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بررسی تجربی و عددی تأثیر افزودن الیاف فلزی در بهبود انتقال حرارت هدایت مواد تغییر فاز دهنده | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| دوره 57، شماره 4، تیر 1404، صفحه 521-542 اصل مقاله (1.52 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2025.24293.7855 | ||
| نویسندگان | ||
| محمد جوزی؛ جعفر جماعتی* | ||
| گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران | ||
| چکیده | ||
| روشهای متعددی برای ارتقاء ضریب انتقال حرارت هدایت مواد تغییر فاز دهنده پیشنهاد شده است. در این مقاله تأثیر استفاده از الیاف فلزی برای بهبود انتقال حرارت هدایت در مواد تغییر فاز دهنده به صورت تجربی و عددی بررسی شده است. در همین راستا، اثر جنس، قطر، طول و کسر حجمی الیاف فلزی در بهبود انتقال حرارت هدایت مواد تغییر فاز دهنده بررسی شده است. نتایج تجربی نشان داد که با افزودن کسر حجمی بسیار کمی الیاف فلزی (حدود دو درصد) میتوان ضریب انتقال حرارت مواد تغییر فاز دهنده را تا 4 برابر بهبود بخشید. در دو نمونهی آزمایشی یکسان، هنگامی که از الیاف مسی بجای الیاف استیل استفاده شود ضریب انتقال حرارت ماده تغییر فاز دهنده 55 درصد بهبود مییابد. نتایج شبیهسازی عددی نشان داد، با افزایش کسر حجمی الیاف از 2/35تا 3/9 درصد ضریب انتقال حرارت مؤثر بیش از 50 درصد افزایش خواهد یافت و هنگامی که زاویهی مؤثر الیاف با راستای انتقال حرارت 15 درجه افزایش مییابد، ضریب انتقال حرارت مؤثر 31 درصد کاهش مییابد. در کار حاضر یک روش جدید برای مطالعهی ریزساختار ترکیبات دوفاز فیبری و تعیین ضریب انتقال حرارت مؤثر آنها ارائه شده است. | ||
| کلیدواژهها | ||
| ذخیره انرژی؛ تغییر فاز دهنده؛ الیاف فلزی؛ ضریب انتقال حرارت؛ مواد غیرهمسانگرد | ||
| عنوان مقاله [English] | ||
| Experimental and Numerical Investigation of the Effects of Metal Fibers on Heat Conduction in Phase Change Materials | ||
| نویسندگان [English] | ||
| Mohamad Jowzi؛ Jafar Jamaati | ||
| Department of Mechanical Engineering, Faculty of Engineering, Razi University, Iran | ||
| چکیده [English] | ||
| Several methods have been proposed to enhance the thermal conductivity coefficient of phase change materials. In this study, the effect of incorporating metallic fibers on the enhancement of thermal conductivity in PCMs is investigated through both experimental and numerical approaches. The impact of fiber material, diameter, length, and volume fraction on the conductive heat transfer performance of PCMs has been investigated. Experimental results demonstrate that the addition of a small volume fraction of metallic fibers (approximately 2%) can improve the thermal conductivity of PCMs by up to four times. In two identical experimental setups, replacing steel fibers with copper fibers resulted in a 55% increase in thermal conductivity. The numerical results indicate that increasing the volume fraction of fibers from 2.35% to 3.9% leads to an improvement of more than 50% in the effective thermal conductivity. On the other hand, increasing the orientation angle of the fibers by 15 degrees relative to the direction of heat flow results in a 31% decrease in thermal conductivity. This study also presents a novel approach for evaluating the microstructure of fibrous composites and determining their effective thermal conductivity. | ||
| کلیدواژهها [English] | ||
| Energy Storage, Phase Change Material, Metal Fibers, Effective Thermal Conductivity, Anisotropic Materials | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 352 تعداد دریافت فایل اصل مقاله: 215 |
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