td>
<td style="border: medium none ;" width="3"><br>
</td>
<td style="border: medium none ;" width="61"><br>
</td>
<td style="border: medium none ;" width="3"><br>
</td>
<td style="border: medium none ;" width="61"><br>
</td>
<td style="border: medium none ;" width="3"><br>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal"> </p>
<p class="MsoNormal">My question is:</p>
<p class="MsoNormal">Which data (i.e. timestep) is more reliable?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Regards.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Nguan Teck</p>
<p class="MsoNormal"> </p>
</div>
</div>
<pre wrap="">
<hr size="4" width="90%">
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
***********************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 22 N. Carroll Street - Suite 370
Partner Madison, WI 53703
USA
P: +1.608.274.2577
F: +1.608.278.1475
E-mail: <a class="moz-txt-link-abbreviated" href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>
Web Pages: <a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a> and <a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a>
***********************************************************************</pre>
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