How To Optimize The Design Of Passive Doors?

The optimal design of passive gate products cannot be separated from the support of theoretical calculation.

From the perspective of the panel, the "passive door" panel is mostly a metal panel filled with insulation and fireproof materials, and its heat transfer coefficient can be calculated according to the heat transfer theory.

Taking a solid wood core panel + galvanized steel panel as an example, the calculation is as follows:

Steel panel thickness: 0.0015m

Wood thickness: 0.0727m

Thermal conductivity of wood: 0.18

Thermal conductivity of steel: 58.2

Internal surface heat transfer resistance: 0.11

Outer surface heat transfer resistance: 0.04

Total heat transfer resistance: R = 0.554

Heat transfer coefficient: K = 1.805

That is, the heat transfer coefficient of the panel is 1.805, without considering the border and thermal bridge, and the distance from 1.3 is large, which needs to be further optimized.

The keel of "passive door" is mostly shaped structure with cavity, so the finite element method should be used to simulate and optimize it.