[TRNSYS-users] Calculating Hours Under set point//Unmet hours

[Jeff Thornton]

Bishan, 

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. 

Jeff 

---
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 at tess-inc.com

On 10/18/2018 11:46 am, Bishan Thapa via TRNSYS-users wrote: 

> Hello everyone, 
> 
> 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. 
> 
> I have developed preliminary equation in equation tab. 
> 2160 =end of march 
> 7296 = beginning of november 
> K1 = LE(time,2160) 
> K2 = GE(time,7296) 
> HUSP = K1*LT(temp,21) +K2*LT(temp,21) 
> 
> 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 ? 
> 
> Thank you 
> 
> Bishan Thapa 
> UNCC 
> 
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