تحلیل انرژی و اکسرژی سیستم ترکیبی توربین گازی مجهز به پیل سوختی اکسید جامد

نوع مقاله: پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی واحد رامسر

2 چهار محال و بختیاری دستگرد امامزاده خ آزادی ک سراج

3 دانشگاه تهران

چکیده

هدف از ارائه این مقاله، بررسی انرژی و اکسرژی سیستم ترکیبی توربین گاز مجهز به پیل سوختی اکسیدجامد لوله ای با سوخت هیدروژن است. کلیه اجزای سیستم، جداگانه به کمک روابط ترمودینامیکی مدل سازی شده و برای پیل سوختی به کار گرفته شده یک تحلیل الکتروشیمیایی مجزا انجام شده است. آثار پارامترهای مختلف بر راندمان حرارتی و اکسرژی سیستم و میزان نرخ نابودی اکسرژی کل سیستم و تک تک اجزا سیستم، مورد مطالعه قرار گرفته است. برای صحت کار، نتایج حاضر با نتایج مراجع معتبر مقایسه شده و مطابقت خوبی مشاهده شده است. نتایج شبیه سازی نشان داد که با افزایش دمای ورود به توربین، راندمان حرراتی و اکسرژی سیستم ترکیبی کاهش می- ابد، این در حالی است که توان سیستم افزایش می یابد. همچنین، افزایش دمای ورود به توربین باعث افزایش نرخ نابودی اکسرژی؛ و افزایش نسبت فشار، باعث کاهش نرخ نابودی اکسرژی سیستم می شود. نتایج تحقیق نشان داد که 81 % برگشت ناپذیری سیستم ناشی از پیل سوختی و محفظه احتراق ( 41% برگشت ناپذیری سهم پیل سوختی اکسید جامد، و 40% سهم محفظه احتراق) است. همچنین سیستم ترکیبی دارای راندمان4/58 % می باشد، در حالی که سیستم بدون پیل سوختی دارای راندمان 31 % است که نشان از عملکرد فوق العاده سیستم ترکیبی دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Energy and exergy analysis of gas turbine cycle combined with a solid oxide fuel cell

نویسندگان [English]

  • hamoon pourmirzaagha 1
  • reza ebrahimi 2
  • amir babak ansari 3
3 tehran university
چکیده [English]

This paper present a gas turbine cycle combined with a solid oxide fuel cell with hydrogen fuel’s is exergy and energy modeled. In this way all components of the system are separately modeled. Fuel cell model presented, as well as show its behavior in different condition performance. Then, the effects of various parameters on efficiency, exergy was evaluated. And for accuracy, the results were compared with results of references and shows a good match. Increasing the turbine inlet temperature results in decreasing the thermal and exergy efficiency of hybrid system, whereas it improves the net power output. Moreover, an increase in the turbine inlet temperature leads to increases irreversibility and compression ratio leads to decreases irreversibility of the hybrid system. The results in the design point showed that 81% of irreversibility takes place in the fuel cell and combustion chamber(41% in the SOFC and 40% in combustion chamber). Hybrid system efficiency is 58.4%, while the system without SOFC efficiency is 31%, that is a combination of superior performance system.

کلیدواژه‌ها [English]

  • gas turbine
  • Solid oxide fuel cell
  • Energy
  • Exergy
  • Efficiency
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