Experimental investigation of relative thermal conductivity of MWCNTs-CuO/Water nanofluids
محورهای موضوعی : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیکمسعود زاده‌خواست 1 , داود طغرایی 2 , آرش کریمی‌پور 3
1 - دانشجوی کارشناسی ارشد، دانشکده مکانیک، دانشگاه آزاد اسلامی واحد نجف آباد
2 - رئیس دانشکده مکانیک
3 - استادیار، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد نجف آباد، ایران، اصفهان
کلید واژه: temperature, Nanofluid, Thermal conductivity, volume fraction, Carbon nano tubes,
چکیده مقاله :
This work presents a model for calculating the effective thermal conductivity of nanofluids. The proposed model includes the effects of nanoparticles and thermal conductivity base fluid.We will focus on experimental of the volume concentration parameter and temperature on thermal conductivity, nano-fluid combination and Multi-Walled Carbon nanotubes-Oxide / Copper-paid deionized Water. This water-based nanofluids, For two-step volume fractions of the 0.1, 0.2, 0.6 Percentage produced And then, Effective thermal conductivity is measured precisely. In order to measure the thermal conductivity of nanofluids. To measure the thermal conductivity coefficient in THW method, KD2-pro and KS1 probe was used, also with the fluid significantly enhancement shows in thermal conductivity coefficient. Also with the fluid significantly enhancement shows in thermal conductivity coefficient. In lower volume fractions we observed significantly increase in thermal conductivity and receive high degree thermal. Due to the lack of similar studies Due to the lack of similar studies to comprehensively and inefficient of classical thermal conductivity, In order to estimate the thermal conductivity of nanofluids An empirical model that estimates the thermal conductivity of nanofluids model with deviation margin is very low
در این بررسی آزمایشگاهی تأثیر پارامترهای کسر حجمی و دما بر ضریب هدایت گرمایی نسبی، نانو لولههای کربنی و نانو سیال جدید و پرکاربرد اکسید مس- آب دیونیزه پرداخته میشود. نانوسیال با غلظت های حجمی 1/0، 2/0، 6/0 درصد حجمی برای بررسی تأثیر کسر حجمی بر ضریب هدایت گرمایی نسبی آماده شد. همچنین برای بررسی اثر دما، دما به محدودههای30، 40، 50 درجه سلسیوس محدود شد. برای اندازه گیری ضریب هدایت گرمایی نسبی از روش سیم داغ گذرا با استفاده از دستگاه سیم داغ گذرا و پراب استفاده شد. با افزایش دما و افزایش کسر حجمی ضریب هدایت گرمایی نانو سیال در مقایسه با سیال پایه افزایش چشمگیری دارد. در کسرهای حجمی پایین افزایش ضریب هدایت گرمایی چشمگیرتر است. در نتیجه توانستیم با دماها و کسرحجمیهای مختلف به افزایش ضریب هدایت گرمایی در حدود 7/38 درصد دست یابیم که تا به حال در این زمینه کسی اطلاعاتی ارائه نداده است
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