<div dir="ltr"><p class="MsoNormal">Dear TRNSYS users,<span></span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal">I am trying to model a solar water heating system (SWHS) based
on some data that I have, but I am facing two problems related to the temperature
control. <span></span></p>
<p class="MsoNormal">First, I would like the temperature at outlet of the tank (Type
534) to be greater than or equal to the DHW supply temperature measured every
hour (which I read using Type9a from a data file). <span></span></p>
<p class="MsoNormal">Second, I know the supply and return temperatures of the
radiant floor as well as the flow rate. So I created an equation to model the
radiant floor. The equation takes the temperature at HX outlet (Type 534) and
subtract what the radiant floor uses in real life to get the return
temperature, which is linked to inlet temperature for HX (Type 534). I would
like to use a controller so that the return temperature calculated is never
below that measured. <span></span></p>
<p class="MsoNormal">I tried different controllers, but it does not seem to work
out. Does anyone can help me please? <span></span></p>
<p class="MsoNormal">Thank you very much.<span></span></p>
<p class="MsoNormal">Best regards,<span></span></p>
<p class="MsoNormal"><span> </span></p>
<p class="MsoNormal">Charles <span></span></p></div>