نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران
2 گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران
3 گروه مهندسی مکانیک بیوسیستم ، دانشکده کشاورزی دانشگاه شهرکرد، شهرکرد، ایران
چکیده
در سالهای اخیر افزایش آلودگی هوا، قیمت حاملهای انرژی و تنش آبی به دلیل تغییرات اقلیم باعث شده تا استفاده از انرژیهای تجدیدپذیر بهویژه انرژی خورشیدی افرایش یابد. جمعکنندههای خورشیدی یکی از منابع مهم جمعآوری و تامین انرژی گرمایی هستند. در این راستا بازده و کارایی این کلکتورها و اقدامات لازم برای افزایش این عاملها از اهمیت خاصی برخورار است. لذا در این پژوهش عملکرد روزانه یک بازتابنده فرنل خطی جهت استفاده در سیستم گرمایش یک گلخانه در بهمن ماه در شرایط آب و هوایی شهرکرد بهصورت عددی بررسی خواهد شد. این سامانه دارای یک گیرنده صفحه تخت با 18 مترمربع میدان آینه بوده و به یک مخزن ذخیرهسازی باحجم 250 لیتر متصل شده است. علاوه بر این، بر اساس تعادل انرژی در جمعکننده و مخزن ذخیرهسازی، یک مدل ریاضی برای پیشبینی عملکرد روزانه سامانه مورد نظر تهیه شد. تحلیلها نشان داد که بیشینه بازده حرارتی سامانه برابر با 64 درصد و حداکثر تولید حرارت مفید 1/5 کیلووات است که توانایی گرمایش محیط گلخانه را در طول شب در ماه بهمن را دارد. همچنین از نتایج این پژوهش میتوان برای ارزیابی سامانههای متمرکز خورشیدی و بهویژه بازتابندههای فرنل خطی استفاده کرد.
کلیدواژهها
موضوعات
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