Comprehensive average calculation method for optimization design of heat conductivity coefficient of graphite thermal insulation material

The invention provides a comprehensive average calculation method for optimization design of a heat conductivity coefficient of a graphite thermal insulation material. The method comprises the following steps: firstly, determining the volume ratio and basic size of each material in a graphene composite thermal insulation board; then, respectively establishing parallel-series and series-parallel heat conduction calculation models, and calculating thermal resistance of subunits in the two models and thermal resistance of matrix materials and inclusion materials in the subunits; then respectively establishing series and parallel models of a matrix material and an inclusion material in the subunits, and calculating equivalent heat conductivity coefficients of the subunits in the two models; then calculating equivalent heat conductivity coefficients of materials in the two models according to the parallel connection relationship between the subunits of the parallel-series model and the series connection relationsh