PEG 1500在垂直和水平环形外壳中的熔化/凝固过程

Q4 Energy
F. Hamad, E. Egelle, A. Mohammed, S. Gooneratne, P. Russell
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引用次数: 1

摘要

在本文中,主要目的是研究聚乙二醇1500 (PEG 1500)用于储能-保温的基本熔化/凝固过程,以延长管道在意外关闭条件下的冷却时间,防止/减少蜡沉积和水合物的形成。之所以选择聚乙二醇1500,是因为它的熔融温度>317 K,是防止海底输油管道中蜡沉积和水合物形成的滞后材料的合适选择。用有机玻璃设计了实验装置,以深入了解熔融过程。垂直和水平环形几何形状用于考虑实际情况。垂直环形箱体长度为950mm,宽度为34mm(高/宽=27.94)。水平环形外壳长度为300mm,宽度为15.9 mm(高/宽=18.87)。利用热电偶和摄像机采集了三种情况下的内壁温度:333 K、343 K和353 K的数据,其中为相变材料(PCM)在两种情况下增加的热量。主要结论是:水平环壳比垂直环壳的熔化速度更快,特别是在更高的受热面温度为353 K时,ii)内部区域温度保持较长时间,这为支持PCM作为储热隔热材料的概念提供了很好的证据;iii)在333 K时,水平情况下的熔化率比垂直情况下的熔化率高100%,而在343 K时,熔化率降低到20%左右;iv)提高受热面温度大大减少了两个方向的总熔化时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Melting/Solidification Processes of PEG 1500 in Vertical and Horizontal Annular Enclosure
In this paper, the primary aim is to look at the fundamental melting/solidification processes of polyethylene glycol 1500 (PEG 1500) for energy storage – insulation to prolong the cooling time of pipelines in unexpected shut-down conditions, prevent/minimize the wax deposition, and hydrate formation. Polyethylene glycol 1500 was selected because its melting temperature is >317 K making it a suitable candidate as lagging material to prevent wax deposition and hydrate formation in subsea oil pipelines. Experimental apparatus was designed with the Perspex to give an insight into the melting process. Vertical and horizontal annular geometries were used to consider the real-life cases. The vertical annular enclosure length is 950 mm and 34 mm width (Height/Width=27.94). The horizontal annular enclosure length is 300mm and 15.9 mm width (Height/Width=18.87). The thermocouples and camera are used to collect the data for three cases of inner wall temperature of 333 K,343 K and 353 K where is the heat added to the phase change material (PCM) for both cases. The main conclusions are: i) the horizontal annular case melt faster than the vertical case, in particular, at higher heating surface temperature of 353 K, ii)The temperature of the inner region was remained hot for long time which provide a good evidence that support the concept of using the PCM as heat storage–insulation material; iii) the melting percentage for horizontal case is 100% higher from the melting percentage of vertical case at 333 K which reduced to about 20% for 343 K, iv) increasing the heating surface temperature substantially reduces the total melting time for both orientations.
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来源期刊
Journal of Nuclear Energy Science and Power Generation Technology
Journal of Nuclear Energy Science and Power Generation Technology Energy-Energy Engineering and Power Technology
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