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Experimental investigations of phase change material filled rectangular enclosure with inclined top and side heating mode
Journal of Energy Storage ( IF 8.9 ) Pub Date : 2020-09-02 , DOI: 10.1016/j.est.2020.101799
Tushar Sathe , A.S. Dhoble

An experimental examinations has been conducted on an inclined top and side heating mode phase change material (PCM) filled rectangular enclosure to understand its applicability in various thermal applications like: photovoltaic (PV) thermal management systems, concentrated PV systems, building thermal management and so on. The basic objective of this research work is to experimentally analyze the melt front propagation and temperature distribution of the PCMs in rectangular enclosure with the top heating mode; which is very rarely available in the literature. Lauric acid and paraffin wax are used during an experimentations as the PCMs. The inclination angles of PCM enclosure are varied with 30°, 60° and 90° with the horizontal. Constant heat flux are applied on the heater surface using halogen lamp assembly. The heat input to the 30° and 60° inclined systems are from top side and for 90° system, the heat input is from the right side. Solid-liquid interface transition of the PCMs and its various heat transfer characteristics are explained in the present research work during the charging period. The result shows that the convection currents inside the PCM container plays the major role on PCMs heat transfer characteristics at different inclination angles. The melting rate of PCMs increases with the increase in the inclination angles; however, the heater plate temperature is observed to be smaller at high inclined systems. Heat transfer from the heater plate to the PCMs are very high during the initial period and it decreases as the time progresses.



中文翻译:

顶部和侧面倾斜加热模式的相变材料填充矩形外壳的实验研究

已经对倾斜的顶部和侧面加热模式相变材料(PCM)填充的矩形外壳进行了实验检查,以了解其在各种热应用中的适用性,例如:光伏(PV)热管理系统,集中式PV系统,建筑物热管理等上。这项研究工作的基本目的是通过实验分析矩形加热方式为矩形的矩形外壳中PCM的熔体前沿传播和温度分布。这在文献中很少见。在实验过程中使用月桂酸和石蜡作为PCM。PCM外壳的倾斜角度与水平方向的角度分别为30°,60°和90°。使用卤素灯组件在加热器表面上施加恒定的热通量。30°和60°倾斜系统的热量输入是从顶部开始的,而90°系统的热量输入是从右侧输入的。在充电期间,本研究工作解释了PCM的固液界面转变及其各种传热特性。结果表明,在不同倾角下,PCM容器内部的对流对PCM的传热特性起主要作用。PCM的熔化速率随倾斜角的增加而增加;但是,在高倾斜系统中,观察到加热板温度较低。在初始阶段,从加热板到PCM的热传递非常高,并且随着时间的流逝而减少。在充电期间,本研究工作解释了PCM的固液界面转变及其各种传热特性。结果表明,在不同倾角下,PCM容器内部的对流对PCM的传热特性起主要作用。PCM的熔化速度随倾斜角的增加而增加;但是,在高倾斜系统中,观察到加热板温度较低。在初始阶段,从加热板到PCM的热传递非常高,并且随着时间的流逝而减少。在充电期间,本研究工作解释了PCM的固液界面转变及其各种传热特性。结果表明,在不同倾角下,PCM容器内部的对流对PCM的传热特性起主要作用。PCM的熔化速度随倾斜角的增加而增加;但是,在高倾斜系统中,观察到加热板温度较低。在初始阶段,从加热板到PCM的热传递非常高,并且随着时间的流逝而减少。结果表明,在不同倾角下,PCM容器内部的对流对PCM的传热特性起主要作用。PCM的熔化速率随倾斜角的增加而增加;但是,在高倾斜系统中,观察到加热板温度较低。在初始阶段,从加热板到PCM的热传递非常高,并且随着时间的流逝而减少。结果表明,在不同倾角下,PCM容器内部的对流对PCM的传热特性起主要作用。PCM的熔化速度随倾斜角的增加而增加;但是,在高倾斜系统中观察到加热板温度较低。在初始阶段,从加热板到PCM的热传递非常高,并且随着时间的流逝而减少。

更新日期:2020-09-02
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