مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تحلیل انرژی و اگزرژی و بهینه سازی یک سیستم تولید چندگانه با تلفیق سیکل‌های توربین گاز- راکتور هلیوم مدولار، تبرید جذبی، ریفرمینگ بخار آب و آب شیرین‌کن رطوبت‌زن- رطوبت‌زدا

نوع مقاله : پژوهشی اصیل

نویسندگان
گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران
چکیده
در این مقاله، یک سیستم نوین تولید چندگانه بر مبنای سیکل توربین گاز- راکتور هلیوم مدولار ارایه شده است. سیستم یکپارچه از سیکل توربین گاز- راکتور هلیوم مدولار به‌عنوان سیکل مبنا و از ترکیب زیرسیستم‌های تولید هیدروژن، سیکل تبرید جذبی، سیستم آب‌شیرین‌کن تشکیل شده است. مدل‌سازی جامع ترمودینامیکی (انرژی و اگزرژی) روی سیستم پیشنهادی صورت گرفته است. اثر پارامترهای مختلف سیستم از قبیل دمای ورودی توربین، نسبت فشار کمپرسور، نسبت مولی کربن‌دی‌اکسید به متان، دمای ژنراتور بخار و نسبت دبی جرمی سیستم آب‌شیرین‌کن روی عملکرد سیستم کلی مورد ارزیابی قرار گرفته است. همچنین بهینه‌سازی سیستم کلی با استفاده از روش بهینه‌سازی تک و چندهدفه در مقایسه با حالت مبنا از نظر انرژی و اگزرژی بررسی شده است. نتایج نشان دادند که ماکزیمم مقدار توان خالص خروجی و بازده انرژی و اگزرژی سیستم کلی در نسبت فشار کمپرسور بین ۲/۴۵-۲/۳ به‌ترتیب برابر ۲۷۵مگاوات، ۷۲/۰۵ و ۴۹/۳۵% به‌دست آمده و با افرایش دمای ورودی توربین، نرخ تولید گرما و بازده انرژی و اگزرژی سیستم کلی افزایش و نرخ تولید آب شیرین و سرما کاهش می‌یابد. علاوه بر این نقطه بهینه نسبت دبی جرمی سیستم آب‌شیرین‌کن برای بازده انرژی و اگزرژی سیستم کلی برابر ۲/۸۵۷ حاصل شده است. مطابق نتایج به‌دست آمده در روش بهینه‌سازی چندهدفه، بازده انرژی و اگزرژی سیستم کلی در مقایسه با حالت مبنا به‌ترتیب برابر ۷۴/۴۱ و ۲۱/۵۰% به‌دست آمده و میزان تخریب اگزرژی به میزان ۰/۷۴% کاهش یافته است.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Energy and Exergy Analysis and Optimization of a Multigeneration System by Coupling of GT-MHR Reactor, Absorption Refrigeration, Steam Reforming, and HDH Desalination Cycles

نویسندگان English

S. Ghavami Gargari
H. Ghaebi
M. Rahimi
Mechanical Engineering Department, Engineering Faculty, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده English

In this paper, a novel multi-generation system based on gas turbine-modular helium reactor cycle is presented. Integrated system consists of a Gas turbine-modular helium reactor cycle as a base cycle and from the combination of subsystems, hydrogen production, absorption refrigeration cycle, and desalination system. Thermodynamic comprehensive modeling (energy and exergy) was done on the suggested system. The effect of various system parameters, such as turbine inlet temperature, compressor pressure ratio, carbon dioxide to methane molar ratio, vapor generator temperature, and mass flow rate of the desalination system have been evaluated on the overall performance of the system. Also, optimization of the overall system using single and multi-objective optimization method has been investigated in terms of energy and exergy compared to the base case. The results showed that the maximum net power output and the energy efficiency and exergy of the overall system in compressor pressure ratio between 2.3-2.45 were 275 MW, 72.05%, and 49.35%, respectively, and with increasing turbine inlet temperature, heat production rate and energy and exergy efficiencies of overall system increases and the cooling production rate and freshwater decreases. In addition, the optimal point of the mass flow ratio of the desalination system for the energy and exergy efficiencies of overall system is 2.857. According to the results obtained in the multi-objective optimization method, the energy and exergy efficiencies of overall system were 74.41% and 50.21%, respectively, and exergy destruction has been reduced to 0.74% compared to base case.

کلیدواژه‌ها English

Multi-generation
Optimization
Hydrogen production
Absorption refrigeration
Desalination
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