Thermally optimal insulation distribution for underground structures

摘要

This paper provides and analytical soultion of the optimal distribution of thermal insulation along the surfaces of underground structures to minimize the annual heat transfer through the groud-coupled surfaces. The analytical solution is obtained using the Interzone Temperature Profile Estimation (ITPE) technique. Two underground structures are considered in this paper: a fully earth-sheltered structure and a partially bermed structure with a shaft that opens to an above-grade interior space. The results of a parametric analysis are summarized to determine the amount of heat flux imposed on each surface on the optimum insulation distribution along the underground surfaces.