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<p>Bishan,</p>
<p>Instead of using 21 in your last equation, use Tsetpoint where the setpoint is an input to the equation from a forcing function which is 21 during the day and 18 at night.</p>
<p> </p>
<p>Jeff</p>
<p> </p>
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<pre>---<br />Jeff Thornton
President - TESS LLC
3 N. Pinckney Street, Suite 202, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
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<p>On 10/18/2018 11:46 am, Bishan Thapa via TRNSYS-users wrote:</p>
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<div>Hello everyone,</div>
<div> </div>
<div>I was looking to calculate hours under set point which counts the unmet hours excluding the night set back. I need to do that for first three months and last two months of year as those are only the heating periods for me.</div>
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<div>I have developed preliminary equation in equation tab. </div>
<div>2160 =end of march</div>
<div>7296 = beginning of november</div>
<div>K1 = LE(time,2160)</div>
<div>K2 = GE(time,7296)</div>
<div>HUSP = K1*LT(temp,21) +K2*LT(temp,21)</div>
<div> </div>
<div>But this calculation includes the night set back temperature as well which is 18 C. How to avoid including the night set back temperature in the calculation ?</div>
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<div>Thank you</div>
<div> </div>
<div>Bishan Thapa</div>
<div>UNCC</div>
<div> </div>
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