In current solar unit, mirrors with involve of parabolic secondary reflector has been employed to enhance the absorbed radiation flux. The optical efficiency with involve of modified secondary reflector augments about 21%. The absorbed flux profile was added in energy equations as source term and three dimensional turbulent flows have been analyzed. Bottom of the pipe facing with mirrors has greatest radiation flux and its value is 7500 W/m². The top point of pipe has higher radiation flux than left and right sides because of presence of secondary reflector. Water as base fluid inside the pipe was mixed with Al₂O₃. Besides, install of fins has been considered as second approach to help the thermal performance. With increase of fin length and Re, swirl flow enhances and superior cooling obtains which offers thinner boundary layer. At highest values of other factors, growth of Re leads to 0.43% reduction in temperature while rise of T_in makes temperature to augment about 9.97%. The value of ${\eta }_{ex}$ for T_in = 323.15 is 97.43 times greater than that of T_in = 298.15 when Re = 8000 and t = 0. With select of highest values of Re and lowest values of T_in, the finned tube (t = 3 mm) has greatest thermal efficiency.

在当前的太阳能单元中，已经采用了包括抛物线辅助反射器的反射镜来增强吸收的辐射通量。改进的次级反射器的光学效率提高了约21％。作为能量源项，将吸收的通量轮廓添加到能量方程中，并分析了三维湍流。面对镜子的管道底部的辐射通量最大，其值为7500 W / m ²。由于存在辅助反射器，因此管道的顶部比左侧和右侧具有更高的辐射通量。管内作为基础液的水与Al ₂ O ₃混合。此外，安装散热片已被视为提高散热性能的第二种方法。随着翅片长度和Re的增加，涡流增强，获得了出色的冷却效果，从而提供了更薄的边界层。在其他因素最高值，再生长导致减少0.43％的温度，同时的T上升_在品牌温度以增加大约9.97％。的价值${\eta }_{ËX}$ 当Re = 8000且t = 0时，T _in的 = 323.15比T _in = 298.15的97.43倍大。通过选择Re的最大值和T _in的最小值，翅片管（t = 3 mm）最大热效率。