بررسی آزمایشگاهی اثر دبی و غلظت نانوسیال گرافن-آب و یافتن شرایط مطلوب به کمک روش تاگوچی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک، دانشگاه فردوسی مشهد، مشهد، ایران.

2 گروه مهندسی مکانیک، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

در این مقاله به کمک فعال‌کننده سطحی سدیم دودسیل سولفات، نانوصفحه‌های گرافن ‌در سیال پایه آب پایدار گردید. نانوسیال‌ تهیه شده در درصد وزنی‌‌های 0/145-0/01 در تبادل‌گر گرمایی صفحه‌ای واشردار ‌در مجاورت سیال سرد (آب مقطر) قرار گرفت. تمام آزمایش‌ها برای جریان آرام در گستره اعداد رینولدز 1500-500 انجام گردید. اثر تغییر دبی و غلظت نانوسیال بر ضریب کلی انتقال حرارت و افت فشار بررسی شد. مشخص شد که بیشترشدن غلظت، باعث بیشترشدن هم‌زمان هردو عامل می‌گردد، درنتیجه کارایی و اثربخشی نانوسیال نیز مورد آنالیز قرار گرفت.‌ مشخص گردید که بیشترشدن غلظت باعث بیشترشدن اثربخشی نانوسیال و کارایی می‌شود. ‌بیشترین اثربخشی (%89) ‌و کارایی (1/244) در دبی حداقل (2 لیتر بر دقیقه) و غلظت حداکثر (0/145 درصد وزنی) اتفاق می‌افتد. برای یافتن شرایط مطلوب (اثربخشی بالاتر)، به کمک روش تاگوچی، آزمایش‌ها آنالیز گردید و ‌صحت آزمایش‌ها تأیید شد. همچنین مشخص شد که کم شدن دبی (%98/56) اثر بیشتری بر نتایج نسبت به‌ بیشترشدن درصد وزنی(%0/404) دارد.  میزان درصد خطا نیز %0/018 به دست آمد که دقت نتایج را نشان می‌دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental Investigation of Flow Rate and Concentration Effects of Graphene-Water Nanofluid and Finding the Optimal Conditions Using Taguchi Method

نویسندگان [English]

  • omid ramezani azghandi 1
  • Mohammad Javad Maghrebi 2
  • alireza teymourtash 2
1 Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
2 Department of Mechanical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
چکیده [English]

In this paper, graphene nanoplate was stabilized in a water-based fluid by sodium dodecyl sulfate as a surfactant. The prepared nanofluid in weight percentages of 0.01 -0.145 was placed in a gasket plate heat exchanger in the presence of cold fluid (deionized water). All experiments were performed for laminar flow in the range of Reynolds numbers of 500-1500. The effect of flow rate and concentration of nanofluid was investigated on the overall coefficient of heat transfer and pressure drop. The concentration increase causes both to increase at the same time. As a result, heat exchange efficiency and thermal effectiveness of the nanofluid were also analyzed. The highest thermal effectiveness (89%) and efficiency (1.244) occur at a minimum flow rate (2 liters per minute) and maximum weight percentage (0.145) Taguchi method was used to find the optimal conditions and confirm the validity of the experiments. It was also found that the decrease in the flow rate (98.56%) has a greater effect on the results of thermal effectiveness than the increase in concentration (0.404%). The error rate was 0.018%, which shows the accuracy of the results.

کلیدواژه‌ها [English]

  • Graphene nanoplate
  • Surfactant
  • Concentrations
  • Effectiveness

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نشریه مهندسی مکانیک امیرکبیر
دوره 54، شماره 3
خرداد 1401
صفحه 629-648

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