ارزيابي و رتبه بندي روش هاي نمك زدايي به منظور انتخاب مناسب ترين سيستم آب شيرين كن با استفاده از مدل تصميم گيري چند معياره فازي (مطالعه موردي : جزاير جنوبي ايران )

Evaluation and Ranking desalination methods in order to select the most appropriate desalination system by using fuzzy multi-criteria decision making models (case study : south Islands of Iran)

در اين طرح تحقيقاتي ، مدلي براي ارزيابي و رتبه بندي روش هاي نمك زدايي شامل اسمزمعكوس (RO) ، الكترودياليز(ED)، تقطير چندمرحله اي(MED)، تقطير ناگهاني چندمرحله اي(MSF) و تراكم بخار(VC) ، به منظوراحداث سيستم هاي آب شيرين كن در جزاير جنوبي ايران با استفاده از روش هاي تصميم گيري چند معياره فازي پيشنهاد مي گردد.اين مدل بر پايه چهار معياراصلي اقتصادي، فني، زيست محيطي و اجتماعي و دوازده زير معيار، كه با مشورت خبرگان و از مطالعات پيشين استخراج و شناسايي شده اند، ارائه گرديده است .براي تعيين اهميت نسبي و اوزان معيارها و زيرمعيارها از روش فرآيند تحليل شبكه اي(ANP) و نرم افزار Super Decisions استفاده گرديده است.در اين تحقيق ، به دليل اينكه برخي ابعاد مسئله مورد ارزيابي داراي ابهام بودند و اندازه گيري آنها با شاخص هاي كمي امكان پذير نبود، درفرآيندارزيابي آنها از اعداد فازي (مثلثي) استفاده شده و به منظوررتبه بندي آنها ، روش تاپسيس فازي (F-TOPSIS) به كاربرده شده است. درنهايت رتبه بندي روش ها بصورت RO ED MSF MED VC بدست آمده است و روش اسمزمعكوس (RO) به عنوان مناسب ترين روش نمك زدايي به منظور احداث و راه اندازي سيستم هاي آب شيرين كن در جزاير جنوبي ايران انتخاب گرديده است.

In this paper, a model for the evaluation and ranking of desalination methods is presented to build water desalination plants in southern Islands of Iran using fuzzy (under uncertainty) multi-criteria decision-making methods. This model is presented based on four main criteria and twelve sub-criteria, in a conceptual framework. The main criteria for evaluation include four of the economic, technical, environmental and social criteria while the evaluation sub-criteria include: investment costs, energy costs, operation/ exploitation, maintenance costs, reliability and expandability of any of the desalination methods, the amount of desalinated water quality, capacity of desalinated water supply and production, dependence of each of the approaches to industrial services abroad, amount of saline waste disposal, air pollution levels, rate of consumers health and the employment rate of each of the methods, previous studies mentioned criteria and sub-criteria have been identified and extracted from previous studies methods of ANP and Super Decisions software was used to determine the relative importance and their weighting. Because some aspects of the under assessment problem were ambiguous and their measure it not possible with quantitative indicators, the fuzzy numbers had been used in their evaluation process. Then Fuzzy TOPSIS method was used to complete their ranking process. Finally, the methods ranking was obtained in RO ED MSF MED VC form and the reverse osmosis (RO) method was selected as the best and most appropriate desalination method to build and launch water desalination plants in southern Islands of Iran.