تحلیل اگزرژی الحاق آب شیرین کن حرارتی MED-TVC به نیروگاه سیکل ترکیبی نکاء و تاثیر آن بر راندمان حرارتی و توان کل نیروگاه

نوع مقاله: پژوهشی

نویسندگان

دانشگاه تربیت دبیر شهید رجایی

چکیده

ﺗﻮﻟﯿﺪ آب ﺷﯿﺮﯾﻦ ﻫﻤﺰﻣﺎن ﺑﺎ اﻓﺰاﯾﺶ ﺟﻤﻌﯿﺖ ﻣﻨﺎﻃﻖ ﻣﺨﺘﻠﻒ، ﻫﻤﻮاره ﯾﮑﯽ از ﻣﺴﺎﺋﻞ ﻣﻬﻢ جوامع امروزی است، اﺳﺘﻔﺎده از ﺗﮑﻨﻮﻟﻮژی ﺷﯿﺮﯾﻦ ﺳﺎزی آب ﻣﯽ ﺗﻮاﻧﺪ ﯾﮑﯽ از ﻣﻮﺛﺮﺗﺮﯾﻦ و ﻣﻔﯿﺪﺗﺮﯾﻦ روﺷﻬﺎی اﺳﺘﻔﺎده از ﺣﺮارت ﺑﺎزﯾﺎﻓﺘﯽ واﺣﺪﻫﺎی ﻧﯿﺮوﮔﺎﻫﯽ ﺑﺎﺷﺪ. اﯾﺮان ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ کمبود منابع آب ﺷﯿﺮﯾﻦ از سویی و وﺟﻮد ﻧﯿﺮوﮔﺎﻫﻬﺎی حرارتی ﻣﺘﻌﺪد در ﻣﻨﺎﻃﻖ ﺳﺎﺣﻠﯽ شمال و جنوب از سوی دیگر، ﭘﺘﺎﻧﺴﯿﻞ ﺑﺎﻻﯾﯽ را ﺟﻬﺖ اﺳﺘﻔﺎده از اﯾﻦ ﺗﮑﻨﻮﻟﻮژی فراهم نموده است. در این بررسی با توجه به طرح انتقال آب دریای خزر به فلات مرکزی ایران و لزوم شیرین‌سازی آب قبل از فرآیند انتقال، به بررسی امکان الحاق آب-شیرین‌کن حرارتی با سیکل بخار نیروگاه شهید سلیمی نکاء و همچنین بررسی میزان انهدام اگزرژی در اجزای مختلف سیکل و تاثیرالحاق آب‌شیرین‌کن برراندمان کلی نیروگاه پرداخته شده است. نتایج به دست آمده نشان می‌دهد بیشترین میزان انهدام اگزرژی در ترموکمپرسور و پس از آن در کندانسور اتفاق می‌افتد. همچنین به کمک دبی استحصالی از توربین فشار پایین نیروگاه، روزانه حداکثر 7215مترمکعب آب شیرین قابل تولید است اما این برداشت باعث کاهش 76/6% توان کل نیروگاه و 9/0 % راندمان حرارتی نیروگاه می‌گردد.

کلیدواژه‌ها


عنوان مقاله [English]

Exergy analysis of coupling MED-TVC to Neka combined cycle power plant

نویسندگان [English]

  • karim maghsoudi mehrabani
  • majid aliasghari
  • abdollah mehrpanahi
چکیده [English]

Freshwater generation is always one of the most important issues in human communities coincided with population increase in different areas, using water desalination technology can be one of the most effective and useful method in utilizing power plants heat recovery. Iran has a high potential to use this technology due to the shortage of fresh water resources on the one hand and several thermal power plants in the coastal areas of North and South on the other hand. In this study, exergy destruction rate in different components of the cycle and also the rate of profit and loss resulting from coupling desalination to Neka power plant were studied according to the project of Caspian Sea water transfer to the central plateau of Iran and the necessity of water desalination before transferring. Results showed that the maximum exergy destruction cost occurred in the thermo-compressor and then in condenser. also if the flow of low pressure turbine used in MED-TVC can product7215m3/day freshwater but this decrease in LP turbine flow, decreased 6.67% of the total power and 0.9 % thermal efficiency of a power plant.

کلیدواژه‌ها [English]

  • MED
  • Exergy destruction
  • Thermo-compressor
  • combined cycle powerplant
  • LP turbine
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