مجله مهندسی مکانیک

مجله مهندسی مکانیک

شبیه سازی عددی تأثیر حضور نانوذرات مغناطیسی داخل هوای مرطوب بر عملکرد آب شیرین کن خورشیدی تحت میدان آهن ربای دائم

نوع مقاله : علمی پژوهشی

نویسندگان
1 دانشجوی دکتری، گروه مهندسی مکانیک، دانشگاه صنعتی ارومیه، ارومیه
2 دانشیار، گروه مهندسی مکانیک، دانشگاه صنعتی ارومیه، ارومیه
چکیده
در مقاله حاضر برای اولین بار تأثیر تزریق نانوذرات مغناطیسی اکسید آهن در داخل هوای مرطوب محفظه آب شیرین‌ کن و نیز اعمال نیروی کلوین ناشی از میدان مغناطیسی آهن ربای دائم بر عملکرد آب‌ شیرین ‌کن خورشیدی به صورت عددی مورد بررسی قرار گرفته‌ است. جهت مدلسازی این پدیده، کد عددی به زبان c++ شی گرا در نرم افزار OpenFOAM توسعه داده شده است. معادلات حاکم شامل پیوستگی، مومنتوم، انرژی و معادله انتقال کسر جرمی بخار هوای مرطوب حاوی نانوذرات مغناطیسی (اصطلاحاً نانوآئروسل مغناطیسی) به روش حجم محدود گسسته و حل شده ‌اند. تأثیر متغیرهای گوناگون شامل پارامترهای مغناطش، زاویه و محل جایگذاری آهن ربا بر الگوی جریان و همینطور دبی آب تولیدی بررسی شده است. نتایج این پژوهش نشان می دهد که بکار بردن نانوآئروسل در غیاب میدان مغناطیسی موجب تضعیف عملکرد آب شیرین کن می شود. به گونه‌ای که میزان تولید آب شیرین با 8% φ=در حدود 23% کمتر از آب شیرین کن با سیال عامل پایه می‌باشد. از طرف دیگر، استفاده از آهن ربای دائم، به عنوان یک منبع کم هزینه مغناطیسی، می تواند دبی آب شیرین تولیدی را تا 260% افزایش دهد که این امر توجیه اقتصادی این روش در توسعه‌ آب‌ شیرین‌ کن های خورشیدی را به همراه خواهد داشت.   
کلیدواژه‌ها

موضوعات


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دوره 33، شماره 4 - شماره پیاپی 157
مهر و آبان 1403
صفحه 37-55

  • تاریخ دریافت 11 مرداد 1403
  • تاریخ بازنگری 10 مهر 1403
  • تاریخ پذیرش 23 مهر 1403