Abstract :
The critical ambient heat load of an orbicular cover sheltering electronics devices was numerically studied with a view to identifying the effects of several parameters, including solar radiant intensity, latitude, geometrical and thermo-physical properties of the orbicular cover, and thermal parameters of the ambient. The results of various working conditions showed that the above mentioned parameters all had effects on the critical ambient heat load. To identify and quantify the effects of these parameters, the results were mathematically processed, and then a correlation of critical ambient heat load was obtained. With this correlation, the critical ambient heat load of electronics devices in any orbicular cover could be calculated quickly regarding to various working conditions.
