Abstract




 
   

IJE TRANSACTIONS C: Aspects Vol. 32, No. 3 (March 2019) 445-450   

PDF URL: http://www.ije.ir/Vol32/No3/C/13-3037.pdf  
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  ENERGY AND EXERGY ANALYSIS OF A NEW POWER, HEATING, OXYGEN AND HYDROGEN COGENERATION CYCLE BASED ON THE SABALAN GEOTHERMAL WELLS
 
M. Abdolalipouradl, Sh. Khalilarya and S. Jafarmadar
 
( Received: February 01, 2019 – Accepted in Revised Form: March 07, 2019 )
 
 

Abstract    In this paper, a new power, heating and hydrogen cogeneration cycle from Sabalan geothermal two wells is proposed and analyzed. In the proposed system, a new double flash cycle and organic Rankine cycle are used for power production. A proton exchange membrane (PEM) is also used for hydrogen production and the domestic water heater is used for heating. The impacts of some design parameters, such as separators pressures, evaporator temperature, pinch point temperature difference and PEM temperature on the integrated system performance are investigated and then optimization is done from exergy point of view for three considered scenarios. According to the optimization results, the value of heating, net output power, hydrogen production and thermal and exergy efficiencies of the cogeneration system are obtained as 15751 kW, 18436 kW, 11.13 kg/h, 29.48% and 65.23%, respectively.

 

Keywords    Energy and Exergy Analysis; Sabalan Geothermal Power Plant; Organic Rankine Cycle; Hydrogen Production; Heating

 

چکیده   

در این مقاله امکان استفاده از چرخه ترکیبی جدیدی برای تولید همزمان گرمایش، توان و هیدروژن از چاه¬های زمین گرمایی سبلان مورد بررسی قرار گرفته است. در چرخه پیشنهادی، از یک آرایش جدید تبخیر آنی دو مرحله¬ای و چرخه¬ی رانکین آلی به عنوان چرخه مولد توان، از مبدل حرارتی غشای پروتونی برای تولید هیدروژن و از آبگرمکن داخلی برای گرمایش استفاده شده است. چرخه¬ی پیشنهادی سپس نسبت به پارامترهای مهم عملکرد همانند فشار جداساز اول و دوم، دمای اواپراتور، اختلاف دمای نقطه¬ی تنگش و دمای مبدل غشا پروتونی مورد مطالعه قرار گرفته و سپس برای سه سناریوی مختلف از دیدگاه اگزرژی مورد بهینه-سازی قرار گرفته است. طبق نتایج حاصله در حالت بهینه، برای چرخه¬ی تولید همزمان گرمایش، توان خالص تولیدی، تولید هیدروژن، بازده حرارتی و اگزرژی به ترتیب 15751 کیلووات، 18436 کیلووات، 13/11 کیلو گرم بر ساعت، 48/29 درصد و 23/65 درصد بدست آمد.

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