<div dir="ltr"><p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">Dear
Trnsys users</span><span style="font-size:12pt;font-family:'Times New Roman',serif"></span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">I facing problem while
using controller Type 2b between solar water heater and storage tank. i have
spent several hours in understanding its behavior but still i am
confused. </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">Issue is i have
connected the <b><u>"upper Input
temperature"</u></b> as collector outlet and <b><u>"lower Input temperature"</u></b> as outlet from storage
tank heat exchanger.</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">I have set the <b>deltaT<sub>H</sub>=10</b> and <b>delta T<sub>L</sub>= 2</b> as i want that
controller switch keep the pump on between this two limits.</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">But when u exported the
TRNSyS data to excel to check the result it is noticed that sometimes pump is
off even the above mentioned limit (deltaT<sub>H</sub>=10 and delta T<sub>L</sub>=
2) is satisfied. I am attaching the excel file and issue is highlighted in this
file (sheet 1). Also TRNSYS file is attached</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif"> </span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">I will be thanks for
the help and the suggestion and to know where I am wrong.</span></p>
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<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">Reagrds</span></p>
<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify"><span style="font-size:12pt;font-family:'Times New Roman',serif">Adeel</span></p>
<p class="MsoNormal"> </p></div>