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<p>Sherif,</p>
<p> Using a differential controller will work but Trnsys18 also has
some just-plain-thermostat models (Type106 or Type166) that might
be easier to implement. You'll need two connections. One
connection might come from an equation or a combination of an
equation and a forcing function that results in the temperature
that you want the boiler to supply. The equation might be:</p>
isSummer = AND(GT(TIME,3624),LT(TIME,6552))<br>
isWinter = 1-isSummer<br>
boilerSetPoint = 85.*isSummer + 40.*isWinter
<p>The other connection will be the temperature that is being
monitored to decide whether the boiler should be on or off. Again
you'll probably need some equations here so that the decision to
turn on the boiler can come in summer when conditions are such
that you want to run the chiller or in winter when you want heat.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<p> <br>
</p>
<div class="moz-cite-prefix">On 07/08/2021 17:14, SHERIF SAIED via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJSajLbGnnpm_DxjC=iO8fHfLZ1ao+mGGbu3GQ9o1NiSHbm=eA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">checked Thanks, I have another question I used a
differential controller to the boiler type 700 and need
temperature out of it in the range between 80-90 in
summer(cooling season) to supply absorption chiller and need
temperature in winter(heating season) in the range of 30-45. I
linked the upper input Temp.(Th) to outlet of the boiler, linked
the lower input Temp.(TL) to the return flow from the tank to
the boiler. for monitoring Temp. (Tin),upper dead band(dt) and
lower dead band(dt) I don't really know how to link or what
value should be. could anyone help, please?, Thanks in advance.</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Jul 6, 2021 at 8:32 PM
David BRADLEY <<a href="mailto:d.bradley@tess-inc.com"
moz-do-not-send="true">d.bradley@tess-inc.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Sherif,</p>
<p> There are a number of examples in the
.\Trnsys18\Examples\HVACTemplates\ folder that will give
you some ideas about how to implement control of HVAC
systems. Have a look at the 10-Examples.pdf documentation
in parallel with those examples. I don't think that any of
them have a radiant floor in them but the principals are
the same. <br>
</p>
<p>You might also have a look at the example:<br>
</p>
<p>.\Trnsys18\Examples\Feedback Control\SunSpace - Floor
heating PID controller.tpf</p>
<p>Its controls are possibly more complicated than the ones
in your case but it will show how to do the system-level
connections between Type56's active layers and the HVAC
system.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<p><br>
</p>
<div>On 07/06/2021 10:20, SHERIF SAIED via TRNSYS-users
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello everyone,
<div><br>
</div>
<div>I need help in some controls on radiant cooling and
heating system model like type 165 to control either
boiler for heating system or control building
temperatures, also need to control on different
components for the cooling system to work uniformly
according to season if summer cooling system work and
if winter will work the heating system and so on . I
have problems in PPD and PMV for building through all
year. if anyone would help or have an example model
for how I can set these controllers in two systems?</div>
<div>Regards, <br>
-- <br>
<div dir="ltr">
<div dir="ltr">
<div>
<div dir="ltr"><b>Sherif Saied.</b>
<div><b>Tel: (</b>+2)01004419468 /
(+2)01124348957</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
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</blockquote>
<pre 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 href="mailto:d.bradley@tess-inc.com" target="_blank" moz-do-not-send="true">d.bradley@tess-inc.com</a>
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<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr"><b>Sherif Saied.</b>
<div><b>Tel: (</b>+2)01004419468 / (+2)01124348957</div>
<div><br>
</div>
</div>
</div>
</div>
</div>
<br>
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</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>
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