تحلیل انرژی، اگزرژی و اقتصادی سیستم تولید چند‌گانۀ نوین مبتنی بر منبع زمین‌گرمایی برای تولید توان، حرارت، سرمایش و هیدروژن مایع به روش آبشاری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی مکانیک، دانشکدۀ فنی و مهندسی، دانشگاه ولی عصر(عج) رفسنجان، رفسنجان، ایران

2 استاد، گروه مهندسی مکانیک، دانشکدۀ فنی و مهندسی، دانشگاه شهید باهنر کرمان، کرمان، ایران

3 دانشیار، گروه مهندسی مکانیک، دانشکدۀ فنی و مهندسی، دانشگاه ولی عصر(عج) رفسنجان، رفسنجان، ایران

4 استاد، گروه مهندسی مکانیک، دانشکدۀ فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

چکیده

در مطالعۀ حاضر سیستم جدید تولید چندگانه با استفاده از منبع زمین‌گرمایی به عنوان منبع تأمین انرژی برای تولید الکتریسیته، حرارت، سرما و هیدروژن مایع توسعه داده شده است. سیستم پیشنهادی متشکل از چرخۀ رانکین آلی ترکیب‌شده با مبدل حرارتی داخلی و گرم‌کن آب تغذیه، چرخۀ سرمایش جذبی دو اثره، واحد الکترولایزر غشای تبادل پروتون، منبع زمین‌گرمایی فلش دوگانه و چرخۀ نوین آبشاری مایع‌سازی است. در این مطالعه روش جدید مایع‌سازی آبشاری با دو دمای متغیر به کار گرفته شده است که به صورت مستقل نیتروژن مایع تولید می‌کند و هم‌زمان نیتروژن مایع تولید‌شده در مبدل حرارتی با هیدروژن غوطه‌ور می‌شود. تحلیل ترمودینامیکی و اقتصادی کاملی روی سیستم مورد مطالعه صورت گرفته است. به‌علاوه، مطالعۀ پارامتریک برای ارزیابی تأثیر تغییرات پارامتر‌های کلیدی روی کارایی سیستم در شرایط کاری مختلف انجام شده است. آرایش جدید توسعه‌داده‌شده در مطالعۀ حاضر هماهنگی مناسبی با همدیگر دارد و نتایج نشان می‌دهد عملکرد ترمودینامیکی مطلوبی را از سیستم پیشنهادی شاهد هستیم به صورتی که بازده انرژی 43 درصد و بازده اگزرژی 56 درصد حاصل می‌شود. برای رشد کارایی اقتصادی سیستم پیشنهادی توابع هزینۀ اجزای سیستم به همراه متغیر‌های اقتصادی مورد تجزیه‌وتحلیل قرار می‌گیرند و هزینۀ کل سیستم 37/0 دلار بر گیگاژول محاسبه می‌شود. چرخۀ نوین مایع‌سازی مدل‌سازی‌شده در این مطالعه دارای ضریب عملکرد 36 درصد بوده و بازده اگزرژی این واحد 39 درصد محاسبه می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Energy, Exergy and Economic Analysis of a New Geothermal Resource-Based Multigeneration System For Power, Heat, Cooling and Liquid Hydrogen Production by Cascade Method

نویسندگان [English]

  • Ali Eyvazi 1
  • Mehran Ameri 2
  • Mohammad Shafiey Dehaj 3
  • Hadi Ghaebi 4
1 Department of Mechanical Engineering, Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
2 Department of Mechanical Engineering, Faculty of Engineering, Shahid bahonar University of Kerman, Kerman, Iran
3 Department of Mechanical Engineering, Faculty of Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
4 Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabi, Iran
چکیده [English]

In the present study, a new multi-generation system using geothermal energy as an energy source for the production of electricity, heat, cold and liquid hydrogen has been developed. The proposed system consists of an organic Rankine cycle combined with an internal heat exchanger and feed water heater, a double-effect absorption refrigeration cycle, a proton exchange membrane electrolyzer unit, a dual flash geothermal source and a novel cascade liquefaction cycle. In this study, a new cascade liquefaction method with two variable temperatures has been used, which independently produces liquid nitrogen and simultaneously the produced liquid nitrogen is immersed in a heat exchanger with hydrogen. A complete thermodynamic and economic analysis has been carried out on the studied system. In addition, a parametric study has been carried out to evaluate the effect of changes in key parameters on the efficiency of the system under different operating conditions. The new arrangement developed in the present study has a good coordination with each other and the results show that we witness a desirable thermodynamic performance from the proposed system, such that an energy efficiency of 43% and an exergy efficiency of 56% are achieved. To increase the economic efficiency of the proposed system, the cost functions of the system components are analyzed along with economic variables and the total system cost is calculated to be $0.37/GJ. The new liquefaction cycle modeled in this study has a performance factor of 36% and the exergy efficiency of this unit is calculated to be 39%.

کلیدواژه‌ها [English]

  • Multigeneration system
  • cascade liquefaction cycle
  • geothermal energy
  • economic analysis

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فصلنامه سیستم های انرژی پایدار
دوره 4، شماره 1
دی 1403
صفحه 83-105

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