Abstract In current attempt, swirl generator and four-lobed pipe were installed in a solar collector to achieve higher performance not only in view of cooling rate but also available energy. In outputs, components of irreversibility were illustrated for different values of revolution (N), pumping power (Re (Reynolds number)) and width of tapes (D∗(diameter ratio)). Four functions were scrutinized namely; Xd (exergy loss); Sgen,th (thermal irreversibility); Sgen,f (frictional irreversibility); Φ s (Augmented irreversibility). Experimental articles were utilized to not only verify the nanofluid modeling but also the correctness of selecting k-ϵ turbulent model. Sgen,th declines with rise of active parameters because of reduction in temperature gradient and highest impact belongs to Re. Although increasing revolution provides stronger secondary flow as well as trend of Re, the influence of N on Sgen,th is lower than that of Re. At lowest values of other factors, Be (Bejan number) declines about 0.016%, 0.004% and 8.2% with enhance of diameter ratio, N and Re. Revolution of tape has lowest impact on Be in comparison to other factors. Be decreases about 1.67% with rise of N at Re = 20000, D∗ = 0.045. The component of ∇T reduces as greater secondary vortex appears. So, augment of inlet velocity, width and revolution of tape makes exergy loss to decline.

中文翻译：

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包含纳米材料湍流状态的带有湍流器的太阳能集热器的性能

摘要 在目前的尝试中，将旋流发生器和四叶管安装在太阳能集热器中以实现更高的性能，不仅在冷却速度方面而且在可用能量方面。在输出中，针对不同的转数 (N)、泵功率（Re（雷诺数））和带材宽度（D*（直径比））说明了不可逆性分量。审查了四个职能：Xd（火用损失）；Sgen,th（热不可逆性）；Sgen,f（摩擦不可逆性）；Φ s（增强的不可逆性）。实验文章不仅用于验证纳米流体建模，还用于验证选择 k-ϵ 湍流模型的正确性。由于温度梯度降低，Sgen,th 随着活性参数的增加而下降，最大的影响属于 Re。虽然增加转数提供了更强的二次流动以及Re的趋势，但N对Sgen,th的影响小于Re。在其他因素的最低值下，随着直径比、N和Re的增加，Be（Bejan数）下降约0.016%、0.004%和8.2%。与其他因素相比，磁带的革命对Be的影响最小。在 Re = 20000，D∗ = 0.045 时，随着 N 的增加，Be 下降约 1.67%。∇T 的分量随着更大的次级涡的出现而减少。因此，进口速度、宽度和胶带转数的增加使火用损失下降。与其他因素相比，磁带的革命对Be的影响最小。在 Re = 20000，D∗ = 0.045 时，随着 N 的增加，Be 下降约 1.67%。∇T 的分量随着更大的次级涡的出现而减少。因此，进口速度、宽度和胶带转数的增加使火用损失下降。与其他因素相比，磁带的革命对Be的影响最小。在 Re = 20000，D∗ = 0.045 时，随着 N 的增加，Be 下降约 1.67%。∇T 的分量随着更大的次级涡的出现而减少。因此，进口速度、宽度和胶带转数的增加使火用损失下降。