مطالعه تجربی احتراق مخلوط آمونیاک-متان در محفظه احتراق میکروتوربین گازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده هوافضا، دانشگاه امیرکبیر، تهران، ایران

2 دانشکده مهندسی هوافضا، دانشگاه صنعتی امیرکبیر

3 گروه پیشرانش، دانشکده هوافضا، دانشگاه امیرکبیر، تهران، ایران

چکیده

برای رسیدن به هدف انتشار کربن صفر، جایگزین کردن سوخت‌های هیدروکربنی معمول با سوخت‌های بدون کربن، از اهمیت بالایی برخوردار است. از نظر سوخت بدون کربن، آمونیاک در کنار مشکلاتی چون سرعت شعله پایین و انتشار آلایندگی NOx بالا، مزایای متعددی نسبت به هیدروژن دارد.

از این رو، مطالعه تجربی حاضر به بررسی اثر افزودن آمونیاک به متان و نسبت آن بر روی عملکرد احتراقی یک محفظه احتراق میکروتوربینی از نوع قوطی در شرایط اتمسفریک در دو توان حرارتی مختلف می‌پردازد. نتایج نشان می‌دهد که با افزایش درصد آمونیاک در سوخت، بیشینه دمای شعله کاهش پیدا کرده و احتراق تا ناحیه‌ی انتهایی محفظه به تاخیر افتاده است. همچنین، افزودن آمونیاک، علی‌رغم عدم کاهش CO، افزایش شدید مقدار NOx تولیدی محفظه را به همراه دارد. بعلاوه، اگرچه دمای خروجی محفظه بجز یک حالت، تغییر چندانی نداشته ولی بازده احتراقی محفظه با افزایش نسبت آمونیاک، افت کرده و متغیر یکپارچگی در صورت استفاده از آمونیاک، بیشتر از حالت 100% گاز طبیعی است. بنابراین، اگرچه استفاده از مخلوط سوخت آمونیاک/ متان با شرایط احتراق پایدار در محفظه‌ی موجود، ممکن است ولی برای رسیدن به عملکرد مطلوب احتراقی، اصلاحات جدی نیاز دارد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental study of Ammonia-Methane mixture combustion in the micro gas turbine combustor

نویسندگان [English]

  • Milad Bastani 1
  • Sadegh Tabejamaat 2
  • Hossein Ashini 3
1 Aerospace department, Amirkabir university, Tehran, Iran
2 Department of Aerospace Engineering, Amirkabir University of Technology
3 Aerospace department, Amirkabir university, Tehran, Iran
چکیده [English]

To achieve the zero carbon emissions goal, it is of great importance to replace conventional hydrocarbon fuels with carbon-free fuels. In terms of carbon-free fuel, ammonia has several advantages over hydrogen, despite of problems such as low flame speed and high NOx emission. The present experimental study investigates the effect of adding ammonia to methane and its ratio on the combustion performance of a can-type micro-turbine combustion chamber under atmospheric condition at two different heat powers. The results show that with an increase in the percentage of ammonia in the fuel mixture, maximum flame temperature has decreased and combustion has delayed until the end of chamber. Also, the addition of ammonia, despite not reducing CO, results in a sharp increase in the NOx production. In addition, although the outlet temperature of the chamber has not changed much except for one condition, combustion efficiency of the chamber has decreased with the increase of ammonia ratio, and pattern factor is more than the case of pure natural gas. Therefore, although the use of methane/ammonia fuel mixture with stable combustion conditions in the existing chamber is possible, it requires modifications to achieve optimal combustion performance.a
 
.

کلیدواژه‌ها [English]

  • Microturbine combustion chamber
  • Ammonia
  • Methane
  • Mixing percentage
  • Performance parameter

مراجع

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  • تاریخ دریافت: 10 اسفند 1401
  • تاریخ بازنگری: 20 فروردین 1402
  • تاریخ پذیرش: 05 اردیبهشت 1402

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