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This study was motivated by the need to enhance the performance of parabolic trough collectors (PTCs) used in various industrial applications. The investigation aimed to explore the potential of using synthetic aromatic fluids with hybrid nanoparticles to achieve improved thermal efficiency and heat transfer in PTC systems. The combination of four industrial synthetic aromatic fluids, namely Syltherm 800, Therminol VP1, Therminol 66, and Dowtherm A, with hybrid nanoparticles consisting of Al 2 O 3  and TiO 2  with a combined volume concentration of 3% (50:50 ratio), was studied due to their widespread industrial application and potential for performance enhancement. The mathematical model is developed using Engineering Equation Solver (EES) and validated against results from Sandia National Laboratory (SNL), showing an average uncertainty of 0.1% for outlet temperature and 1.33% for thermal efficiency. The findings indicate that the hybrid nanofluid exhibits substantial enhancements in thermal efficiency compared to the base fluids. The enhancements are observed for Syltherm 800 (1.1%), Therminol VP1 (1.243%), Therminol 66 (1.04%), and Dowtherm A (0.2%). The heat transfer coefficient (HTC) increases by 206.35%, 156.63%, 220%, and 250% for Syltherm 800, Therminol VP1, Therminol 66, and Dowtherm A, respectively. In addition, enviroeconomic analysis and exergoenviroeconomic analysis are performed, revealing that the Therminol VP1-based nanofluid exhibits the lowest daily cost among the investigated fluids. The study’s findings highlight the potential of using synthetic aromatic fluids with hybrid nanoparticles to improve the performance of parabolic trough collectors.

Techno- thermo- economic- environmental assessment of parabolic trough collectors using hybrid nanofluids