Optimization of life cycle costs of external wall insulation for the climatic conditions of Bukhara and Jizzakh

The study optimized the thickness of thermal insulation in the external walls of buildings for the climatic conditions of Bukhara and Jizzakh regions using a Python software model and life cycle cost analysis (LCCA). Calculations were performed for expanded polystyrene (EPS) and basalt wool materials. The results showed that the optimal insulation thickness ranged from 47 to 79 mm, depending on the wall type and climate. EPS material in concrete walls yielded the most effective results: energy savings of 87–88%, with a 2-year payback period. SPP in brick walls was 3 years, and in vermiculite concrete - 7 years. Fuel prices and the cost of insulation material were identified as the main influencing factors, and their changes directly affected the optimal thickness. When comparing the model results with the EES program, only a 2.3% difference was observed. Overall, EPS material with a thickness of 70–80 mm was found to be the most economical and energy-efficient solution for the continental climatic conditions of Uzbekistan.

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