مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تحلیل ترمودینامیکی و بهینه‌سازی یک سیستم نوین ترکیبی پیل سوختی اکسید جامد با گازساز زیست توده و لوله‌های حرارتی

نویسندگان
پریسا مجاور 1
شهرام خلیل آریا 2
عطا چیت ساز خویی 3
1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه ارومیه، ارومیه، ایران
2 هیئت علمی دانشگاه ارومیه
3 استادیار دانشکده مکانیک دانشگاه ارومیه
چکیده
در تحقیق حاضر، یک سیستم ترکیبی جدید، متشکل از گازساز زیست توده، لوله‌های حرارتی دما بالای سدیم و پیل سوختی اکسید جامد معرفی شده است. سیستم ترکیبی حاصل، به علت بازده و توان بالا به منظور تولید همزمان توان الکتریکی و حرارت مورد توجه قرار گرفته است. از ثابت‌های تعادل و قانون بقای جرم و انرژی برای مدل‌سازی سیستم استفاده شده و مدل‌سازی و تجزیه و تحلیل سیستم در نرم افزار EES انجام گرفته است. پس از حصول اطمینان از صحت مدل‌سازی انجام گرفته در تطابق با نتایج تجربی، اثر STBR گازساز، چگالی جریان، ضریب مصرف سوخت و دمای خروجی پیل سوختی به عنوان پارامترهای متغیر بر روی توان تولیدی و بازده کلی سیستم توسط روش رویه پاسخ بررسی گردید. نتایج تحلیل واریانس نشان داد که پارامترهای ضریب مصرف سوخت (با میزان تاثیرگذاری 53%) و چگالی جریان (با میزان تاثیرگذاری 33%) به ترتیب موثرترین پارامتر بر روی توان خروجی سیستم و بازده انرژی کلی می‌باشند. با افزایش دما، توان سیستم ترکیبی افزایش می‌یابد در حالیکه با افزایش ضریب مصرف سوخت، توان خروجی از سیستم رفتار افزایشی و سپس کاهشی دارد. همچنین افزایش دما و STBR سبب افزایش بازده کلی سیستم و افزایش چگالی جریان و ضریب مصرف سوخت موجب کاهش آن می‌شود. نتایج حاصله نشان داد که در بهینه‌ترین حالات با تنظیم صحیح پارامترهای موثر، توان خروجی سیستم و بازده کلی را می‌توان به ترتیب تا مقادیر 300 kW و 90% افزایش داد.
کلیدواژه‌ها
پیل سوختی اکسید جامد
گازساز
زیست توده
لوله حرارتی
روش رویه پاسخ

عنوان مقاله English

The thermodynamic analysis and optimization of a novel integrated solid oxide fuel cell system with biomass gasification and heat pipes

نویسندگان English

Parisa Mojaver 1
Shahram Khalilarya 2
Ata Chitsaz Khoyi 3
1 Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Irna
2 professor at mechanical engineering college of Urmia university
3 Assistant professor at mechanical engineering college of Urmia university
چکیده English

In the present study, a novel integrated system containing biomass gasifier, sodium high-temperature heat pipes, and solid oxide fuel cells is introduced. The integrated system is taken into consideration due to its high efficiency and power in order to simultaneous producing electrical power and heat. The modeling of system is performed using equilibrium constants, mass and energy conservation law and the analysis of codes is done in EES software. The effect of gasifier STBR, current density, fuel utilization factor, and outlet fuel cell’s temperature as variable parameters is investigated on the power and total energy efficiency of integrated system using response surface method; after validation of modeling in comparison to the experimental results. The analysis of variance results indicate that fuel utilization factor (with 53% contribution) and current density (with 33% contribution) are the most effective parameter on the power and total efficiency, respectively. The power of integrated system is increased by increasing of temperature while power has an increasing behavior follows by decreasing behavior by increasing fuel utilization factor. The total efficiency is increased by increasing temperature and STBR while it is decreased by increasing current density and fuel utilization factor. The results revealed that the power and total efficiency is obtained at optimum states as high as 300 kW and 90%, respectively.

کلیدواژه‌ها English

Solid oxide fuel cell
Gasifier
Biomass
Heat pipe
Response surface method
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مهندسی مکانیک مدرس
دوره 18، شماره 3
خرداد 1397
صفحه 339-350