آنالیز انرژی و اگزرژی سطح مدول مولد ترموالکتریک جهت بازیافت گرمای هدر رفته گازهای احتراقی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه مهندسی مکانیک، دانشگاه ارومیه، ارومیه، ایران

2 استاد، گروه مهندسی مکانیک، دانشگاه ارومیه، ارومیه، ایران

چکیده

استفاده از دستگاه­های مولد ترموالکتریک جهت بازیافت گرمای هدر رفته گازهای احتراقی از جایگاه ویژه­ای برخوردار است. در مدل پیشنهادی حاضر، آنالیز ترمودینامیکی همراه با اثر سطح مدول مولد ترموالکتریک روی مشخصات عملکردی دستگاه مطالعه شده است. جهت توسعه مدل، خواص ماده مولد ترموالکتریک وابسته به دما فرض شده است. همچنین ضریب انتقال گرمای جابجایی آب در طول کانال سرد متغییر در نظر گرفته شده است. آثار رژیم جریان آب و سطح مدول هم در جهت طولی و هم به ازای پنج مقدار مختلف از سطرهای مدول روی مشخصات عملکردی دستگاه مورد بررسی قرار گرفته است. نتایج حاکی از آن بود که افزایش تعداد سطرهای مدول و سطح مدول باعث کاهش توان و راندمان­های انرژی و اگزرژی و افزایش نرخ انهدام اگزرژی شد. همچنین سطح مدول در دو حالت مختلف بهینه­سازی شده است. یکی برای دست­یابی به حداکثر توان خالص و دومی برای رسیدن به  حداکثر نسبت توان خالص بیشینه به سطح انجام شد. سطح بهینه در حالت اول و دوم به ترتیب برابر با m24641/0 و m22207/0 بدست آمدند.

کلیدواژه‌ها


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