Numerical Analysis of Thermal, Fluid, and Electrical Performance of a Photovoltaic Thermal Collector at New Micro-Channels Geometry
Numerical Analysis of Thermal, Fluid, and Electrical Performance of a Photovoltaic Thermal Collector at New Micro-Channels Geometry
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DOI：
10.1115/1.4052672
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发表时间：
2022-06-01
影响因子：
3
通讯作者：
Garcia, Davide Astiaso
中科院分区：
文献类型：
--
作者：
Hoseinzadeh, Siamak;Garcia, Davide Astiaso
本文研究了光伏/热（PV/T）系统中水流的不同路径（直接、螺旋和弯曲），并对它们进行了比较。细胞表面的辐射强度取800 W/m(2)，认为微通道内流体流动为层流。吸收辐射的PV电池是铝制的。利用ansys-fluent软件，采用有限体积法对三种几何形状进行了数值求解。分别基于标准方法、二阶迎风方法和压力链方程半隐式方法（SIMPLE）进行了压力分解、动量和能量离散化以及压力-速度耦合的求解。对于连续性方程和能量方程，认为收敛因子是可尊重的。结果表明：随着雷诺数的增加，电池表面温度和出口流体温度降低；此外，电效率随雷诺数的增加而增加。与其他两种路径相比，弯曲路径具有最高的电效率。Re = 600时，曲线路径的流体压力降幅分别比直接路径和螺旋路径高4%和1.3%。
In this article, different paths (direct, spiral, and curved) for water flow in a photovoltaic/thermal (PV/T) system are studied, and they are compared together. The intensity of radiation to the cell surface is taken 800 W/m(2), and the fluid flow is considered to be laminar in the micro-channels. The PV cell absorbing radiation is of an aluminum type. The numerical solution of the three geometries is carried out using the finite volume method using ansys-fluent software. The pressure decomposition, momentum and energy discretization, and the solution of the pressure-velocity coupling are performed based on the standard method, the second-order upwind method, and the semi-implicit method for pressure-linked equations (SIMPLE) method, respectively. The convergence factor is considered to be respected and for continuity and energy equations. The results indicate that the cell surface temperature and the outlet fluid temperature decrease by increasing the Reynolds (Re) number. Moreover, electricity efficiency increases with the increased Reynolds number. The curved path has the highest electrical efficiency in comparison to other two paths. The decrease in fluid pressure of the curved path in Re = 600 is 4% and 1.3% higher than the direct and spiral paths, respectively.