The estimation of thermal modeling at the design stage by iteration. For equipment functional-hub concept design acceptable phased ideology of modeling of thermal modes of constructions RES, adequate block hierarchy design and with the downward direction in which structural system that can be applied this method of modeling is divided into the following isothermal elements: elements of BOC, cooling systems, etc. on the same structural level (body shell), modules underlying level (discrete body). This should be known external heat - temperature environments or external surfaces of adjacent modules of this and the above levels that consider the design is in heat transfer, the value of which is determined on the previous stages of thermal calculation. Underestimation of the method iteration on stage thermal design leads to necessity of the decision of errors at the stage of manufacturing technological methods.

hierarchy RES, phase thermal modeling, iteration, aggregation, decomposition, assessment of the accuracy of modeling.