تحلیل ترمودینامیکی - اقتصادی سامانه چندمنظوره بازیافت گاز فلر همراه با پیشگرمایش نفت خام

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی مکانیک، دانشگاه کاشان، کاشان، ایران

چکیده

گاز فلر، محصول جانبی استخراج نفت، معمولاً بدون استفاده مفید سوزانده می‌شود درحالی که ظرفیت بالایی برای بازیافت انرژی دارد. در این پژوهش به طراحی و تحلیل یک سامانه چندمنظوره برای استفاده از گاز فلر در تولید هم‌زمان توان، آب شیرین، هیدروژن و حرارت پرداخته شده است. سامانه پیشنهادی شامل چرخه توان کربن‌دی‌اکسید فوق‌بحرانی، مولد ترموالکتریک، پیش‌گرمایش نفت خام، واحد نمک‌زدایی اسمز معکوس و تولید هیدروژن در الکترولایزر غشای تبادل پروتون است. مدل‌سازی با نرم‌افزار حلگر معادلات مهندسی انجام و با تحلیل‌های انرژی، اگزرژی و اگزرژی-اقتصادی ارزیابی شده است. نوآوری پژوهش ارائه سامانه‌ای یکپارچه بوده که با استفاده از گاز فلر تولید چند محصول را بهینه کرده و نیازهای صنعتی و خانگی را تأمین می‌کند. نتایج طراحی پایه نشان می‌دهد بازده انرژی و اگزرژی به‌ترتیب 83/24% و 23/56%، توان خالص خروجی 12/23مگاوات و ظرفیت بار حرارتی 13/39 مگاوات است. تولید هیدروژن 60/93کیلوگرم در روز، آب شیرین 7/106 کیلوگرم بر ثانیه، نرخ کل هزینه‌های تولید اگزرژی، تخریب اگزرژی و سرمایه‌گذاری به‌ترتیب 96/2982، 347/58 و 645/84 دلار بر ساعت و دوره بازگشت سرمایه 1/172 سال محاسبه شده است. در نهایت، تأثیر متغیرهای کلیدی بر عملکرد سامانه به کمک تحلیل حساسیت بررسی شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Thermoeconomic Analysis of a Polygeneration System for Flare Gas Recovery with Crude Oil Preheating

نویسندگان [English]

  • Mostafa Mahboobi
  • Ghanbar Ali Sheikhzadeh
  • Abolfazl Fattahi
University of Kashan
چکیده [English]

Flare gas, a byproduct of oil extraction, is usually burned without useful application, despite having a high potential for energy recovery. This study has designed and analyzed a polygeneration system for utilizing flare gas to simultaneously produce power, fresh water, hydrogen, and heat. The proposed system includes a supercritical carbon dioxide power cycle, a thermoelectric generator, crude oil preheating, a reverse osmosis desalination unit, and hydrogen production in a proton exchange membrane electrolyzer. Modeling was performed using Engineering Equation Solver software and evaluated through energy, exergy, and exergoeconomic analyses. The novelty of the study lies in presenting an integrated system that optimizes multi-product generation from flare gas to meet industrial and domestic demands. The basic design results indicate an energy efficiency and exergy efficiency of 83.24% and 23.56%, a net output power of 12.23 MW, and a thermal load capacity of 13.39 MW. Hydrogen production is 60.93 kg/day, fresh water production is 106.7 kg/s, and the total exergy product cost rate, total exergy destruction cost rate, and total investment cost are 2,982.96, 347.58, and 645.84 $/h, respectively, with a payback period of 1.72 years. Finally, the impact of key parameters on the system performance has been examined using sensitivity analysis.

کلیدواژه‌ها [English]

  • Flare Gas Recovery
  • Polygeneration System
  • Thermoeconomic Analysis
  • Waste-to-energy
  • Crude Oil Preheating

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نشریه مهندسی مکانیک امیرکبیر
دوره 57، شماره 5
مرداد 1404
صفحه 633-662

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