Heat transfer performance of the finned nano-enhanced phase change material system under the inclination influence
Heat transfer performance of the finned nano-enhanced phase change material system under the inclination influence
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DOI：
10.1016/j.ijheatmasstransfer.2019.02.045
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发表时间：
2019-06-01
影响因子：
5.2
通讯作者：
Sheremet, Mikhail A.
中科院分区：
文献类型：
--
作者：
Bondareva, Nadezhda S.;Buonomo, Bernardo;Sheremet, Mikhail A.
石蜡等材料在现代能源工业中广泛使用。在恒温条件下，相变过程中吸收大量能量的能力允许存储和传输热量。熔融强度与材料的热物理特性和体系的几何参数有关。系统内部传热是通过热传导进行的，而在熔体中对流传热则加剧了这一过程。本文对纳米颗粒填充石蜡并由定容热源加热的区域内的传热进行了数值研究。考虑熔体中发生的自然对流换热，建立了以“流函数-涡度温度”为无因次变量的熔体过程二维模型。用有限差分法求解了这个偏微分方程组。在考虑的系统的不同倾角下进行了仿真。得到了系统在不同加热水平下熔化过程的局部特征和整体特征。(C) 2019 Elsevier Ltd.版权所有。
The use of materials such as paraffin is widespread in modern energy industries. The ability to absorb a large amount of energy during a phase transition at a constant temperature conditions allows to store and transport the heat. The intensity of melting is related to the thermophysical characteristics of the material and the geometric parameters of the system. Heat transfer inside the system is carried out due to the heat conduction, while in the melt the convective heat transfer intensifies the process. In this paper, a numerical study of heat transfer inside a domain filled with paraffin with nanoparticles and heated from a source of constant volumetric heat generation is performed. A two-dimensional model of the melting process has been formulated in the dimensionless variables "stream function-vorticity temperature", taking into account the natural convective heat transfer occurring in the melt. The system of partial differential equations has been solved using the finite difference method. The simulation has been carried out at different inclination angles of the considered system. Local and integral characteristics of the melting process at different heating levels of the system have been obtained. (C) 2019 Elsevier Ltd. All rights reserved.