مکانیک هوافضا

مکانیک هوافضا

تأثیر حضور نانوذرات تک نوع مختلف بر عملکرد یک گیرنده سهموی خورشیدی با نوارهای پیچشی در لوله جاذب

نوع مقاله : گرایش پیشرانش و انتقال حرارت

نویسندگان
1 کارشناسی ارشد، دانشگاه الزهرا، تهران، ایران
2 استادیار، دانشگاه الزهرا، تهران، ایران
3 کارشناسی ارشد ،دانشگاه علم و صنعت ایران، تهران، ایران
چکیده
در این پژوهش، عملکرد حرارتی - هیدرولیکی یک گیرنده خورشیدی سهموی مجهز به نوارپیچشی داخل لوله جاذب با استفاده از نانوسیالات مختلف به‌صورت عددی بررسی شده است. نانوسیالات موردمطالعه شامل نانوذرات آلومینیوم اکسید (Al₂O₃)، گرافن (Graphene)، سیلیکون کاربید (SiC)، اکسید روی (ZnO) و دی‌اکسید تیتانیوم (TiO₂) پراکنده‌شده در سیال پایه Syltherm 800 در کسرهای حجمی 1/0، 3/0 و 5/0 درصد هستند. شبیه‌سازی‌های عددی با استفاده از نرم‌افزار ANSYS Fluent و مدل آشفتگی realizable k-ε در بازه عدد رینولدز 9200 تا 115000 انجام شده است. نتایج نشان می‌دهد که افزودن نانوذرات به‌طورکلی موجب افزایش عدد ناسلت و بهبود انتقال حرارت می‌شود، اما میزان این بهبود به نوع و غلظت نانوذره وابستگی زیادی دارد. در میان نانوسیالات بررسی‌شده، آلومینیوم اکسید و سیلیکون کاربید در غلظت 3/0 درصد بهترین تعادل بین افزایش انتقال حرارت و افت فشار را ارائه می‌دهند. در مقابل، گرافن در غلظت 5/0 درصد بیشترین بهبود حرارتی را نشان می‌دهد. در مجموع، نتایج بیانگر پتانسیل قابل‌توجه نانوسیالات در بهبود عملکرد کلکتورهای خورشیدی سهموی است.

چکیده تصویری

تأثیر حضور نانوذرات تک نوع مختلف بر عملکرد یک گیرنده سهموی خورشیدی با نوارهای پیچشی در لوله جاذب
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Effect of Different Single Nanoparticles on the Performance of a Parabolic Trough Solar Receiver Equipped with Twisted-Tape Inserts

نویسندگان English

Donya Sabaghchi 1
Mohammad Sadegh Abedinejad 2
ALI REZA Teymoori 3
1 Master's Degree, Alzahra University, Tehran, Iran
2 Assistant Professor, Alzahra University, Tehran, Iran
3 Master's Degree, Iran University of Science and Technology, Tehran, Iran
چکیده English

In this study, the thermal–hydraulic performance of a parabolic solar receiver equipped with twisted tapes inside the absorber tube is numerically investigated using various nanofluids. The studied nanofluids consist of aluminum oxide (Al₂O₃) , graphene, silicon carbide (SiC), zinc oxide (ZnO), and titanium dioxide (TiO₂) nanoparticles dispersed in Syltherm 800 as the base fluid at volume concentrations of 1.0%, 3.0%, and 5.0%. Numerical simulations are performed using ANSYS Fluent with the realizable k–ε turbulence model over a Reynolds number range of 9200 to 115000. The results indicate that the addition of nanoparticles generally enhances the Nusselt number and improves heat transfer performance; however, the magnitude of enhancement strongly depends on the nanoparticle type and its volume concentration. Among the investigated nanofluids, aluminum oxide and silicon carbide at a concentration of 3.0% provide the best compromise between heat transfer enhancement and pressure drop. In contrast, graphene exhibits the highest thermal enhancement at a concentration of 5.0%. Overall, the findings demonstrate the significant potential of nanofluids for improving the performance of parabolic solar collectors.

کلیدواژه‌ها English

Thermal Enhancement Factor
Nanofluids
Temperature
Parabolic Trough Receiver
Twisted Tape
Solar Collector


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  • تاریخ دریافت 22 فروردین 1405
  • تاریخ بازنگری 16 خرداد 1405
  • تاریخ پذیرش 28 خرداد 1405
  • تاریخ انتشار 10 مرداد 1405