Energy Consumption and Equivalent Carbon Emissions in the Life Cycle of Conventional Housing External Walls, an Approach to Sustainable Energy DevelopmentCase Study: Regions in Sanandaj

Energy sustainability is realized within the framework of sustainable development. Considering the major share of energy consumption of residential buildings in Iran, this study aimed to identify and compare the external walls of Sanandaj housing as the most effective energy consumption factor in the life cycle of the building, and was sought to assess the embodied Energy and environmental pollutants in the production period as well as the operational cycle. Considering the analytical-descriptive approach, after describing the related principles, Delphi method and analytical hierarchy of Fuzzy AHP were used to identify and zonate the frequency of common external walls in three areas of Sanandaj. Then, the energy consumption of the embodid period was assessed with the existing data and using modeling and simulation of a city block in Design Builder software the energy of the operational cycle was assesed considering the relevant variables. Interpretation of the findings was conducted using SPSS, ANOVA and Duncan's test for comparing the classifications and indicated a significant relationship between the embodied energy levels of production and operational cycle between the walls and its extent in the three regions of Sanandaj city. The very low contribution of primary energy of the embodied period compared to the operational cycle for three metropolitan areas was 2.01, 1.87 and 1.86, respectively, of life cycle of the building. The results of the research in regions of Sanandaj indicated the unfavorable condition of energy consumption in the widespread use of the walls during the life cycle stages of the building.