World Journal of Engineering Research and Technology

*Abdulftah Aissa Khalil Salem and Mohammad Tariq

ABSTRACT

In today?s world refrigeration systems play a vital role to fulfill the human needs and a continuous research is being carried out by many researchers in order to improve the performance of these systems. Here, an attempt has been made to improve the performance of such system. Experimental investigation of vapor compression refrigeration system performance using Nano-refrigerant is presented in this work. Nano-refrigerant was prepared in current work by mixing of Al2O3 nanoparticles with Polyolester lubrication oil (POE) and added to the compressor of the refrigeration system to be mixed with pure refrigerant R404a during its circulation through refrigeration system. Three different concentrations of Al2O3 (0.02%, 0.04% and 0.06%) has been taken to mix with R404a refrigerant. Nanorefrigerant are used to study the performance of the deep freezer test rig and to investigate the effect of using Nano-refrigerant (Al2O3) as a working fluid compared with pure refrigerant R404a. The results showed that, the increasing in concentration of Al2O3 nanoparticles in the Nano-refrigerant will significantly enhance the performance of the refrigeration system, as adding nanoparticles will increase the thermal conductivity, heat transfer and improve the thermo-physical properties of Nano-refrigerant. Investigation of performance parameters for refrigeration system using Nano-refrigerant with 0.04% concentration compared with that for pure refrigerant R404a shows that, Nanorefrigerant has reflect higher performance in range of 50% increase in COP refrigeration system. It can be concluded that, Nano-refrigerants can be efficiently and economically feasible to be used in the vapor compression refrigeration systems.

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