| Summary: | 碩士 === 大葉大學 === 環境工程研究所 === 90 === This study investigates the environmental impact of coal-fired, gas-fired and nuclear power systems from a life-cycle point of view, aiming to reduce the relevant environmental dispute often occurred during the decision-making process of the energy policy. Based upon a simplified life cycle assessment methodology, the inventories of environmental pollution associated with the aforementioned three power systems were outlined. Furthermore, the Analytic Hierarchy Process (AHP) and the damage factors itemized in the commercially available Eco-indicator 99 were integrated, in order to quantify the environmental impact of the three different power systems. The weighting factors of various impacts, namely on the environment, on the human health and on the resource depletion, were decided by questionnaire conducted among experts. In addition to the classical AHP method, a Fuzzy Analytic Hierarchy Process (F-AHP) was also adopted to assess the fuzzy aspect commonly observed in similar studies.
The study result indicates that the weighting factors of the relevant impacts decided by the classical AHP and the F-AHP do not have significant difference, possibly due to the similar professional background of the participating experts. In terms of the overall environmental impact of the three power systems, coal-fired units result in the most significant impact, whereas the gas-fired units result in the least significant impact. It should also be noted that coal-fired units result in the most significant impact in regional scale (i.e. in Taiwan area), whereas the gas-fired units result in the least significant impact in regional scale since some quite majority part of the relevant impacts in the so-called “LNG chain” occurs genuinely more significantly in global scale (i.e. outside Taiwan).
Key words: Life Cycle Assessment (LCA), Analytic Hierarchy Process (AHP), Environmental Impact, Energy Policy
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