The Optimizing Combination about Material and Insulation Thickness of External Walls Based on Life Cycle Cost Analysis

This paper gives the calculating method on the optimizing combination about material and insulation thickness of external walls based on Life Cycle Cost Analysis. It is divided into two steps: first, computing the optimum insulation thickness and relevant LCC of all materials; second, comparing all of the LCC, if the Kth in the material life-cycle cost is minimum, so the combination of material and thickness was the solution. We give the detailed steps and models about the optimizing insulation thickness of the external wall. Through this method, construction project can achieve the goal of economy and energy saving.