Hasan Husam Abdulrasool, Sherza Jenan S, Abed Azher M, Togun Hussein, Ben Khedher Nidhal, Sopian Kamaruzzaman, Mahdi Jasim M, Talebizadehsardari Pouyan
Department of Air Conditioning and Refrigeration Techniques, AL-Esraa University College, Baghdad, Iraq.
Air conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Babylon, Iraq.
Front Chem. 2023 Jan 4;10:1074581. doi: 10.3389/fchem.2022.1074581. eCollection 2022.
This article deals with the impact of including transverse ribs within the absorber tube of the concentrated linear Fresnel collector (CLFRC) system with a secondary compound parabolic collector (CPC) on thermal and flow performance coefficients. The enhancement rates of heat transfer due to varying governing parameters were compared and analyzed parametrically at Reynolds numbers in the range 5,000-13,000, employing water as the heat transfer fluid. Simulations were performed to solve the governing equations using the finite volume method (FVM) under various boundary conditions. For all Reynolds numbers, the average Nusselt number in the circular tube in the CLFRC system with ribs was found to be larger than that of the plain absorber tube. Also, the inclusion of transverse ribs inside the absorber tube increases the average Nusselt number by approximately 115% at Re = 5,000 and 175% at Re = 13,000. For all Reynolds numbers, the skin friction coefficient of the circular tube with ribs in the CLFRC system is larger than that of the plain absorber tube. The coefficient of surface friction reduces as the Reynolds number increases. The performance assessment criterion was found to vary between 1.8 and 1.9 as the Reynolds number increases.
本文研究了在带有二次复合抛物面集热器（CPC）的聚光线性菲涅尔集热器（CLFRC）系统的吸收管内设置横向肋片对热性能和流动性能系数的影响。以水作为传热流体，在雷诺数范围为5000 - 13000的情况下，对因不同控制参数变化而导致的传热增强率进行了参数化比较和分析。采用有限体积法（FVM）在各种边界条件下对控制方程进行求解以进行模拟。对于所有雷诺数，带有肋片的CLFRC系统中圆形管内的平均努塞尔数均大于普通吸收管的平均努塞尔数。此外，在吸收管内设置横向肋片后，在Re = 5000时平均努塞尔数增加约115%，在Re = 13000时增加175%。对于所有雷诺数，CLFRC系统中带有肋片的圆形管的表面摩擦系数大于普通吸收管的表面摩擦系数。表面摩擦系数随雷诺数的增加而减小。随着雷诺数的增加，性能评估标准在1.8至1.9之间变化。
