The heat transfer performance of thermal devices may be enhanced by active and passive techniques. One of the passive techniques is the mixing of nanoparticles to the common heat transfer fluids so that the thermal properties of the prepared solution will be enhanced as compared to the base fluid. Nanorefrigerants are a special type of nanofluids which are mixtures of nanoparticles and refrigerants and have a wide range of applications in various fields for example in refrigeration systems, air conditioning systems, and heat exchangers. This review is performed to explain the effect of nanorefrigerant properties on heat transfer and pressure drop compared to pure refrigerant.

Keywords : Nanorefrigerants, Base Fluid, Refrigeration System, Pressure Drop, Heat Transfer.