ABSTRACT
In this era, the need for energy is continuously increasing due to the fast advancements in the social economy and the growing world’s population. On the other hand, the consumption of fossil fuels, and their adverse effects on the environment are a matter of concern. Solar energy is considered the best alternative to conventional energy sources and can fulfil the energy demand. The thermal performance of solar energy conversion systems is highly dependent on the working fluid. The addition of appropriate nanoparticles in base fluids has become an efficient way to enhance the thermal performances of solar systems and it has been proved that nano-fluids offer extraordinary advantages over traditional working fluids. This chapter aims to summarize the recent advancements in the applications of mono and hybrid nano-fluids in improving the efficiency of different solar energy systems. Lastly, challenging issues associated with the use of nanofluids in solar systems and future perspectives have been discussed.
