Fahim Tayeb, Laouedj Samir, Abderrahmane Aissa, Driss Zied, Tag-ElDin El Sayed Mohamed, Guedri Kamel, Younis Obai
Materials and Reactive Systems Laboratory (LMSR), Djillali Liabes University, Sidi Bel Abbes, Algeria.
Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M), Université Mustapha Stambouli de Mascara, Mascara, Algeria.
Front Chem. 2023 Jan 17;10:1089080. doi: 10.3389/fchem.2022.1089080. eCollection 2022.
The current work presents and discusses a numerical analysis of improving heat transmission in the receiver of a parabolic trough solar collector by introducing perforated barriers. While the proposed approach to enhance the collector's performance is promising, the use of obstacles results in increased pressure loss. The Computational Fluid Dynamics (CFD) model analysis is conducted based on the renormalization-group (RNG) k-ɛ turbulent model associated with standard wall function using thermal oil D12 as working fluid The thermo-hydraulic analysis of the receiver tube with perforated obstacles is taken for various configurations and Reynolds number ranging from 18,860 to 81,728. The results are compared with that of the receiver without perforated obstacles. The receiver tube with three holes (PO3) showed better heat transfer characteristics. In addition, the Nusselt number (Nu) increases about 115% with the increase of friction factor 5-6.5 times and the performance evaluation criteria (PEC) changes from 1.22 to 1.24. The temperature of thermal oil fluid attains its maximum value at the exit, and higher temperatures (462.1 K) are found in the absorber tube with perforated obstacles with three holes (PO3). Accordingly, using perforated obstacles receiver for parabolic trough concentrator is highly recommended where significant enhancement of system's performance is achieved.
当前工作展示并讨论了通过引入多孔障板来改善抛物槽式太阳能集热器接收器中热传递的数值分析。虽然所提出的提高集热器性能的方法很有前景，但障碍物的使用会导致压力损失增加。基于重整化群（RNG）k-ɛ湍流模型并结合标准壁面函数，以导热油D12作为工作流体进行了计算流体动力学（CFD）模型分析。对带有多孔障碍物的接收器管进行了各种配置以及雷诺数范围从18860到81728的热工水力分析。将结果与没有多孔障碍物的接收器的结果进行了比较。带有三个孔的接收器管（PO3）显示出更好的传热特性。此外，努塞尔数（Nu）随着摩擦系数增加5 - 6.5倍而增加约115%，性能评估标准（PEC）从1.22变为1.24。导热油流体的温度在出口处达到最大值，并且在带有三个孔的多孔障碍物吸收管（PO3）中发现了更高的温度（462.1 K）。因此，强烈推荐在抛物槽式聚光器中使用多孔障碍物接收器，因为这样可以显著提高系统性能。
