ABSTRACT

Greenhouse gases associated with energy extraction, production, and consumption are considered a major source of environmental pollution that has led to global warming and climate change. In Saudi Arabia, the building sector represents the largest domain of total energy consumption (roughly 80%) followed by the industrial and agricultural sectors. This study seeks to assess the environmental impacts and economic viability of various construction systems including prefabricated and conventional ones using models for life cycle cost (LCC) and life cycle assessment (LCA). The LCA used in this study was assigned monetary values according to the market price of CO₂ and then combined with the LCC. The developed LCA-LCC therefore provides information regarding the sustainability of the construction method and may assist decision makers in public sector on the selection of the best possible construction system to minimize energy consumption, greenhouse gas emission, and environmental impact while simultaneously reducing overall life cycle costs. The highest LCC was associated with construction costs, which represented 55% to 58% of the whole LCC. The operation and maintenance costs of the project over a 50-year lifespan ranged between 25% and 27% of the overall LCC, while the environmental impact cost was found to represent approximately 17.0% to 18% of the total LCC.

摘要

与能源提取、生产和消费相关的温室气体被认为是导致全球变暖和气候变化的环境污染的主要来源。在沙特阿拉伯，建筑部门是总能源消耗的最大领域（大约 80%），其次是工业和农业部门。本研究旨在评估各种建筑系统的环境影响和经济可行性，包括使用生命周期成本 (LCC) 和生命周期评估 (LCA) 模型的预制和传统系统。本研究中使用的 LCA 根据 CO _{2的市场价格分配货币价值} 然后与LCC合并。因此，开发的 LCA-LCC 提供了有关施工方法可持续性的信息，并可以帮助公共部门的决策者选择最佳施工系统，以最大限度地减少能源消耗、温室气体排放和环境影响，同时缩短整个生命周期费用。最高的 LCC 与建筑成本有关，占整个 LCC 的 55% 至 58%。该项目50年生命周期内的运营和维护成本占整体LCC的25%至27%，而环境影响成本约占总LCC的17.0%至18%。