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Simulation of natural convection of n-Hexadecane paraffin inside a porous chamber
Case Studies in Thermal Engineering ( IF 6.4 ) Pub Date : 2022-07-30 , DOI: 10.1016/j.csite.2022.102275
Guokun Xie , Khaled S. Al-Zahrani , Majdi Talal Amin , Rishabh Chaturvedi , Hazim Moria , Elsayed Tag-Eldin , Fatemeh Shariati

Today, the photovoltaic (PV) system is widely used to convert solar irradiance into electricity; whereas, increasing PV temperature leads to decrement of life and efficiency of PV. Therefore, studying and new novelties for cooling them can play an important role in the PV industry. In this study, a chamber filled with aluminum foam and n-Hexadecane paraffin with a melting temperature of 18°C was installed under a PV. Also, for approaching the numerical results to the real conditions, the solar irradiance was applied as a function of time for 9 h from 8 a.m. to 5 p.m., which radiated the PV’s surface. In addition, the effects of wind speed and ambient temperature by Robbin boundary condition were considered in the PV’s surface. Hence, the finite volume method of computational fluid dynamic was implemented to observe the effects of deflection angle and addition of porous medium with different porosity. The results of current CFD simulation showed that aluminum foam could keep the maximum temperature of PV in near of fusion temperature of PCM resulting reduction of PV temperature; while, inclined angle and different porosity did not affect remarkably the maximum temperature of PV and melting fraction.



中文翻译:

多孔室内正十六烷石蜡的自然对流模拟

今天,光伏(PV)系统被广泛用于将太阳辐照度转换为电能。而光伏温度的升高会导致光伏寿命和效率的下降。因此,研究和冷却它们的新奇事物可以在光伏产业中发挥重要作用。在这项研究中,一个充满泡沫铝和正十六烷石蜡的室,其熔化温度为18°C安装在PV下。此外,为了使数值结果接近真实条件,太阳辐照度作为时间的函数应用了从上午 8 点到下午 5 点的 9 小时,它辐射了光伏表面。此外,在光伏表面考虑了罗宾边界条件对风速和环境温度的影响。因此,采用计算流体动力学的有限体积法,观察偏转角和添加不同孔隙率的多孔介质的影响。目前CFD模拟结果表明,泡沫铝可以使PV的最高温度保持在PCM的熔化温度附近,从而降低了PV温度;而倾斜角和不同孔隙率对PV的最高温度和熔融分数没有显着影响。

更新日期:2022-07-30
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