Re: [TRNSYS-users] HELP-

[David BRADLEY <d.bradley@tess-inc.com>]

Susana,

 TRNSYS has boolean functions that you can use. The function LT(x,y) will return a 1 if x < y and a 0 otherwise. Typically you can use those functions to construct more complex functions. For instance you could do:

result = A*LT(v,8) + B*GE(v,8)

kind regards,

 David

On 01/03/2022 06:24, SUSANA LAGE CAL via TRNSYS-users wrote:

Hello, everybody

 

Happy New Year!

 

I am in the middle of the process of introducing external h convection parameter in my building simulation.

 

Nevertheless, formulas are not always the same: They vary with wind velocity. And I do not know how to introduce such conditionial  condition in a Trnsys Equation.

 

If wind velocity limit was 8 m/s, the formula would be A for v< 8 m/s and B for v>8 m/s: If we were to work with Excel, solution could be easily found by writing: =IF (v_CELL<8;A;B). But, how can I possibly such replicate by means of an Equation?

 

Hope any of you can help me

 

Best regards

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David BRADLEY
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