Alqaed Saeed, Mustafa Jawed, Almehmadi Fahad Awjah, Alharthi Mathkar A, Sharifpur Mohsen, Cheraghian Goshtasp
Mechanical Engineering Department, College of Engineering, Najran University, P.O. Box 1988, Najran 61441, Saudi Arabia.
Department of Applied Mechanical Engineering, College of Applied Engineering, Muzahimiyah Branch, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
Materials (Basel). 2022 Oct 29;15(21):7613. doi: 10.3390/ma15217613.
The finite element (FEM) approach is used in this study to model the laminar flow of an eco-friendly nanofluid (NF) within three pipes in a solar system. A solar panel and a supporting phase change material (PCM) that three pipelines flowed through made up the solar system. An organic, eco-friendly PCM was employed. Several fins were used on the pipes, and the NF temperature and panel temperature were measured at different flow rates. To model the NF flow, a two-phase mixture was used. As a direct consequence of the flow rate being raised by a factor of two, the maximum temperature of the panel dropped by 1.85 °C, and the average temperature dropped by 1.82 °C. As the flow rate increased, the temperature of the output flow dropped by up to 2 °C. At flow rates ranging from low to medium to high, the PCM melted completely in a short amount of time; however, at high flow rates, a portion of the PCM remained non-melted surrounding the pipes. An increase in the NF flow rate had a variable effect on the heat transfer (HTR) coefficient.
本研究采用有限元法（FEM）对太阳能系统中三根管道内的环保型纳米流体（NF）层流进行建模。太阳能系统由一块太阳能板和三根管道从中流过的支撑相变材料（PCM）组成。采用了一种有机环保型PCM。管道上使用了若干翅片，并在不同流速下测量了NF温度和面板温度。为了对NF流动进行建模，使用了两相混合物。流速提高两倍的直接结果是，面板的最高温度下降了1.85°C，平均温度下降了1.82°C。随着流速增加，输出流的温度下降了2°C。在低、中、高流速范围内，PCM在短时间内完全熔化；然而，在高流速下，管道周围仍有一部分PCM未熔化。NF流速的增加对传热（HTR）系数有不同的影响。
