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Performance Analysis of a Refrigeration System Using Nano Fluid

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Performance Analysis of a Refrigeration System Using Nano Fluid ( performance-analysis-refrigeration-system-using-nano-fluid )

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International Journal of Advanced Mechanical Engineering. ISSN 2250-3234 Volume 4, Number 4 (2014), pp. 459-470 © Research India Publications http://www.ripublication.com/ijame.htm Performance Analysis of a Refrigeration System Using Nano Fluid T. Coumaressin1 and K. Palaniradja2 1Research Scholar, Pondicherry Engineering College, Pillai Chavadi, Kalapet, Puducherry, INDIA. 2Mechanical Department, Pondicherry Engineering College, Pillai Chavadi, Kalapet, Puducherry, INDIA. Abstract Evaporating heat transfer is very important in the refrigeration and air- conditioning systems. HFC 134a is the mostly widely used alternative refrigerant in refrigeration equipment such as domestic refrigerators and air conditioners. Though the global warming up potential of HFC134a is relatively high, it is affirmed that it is a long term alternative refrigerants in lots of countries. By addition of nanoparticles to the refrigerant results in improvements in the thermophysical properties and heat transfer characteristics of the refrigerant, thereby improving the performance of the refrigeration system. In this experiments the effect of using CuO-R134a in the vapour compression system on the evaporating heat transfer coefficient was investigated by CFD heat transfer analysis using the FLUENT software. An experimental apparatus was build according to the national standards of India. The experimental studies indicate that the refrigeration system with nanorefrigerant works normally. Heat transfer coefficients were evaluated using FLUENT for heat flux ranged from 10 to 40 kW/m2, using nano CuO concentrations ranged from 0.05 to 1% and particle size from 10 to 70 nm. The results indicate that evaporator heat transfer coefficient increases with the usage of nanoCuO. Keywords: Nanorefrigerant, CuO nanoparticles, Heat transfer coefficient, CFD.

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