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<p>Ashmin,</p>
<p> The controller can make one control decision per time step. When
the controller decides to turn on the cooling equipment then the
cooling equipment has to stay on for 5 minutes, driving the
temperature of the space downwards, perhaps beyond the limit of
the dead band. If you use a 1 minute timestep instead then the
controller has a chance every minute to turn the cooling equipment
back off, limiting the temperature overshoot in the building.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 05/25/2021 08:01, asmin aryal wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAAynMJw8wTe=QBRkDbrOC4AUqcmVsPMa22KwZwO8ZbzvPFS7SQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Dear Sir,
<div>I am cooling type 56 building with type type 752 (Simple
Cooling Coil Using Bypass Fraction Approach; Temperature
Controlled) by introducing the cool air via ventilation to
type 56.</div>
<div> I am controlling the room air temperature by type 2:
aquastatC controller. When i run the simulation with 5 min
time step, the controller cannot control the room air
temperature within the dead band but when i run the simulation
with 1 min time step it can control the room temperature
within the dead band.</div>
<div>What may be the possible reason. </div>
<div>Looking forward to your answer.</div>
<div><img src="cid:part1.3CA4BDB2.D70F220F@tess-inc.com"
alt="image.png" style="margin-right: 0px;" class=""
width="470" height="380"><br>
</div>
<div><br>
</div>
<div><img src="cid:part2.2DB2F84E.E1D859A0@tess-inc.com"
alt="image.png" style="margin-right: 0px;" class=""
width="470" height="239"><br>
</div>
<div>Sincerely </div>
<div>Ashmin Aryal </div>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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