تحلیل حساسیت جامع عوامل مؤثر بر ضریب رسانش حرارتی مواد تغییر فاز دهنده بهبود یافته با نانو ذرات کربن

غلامی, علی; پورفیاض, فتح اله

doi:10.48311/mme.2025.11467

تحلیل حساسیت جامع عوامل مؤثر بر ضریب رسانش حرارتی مواد تغییر فاز دهنده بهبود یافته با نانو ذرات کربن

نوع مقاله : پژوهشی اصیل

نویسندگان

علی غلامی

فتح اله پورفیاض

دانشگاه تهران

10.48311/mme.2025.11467

چکیده

مواد تغییر فاز دهنده ضریب رسانش حرارتی پایینی دارند که جهت بهبود این کمیت می توان از نانوذرات کربن استفاده نمود. هدف از مطالعه حاضر بررسی اهمیت عوامل مؤثر بر ضریب رسانش حرارتی بهبود یافته و تعیین محدوده مناسب این عوامل برای حصول بیشترین ضریب رسانش حرارتی بهبود یافته است. بدین منظور تعداد 480 داده تجربی حاصل از مطالعات گذشته در زمینه بهبود ضریب رسانش حرارتی با استفاده از نانوذرات کربن جمع آوری شد. سپس این دادهها با استفاده از روش سطح پاسخ و تحلیل واریانس بررسی گردید تا میزان حساسیت پاسخ به هر یک از متغیرهای مستقل مشخص شود. نتایج نشان داد که بیش از %80 تغییرات در ضریب رسانش بهبود یافته در هر دو حالت جامد و مایع ناشی از سه فاکتور غلظت نانوذرات، برهمکنش غلظت نانوذرات و ضریب رسانش حرارتی ماده تغییر فاز دهنده، و برهمکنش غلظت و ضریب رسانش حرارتی نانوذرات است. همچنین تحلیل نمودارهای کانتور نشان داد که حداقل غلظت مورد نیاز برای دستیابی به ضریب رسانش حرارتی بهبود یافته بیشینه در دو فاز جامد و مایع برابر با %6/8 است. علاوه بر این، ضریب رسانش حرارتی بهبود یافته در فاز مایع در غلظتهای کمتر از %1 با افزایش ضریب رسانش حرارتی ماده تغییر فاز دهنده روند صعودی داشته و در غلظتهای بیشتر از %3 با این پارامتر رابطه معکوس دارد. با توجه به تعدد متغیرهای مؤثر، تمرکز بر روی سه پارامتر اشاره شده می تواند به کاهش زمان و هزینه دستیابی به یک ماده تغییر فاز دهنده بهینه در صنعت کمک شایانی نماید

کلیدواژه‌ها

مواد تغییر فاز دهنده

نانو ذرات کربن

رسانش حرارتی

روش سطح پاسخ

تحلیل حساسیت

موضوعات

مواد تغییر فاز دهنده و کاربردها

عنوان مقاله English

Comprehensive Sensitivity Analysis of Carbon Nanoparticles-Enhanced PCMsâ Thermal Conductivity

نویسندگان English

Ali Gholami

Fathollah Pourfayaz

University of Tehran

چکیده English

Phase change materials (PCMs) have low thermal conductivity, which can be improved by incorporating carbon nanoparticles. The aim of the present study is to examine the factors influencing improved thermal conductivity and to determine the optimal range of these factors for achieving the highest enhanced thermal conductivity. For this purpose, 480 experimental data points from previous studies on improving thermal conductivity using carbon nanoparticles were collected. These data were then analyzed using design of experiments (DOE), response surface methodology (RSM), and analysis of variance (ANOVA) to identify the sensitivity of the response to each independent variable. The results showed that over 80% of the changes in improved thermal conductivity in both solid and liquid phases were due to three factors: the concentration of nanoparticles, the interaction between nanoparticle concentration and the thermal conductivity of the phase change material, and the interaction between nanoparticle concentration and the thermal conductivity of the nanoparticles. Contour plots indicated that the minimum required concentration for achieving the maximum improved thermal conductivity in both solid and liquid phases is 8.6 wt%. Furthermore, when the nanoparticle concentration was below 1 wt%, the thermal conductivity of the liquid phase showed a positive correlation with the thermal conductivity of the pure PCM. This correlation became negative at nanoparticle concentrations exceeding 3 wt%. Given the several factors affecting PCM’s thermal conductivity, focusing on the three mentioned parameters can help reduce the time and cost involved in manufacturing optimal PCMs at industrial scale

کلیدواژه‌ها English

Phase change material

Carbon nanoparticles

thermal conductivity

response surface methodology

Sensitivity Analysis

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