When we want to know temperatures within a system, a thermal model, making occurred the decomposition in several isothermal nodes, is generally used. In the field of space thermal control, conductive conductances intervene at coupling level between the different nodes of thermal models.
We have developed a methodology to automatically compute conductive conductances becoming integrated in the thermal chain. The numerical method used to calculate the conductances, is the Boundary Element Method. This method has been tested on a simple example allowing to validate the concept.
We also give the main characteristics of the three-dimensional software which is in the process of development.