Abstract
Application of Nano particles as additives in refrigerants has been identified as a way of enhancing the performance of the vapour compression refrigeration system (VCRS) without modifying the system components. When Nano particles are dispersed in a refrigerant or lubricant, they are regarded as Nano refrigerants or lubricants. The improvement in heat transfer and tribology are responsible for the enhancement of VCRS performance. In this review paper, the effect of Nano particles on the coefficient of performance, power consumption, thermal conductivity, viscosity and heat transfer of refrigerants are discussed. It is shown that the application of Nano particles as additives in refrigerant and lubricant in VCRS is favourable and promising. Therefore, Nano refrigerants are expected to be the future refrigerants to be adopted by VCRS manufacturers.
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