Complex turbulator within an absorber tube of solar system with considering hybrid nanomaterial
Yinghong Qin
Abstract
A numerical technique based on finite volume was applied in the current work to scrutinize the irreversibility analysis and thermal behavior of the solar system. Such unit consists of absorber pipe including an external device for the improvement of rotational flow and augmenting effective surface. Moreover, the properties of testing fluid have been changed by adding hybrid nano-powders, and this technique has a promising impact on the irreversibility of the unit. Height of tape (b) and its revolution have been assumed as variables and various inlet velocities were applied in simulation. ANSYS FLUENT was applied to solve the equations, and the turbulent behavior of flow was analyzed according to the k-ε technique. Augmenting b makes exergy drop to decrease by about 5.81% while reducing revolution makes Xd augment to around 13.08%. Increasing revolution makes Sgen,th to decrease around 3.05% but Sgen,f increases around 126.61%. Considering the higher value of b leads to the decrement of Sgen,f around 54.02% while Sgen,th increases around 1.034%. Thermal irreversibility declines around 7.98% with an augment of inlet speed.