Abstract
The impact of a twisted turbulator in a parabolic solar collector on the improvement of thermal-hydraulic performance (THP), as well as energy and exergy Efficiency of MgO-Cu/water hybrid nanofluid (HNF) is numerically evaluated. The main goal of this study is to use a twisted turbulator with pitch ratios (gamma) of 1, 1.5, 2, and 2.5 for Reynolds numbers (Re) of 8000 to 32,000 and volume fractions (phi) of 1, 2, and 3% of MgO and Cu nanoparticles. Numerical simulation findings are reported in the form of graphs of average Nusselt number (Nu(ave)), pressure drop (Delta p), THP, energy Efficiency (eta(c)), and exergy Efficiency (eta(ex)). It can be concluded that Nu(ave) and Delta p depends on (I) and Re and augments linearly with their values. Moreover, Nu(ave) and Delta p increases significantly by increasing the pitch ratio of the turbulator. The results revealed that the maximum values of augmentation of eta(c) and eta(ex) are respectively 23.79% and 21.15% by raising Re from 8000 to 32000. In a SC with a turbulator with gamma = 2 and phi = 3%, eta(c) is raised by 24.16% by increasing Re from 8000 to 32000; while, in the case of gamma = 2.5 and phi = 3%, eta(c) is enhanced by 18.2%.