​Parabolic Trough Solar Collectors: Thermal and Hydraulic Enhancement Using Passive Techniques and Nanofluids systematically and methodically examines all aspects of the essential and basic elements of parabolic trough solar collector (PTSC) design and performance enhancement techniques. The book provides thorough optical, thermal, and exergetic analyses along with a review of experimental and numerical studies performed on thermal augmentation methods, which includes the use of conventional fluids and advanced fluids such as nanofluids and hybrid nanofluids in PTSC. Moreover, the use of passive techniques, turbulators, and surface modifications with different shapes and configurations associated with PTSC is presented. The PTSC’s thermal efficiency augmentation estimation with the utilization of different fluids (i.e. conventional or advanced fluids) is summarized and analyzed in each case study, and the ongoing patterns in hybrid nanofluid utilization are provided.