Analytical and Experimental Investigations of Evaporator with R30-R160 Mixture

Abstract

Now a day’s refrigeration has become a basic need for the people all around the world. It’s been used for storing food to cryo-cooling the liquid H2 and liquid O2 used as rocket fuels. Domestic or industrial refrigeration of foods or public places are probably the most widely used application of refrigeration. So, Here a domestic and basic Vapor Compression Refrigeration Cycle is analyzed and experimented with mixture of refrigerants R30 & R160 hoping to get higher heat transfer rates without the expense of COP of the unit as individual refrigerants are not showing good results. The azeotropic mixture of R30 & R160 is made with R160 concentrations of 0%, 20%, 40%, 60%, 80% and 100% in R30 and it is used in a Refrigeration unit with different flow rates by fixing the other input parameters constant. Both the analytical heat transfer rates and experimental heat transfer rates at different flow rates are found out and noted. The values are compared to get a clear picture of the heat transfer rates at different flow rates. In this thesis the analysis and experiment it is known that higher flow rates of the refrigerant mixture increases the heat transfer rates but in the expense of higher work consumption which will affect the coefficient of performance of the refrigerant unit which is not advisable to use since the work utilization of the good refrigeration unit should be lesser for unit of refrigeration. CFD analysis to determine the heat transfer coefficient, mass flow rate, heat transfer rate, pressure drop and velocity at different mass flow rates (1, 1.5 &2kg/min) and they are compared with the experimental results for proposing an appropriate mixture of refrigerant blend at best flow rate.