Psi-value 3 Constructions

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Psi-value 3 Constructions

Psi-Values with 3 Components are usefully calculated for constructions where 3 components are connected sequentially. Either the same junction construction is used twice (e.g. 2 identical thermal bridges between a mullion and the glazing) or one  junction between 2 components is "thermal bridge free" (e.g. window with panel instead of glazing).

 

Sample 1:  Using a window with known Uf-Value

, , : Click on the arrows in the graphic below to navigate in tutorial 5.

Sample 2: Using a Uf-value calculation saved in the same or in another file

: Click on the arrows in the graphic below to navigate in tutorial 5.

 

Summary

A Psi-value with 3 components is defined using the Psi-Value tool 3 Components  by applying 4 mouse clicks. The first two points define the surface line, through which the effective heat flow should be calculated. The third and fourth point (reference points) divide the surface into 3 parts with different U-values. The reference points has to be defined counter clockwise. The points are captured if the snap functions  are active (Grid , Guidelines and Objects , cf. menu Arrange).

The type of the Psi-value has to be adjusted in the Properties flyout.The Psi-value type is either twice the same junction construction (this means both has the same Psi-value) or 1 junction with Psi-value and the second junction without Psi-value.

The U-value of the middle component has to be entered in the Properties flyout. You can enter the U-value either directly using the keyboard or using the tool by clicking on the U-value of another file.

You can adjust the other properties of the Psi-value calculation in the Properties flyout.

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