مطالعه تجربی رسانایی حرارتی نانوسیال هیبریدی (MWCNT و SiO2) در سیال پایه اتیلن گلیکول و آب و ارائه یک رابطه تجربی جدید

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، دانشگاه جامع امام حسین (ع)، تهران، ایران

2 دانشجوی کارشناسی ارشد، دانشگاه جامع امام حسین (ع)، تهران، ایران

چکیده

این مطالعه تجربی یک کاوش تجربی از خواص حرارتی و ضریب هدایت حرارتی یک نانوسیال هیبریدی حاوی 89 درصد حجمی دیاکسید سیلیکون (SiO2) و 11 درصد حجمی نانولوله‌های کربنی چنددیواره (MWCNT) پراکنده شده در ترکیبی از45 درصد حجمی اتیلن گلیکول و 55 درصد حجمی آب ارائه می‌کند. نانوسیال هیبریدی به‌دقت با استفاده از روش دومرحله‌ای تهیه شد و هدایت حرارتی آن به طور سیستماتیک در کسرهای حجمی (%1/0 تا %45/1) و دماهای (°C7/26 تا °C50) اندازه‌گیری شد. با استفاده از دستگاه KD2 Pro، هدایت حرارتی نسبی به صورت تجربی تعیین شد، که بیشترین درصد افزایش را در کسر حجمی %45/1 و دمای °C50 به میزان %1/25 نشان داد. سپس دادههای تجربی با استفاده از روش سطح پاسخ در نرم افزار Design Expert مورد تجزیه و تحلیل قرار گرفت. همبستگی جدید توسط یک معادله چند جملهای درجه 5 ایجاد شد، که تعامل پیچیده دما و کسر حجمی را برای نانوسیال هیبریدی در بر میگیرد. همبستگی تجربی ایجاد شده دارای دقت قابل توجهی با ضریب تعیین (9996/0=R2) میباشد. همچنین حاشیه انحراف برای روش سطح پاسخ %238/0>MOD>355%/0- بود که نشانه دقت بالای مدل است.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental study of thermal conductivity in a hybrid nanofluid (MWCNT and SiO2) in the base fluids of ethylene glycol and water and presentation of a new experimental Correlation

نویسندگان [English]

  • Mohammad Hemmat Esfe 1
  • Hamed Sharifi Doost 2
1 Associate Professor, Imam Hossein University , Tehran, Iran
2 Master's student, Imam Hossein University , Tehran, Iran
چکیده [English]

This experimental study investigates the thermal properties and conductivity of a hybrid nanofluid composed of 89 % SiO2 and 11 % MWCNT in a mixture of 45 % ethylene glycol and 55 % water . The nanofluid was prepared using a two - step method, and its thermal conductivity was measured across various volume fractions ( ranging from 0.1 % to 1.45 % ) and temperatures ( from 26.7°C to 50°C ) using a KD2 Pro device . The results indicated a 25.1 % increase at a volume fraction of 1.45 % and a temperature of 50° C . By employing the response surface method, a 5th -degree polynomial equation accurately describes the complex interaction between temperature and volume fraction (R2 = 0.9996) . The model's high accuracy is demonstrated by a Response surface method margin of deviation ranging from 0 . 238 % to 0 . 355 % .

کلیدواژه‌ها [English]

  • Hybrid nanofluid
  • Conductive heat transfer
  • Multi-walled carbon nanotube
  • Thermal conductivity coefficient
  • Response surface

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دوره 13، شماره 1 - شماره پیاپی 33
بهار و تابستان 1403
مرداد 1403
  • تاریخ دریافت: 24 فروردین 1403
  • تاریخ بازنگری: 22 خرداد 1403
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  • تاریخ انتشار: 01 مرداد 1403