شبیه‌سازی عددی دریافت‌کنندۀ انرژی خورشیدی سهموی- بشقابی حاوی نانوسیال دوفازی

نویسندگان

1 Department of Mechanical Engineering, University of Kashan, Kashan,I.R.Iran

2 Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, I.R.Iran

چکیده

در این مطالعه، به شبیه‌سازی عددی سه‌بعدی کلکتورهای خورشیدی پارابولیک بشقابی حاوی نانوسیال پرداخته می‌شود. هندسۀ مسئله شامل یک کلکتور خورشیدی پارابولیک بشقابی دارای عایق بافل است. در هندسۀ کلکتور تأثیر تغییر ابعاد بافل‌ها بررسی می‌شود. به‌منظور بررسی تأثیر جریان بر انتقال حرارت چهار عدد رینولدز مختلف در محدودۀ رژیم آشفته جریان (Re =  6000، 9000 12000و 15000) مطالعه شده است. بر اساس نتایج کار تغییرات شرایط محیطی طی ماه‌های مختلف تأثیر قابل ملاحظه‌ای بر عملکرد کلکتور خورشیدیِ مورد بررسی دارد و مقدار انرژی دریافتی را به‌شدت تحت‌تأثیر قرار می‌دهد. با تغییر ماه‌های سال، دمای محیط و تشعشع دریافتی از خورشید متفاوت بوده و این تغییرات تأثیر خود را بر عملکرد حرارتی کلکتور نشان داده‌اند. بر اساس نتایج در ماه ژوئن، بیشترین مقدار انرژی حرارتی به‌ دست آمده است. همچنین تغییر دبی جریان نیز بر عملکرد سیستم به‌شدت تأثیرگذار است و مقدار انرژی حرارتی دریافتی با زیاد شدن دبی افزایش می‌یابد. عدد رینولدز بهینه 15000 می‌باشد که در آن، بیشترین انرژی حرارتی دریافتی وجود خواهد داشت.

کلیدواژه‌ها


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