INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND - Volume 6, Issue 8,, December 2017 (Special Issue)
Pages: 1185-1193
Date of Publication: 23-Dec-2017
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Determination of Thermophysical Properties of Nano Hybrid Refrigerants to be used in Commercial Refrigeration System
Author: UppadaVenkataRamana? YaravaUday Kumar?? A.S.B Prasanna??? Dr. C.V.Gopinath????
Category: Engineering, Science and Mathematics
Abstract:
In present scenario, the need of increased cooling rate in commercial applications of a Refrigeration system is high. However, the complications in power consumption and lesser COP are still challenges to the researchers. Further, environmental impacts of refrigerant is also need to be considered. Hence, suitable refrigerant with increased thermophysical properties is need to be identified for increasing the performance of commercial refrigeration system. From the literature, it is reported that the use of mixed refrigerants in refrigeration system can enhance cooling capacity. However, mixed refrigerants with nano particles are yet to be studied in commercial refrigeration applications. In this context, the thermophysical properties of nano hybrid refrigerants are investigated by using R-22 and R-12 with a mass fraction of 50% each by volume concentration of nano particle TiO2 from 1% to 5%. Different mathematical correlations which are developed in the past are used to determine the thermophysical properties of hybrid nano refrigerants. The thermo-physical properties of hybrid refrigerants such as Specific heat, Density, Thermal conductivity and Viscosity are determined by varying temperature from 300-350K with an temperature increment of 5K. From the results, it is observed that by nano particles dispersions in mixed refrigerants increased the thermo-physical properties. Hence, it is concluded that nano hybrid refr can enhance the cooling capacity of commercial refrigeration
Keywords: Nano Mixed Refrigerants, Thermophysical Properties, Vapour Compression Refrigeration System, Nano Particles, Volume Concentration.
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