LAUSR

Abstract In this research, numerical study of the effect of curved turbulators on the exergy efficiency of solar collector (SC) with two-phase hybrid nanofluid (TPHN) has been addressed. The MWCNT-TiO2-water hybrid nanofluid is modeled as two-phase, and the Eulerian-Eulerian model is used to model it. The numerical study has been performed for different concentrations, Reynolds numbers (Re), turbulator curvature angles, and lateral ratios with respect to the curved turbulator under turbulent flow regime. The k-epsilon turbulence model has been used to model the turbulent flow. Based on the results, an increase in both Re and φ increases the exergy efficiency at both turbulator curvatures. Furthermore, with an increase in the lateral ratio of the curved turbulators, the exergy efficiency decreases. For both turbulator curvatures, At a lateral ratio of 14 mm and φ = 3%, the exergy efficiency intensifies by 23.26% with an increase in Re from 4000 to 18000. On the other hand, the exergy efficiency falls with a rise in the lateral ratio. For instance, at a constant volume fraction of 3% and a Re = 18000, the exergy efficiency reduces by 18.87% with an increase in the lateral ratio from 14 mm to 20 mm.