نوع مقاله : مقاله پژوهشی
نویسندگان
گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Phase change materials are used in various fields such as electronics, construction, renewable energy, and energy management due to their high energy storage density. However, their low thermal conductivity limits their application and creates a need for methods to enhance conductive heat transfer. In this study, the effect of adding metal fibers on improving the thermal performance of these materials has been investigated experimentally and numerically. Effective parameters, including the type, diameter, length, and volume fraction of metal fibers, have been studied. Experimental results show that adding a very small amount of metal fibers (2%) can increase the thermal conductivity of PCM by up to 4 times. Furthermore, replacing steel fibers with copper fibers under identical conditions leads to a 55% improvement in thermal conductivity.
In the numerical simulation section, which was used to examine a wider range of samples, it was found that the type, orientation, and volume percentage of fibers have the greatest impact on heat transfer. Specifically, increasing the volume fraction from 2.35% to 3.9% results in more than a 50% improvement in effective thermal conductivity. In contrast, a 15-degree increase in the angle of the fibers relative to the direction of heat transfer causes a 31% reduction in this coefficient. Finally, this research presents a new method for studying the microstructure of biphasic fibrous composites and determining their effective thermal conductivity.
کلیدواژهها [English]
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