تحلیل حرارتی هیتر ایستگاه‌های تقلیل فشار گاز شهری و محاسبه راندمان و میزان مصرف سوخت و ارائه مدل هندسی بهینه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد اراک، ایران

2 گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه اراک، ایران

چکیده

ایستگاه‌های تقلیل فشار گاز شهری جزء مهم‌ترین قسمت‌های صنعت انتقال گاز می‌باشند که وظیفه آن تنظیم فشار گاز در محدوده‌ استاندارد جهت مصارف مختلف می‌باشد. باعنایت به اینکه انتقال حرارت از منبع تولید انرژی، به‌وسیله سیال واسط به گاز عبوری از هیتر منتقل می‌گردد، به آن‌ها هیتر حمام آب غیر مستقیم گفته می‌شود. هیتر حمام غیرمستقیم آب به منظور گرم کردن گاز قبل از افت فشار مورد استفاده قرار گرفته تا دمای میعانات موجود در گاز به نقطه تشکیل هیدراتها در حین شکستن و کاهش فشار گاز نرسد. باعنایت به توسعه گازرسانی در کشور ایران و سهم 70% گاز طبیعی از سبد انرژی کشور، تعداد ایستگاه‌های تقلیل فشار گاز و به تبع هیترهای حمام آب غیر مستقیم در صنعت گاز بسیار چشمگیر می‌باشد. در این تحقیق با توجه به مشخصات گاز طبیعی و روابط انتقال حرارت و بقای جرم و معادلات انرژی، تحلیل قابل قبولی از رفتار حرارتی هیترها صورت پذیرفته‌است و مدل‌سازی هیتر با دقت مناسبی انجام شده و تاثیر پارامترهای هندسی بر عملکرد حرارتی هیتر بررسی شده‌است. با تغییر هندسه هیتر از استوانه‌ای به هندسه مکعبی، نتایج قابل قبولی بدست آمد به گونه ای که راندمان از 31% به 56% افزایش و میزان مصرف سوخت از  kg/s 48/1 تا kg/s 84/0 کاهش می‌یابد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Thermal Analysis of Indirect Water Heater in City Gate Station of Natural Gas and Calculating the Efficiency and Fuel Consumption and Presenting the Optimal Geometric Model

نویسندگان [English]

  • davood shafiei 1
  • alireza mostafavi 2
  • saeid jafari 1
1 Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
2 Department of Mechanical Engineering, Faculty of Engineering, Arak University, Arak, Iran
چکیده [English]

The task of pressure reducing stations is to regulate the gas pressure in the standard range for different uses. The indirect water bath heater is used as part of the gas pressure transfer station to heat the gas before the pressure drops so that the condensate temperature in the gas does not reach the point of hydration formation during breaking and reducing the gas pressure. In this study, according to the characteristics of natural gas and heat transfer relations and mass survival and energy equations, an acceptable analysis of the thermal behavior of heaters has been done and the heater is modeled with appropriate accuracy and the effect of geometric parameters on the heat performance of the heater is investigated. By changing the heater geometry from cylindrical to cubic geometry, acceptable results were obtained by increasing efficiency and reducing fuel consumption.
 

کلیدواژه‌ها [English]

  • Pressure Reduction Station
  • Indirect Water Bath Heaters
  • geometry
  • efficiency
  • Gas Composition
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