Heat Transfer Charactericstic Of A Condenser With AI203 Refrigerant Based Nanofluids As Working Fluid

Nicholas Lian, Ak Mujah (2012) Heat Transfer Charactericstic Of A Condenser With AI203 Refrigerant Based Nanofluids As Working Fluid. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Refrigeration systems have become very important in various applications. Almost all buildings and houses in Malaysia have the air conditioning system regarding the hot temperature in this country. However, the use of the air conditioners consumes a lot of electricity. Scientist and researchers are trying to find a new kind of working fluid that can enhance the thermal conductivity and the pressure drop of the conventional base fluid, thus increasing the heat transfer rate and the energy consumption could be reduced. By introducing a base fluid suspended with nanoparticles which have been developed in recent years, this might happen. In this project, the effect of the suspended nanoparticles, Al2O3, in the base fluid; conventional refrigerant, Tetraflurocarbons, R-134a, called as nanorefrigerant, is being investigated through mathematical modeling to investigate the thermal conductivity, pressure drop and heat transfer of nanorefrigerant with different volume fraction of nanoparticles from 0.2% - 1.0%. CFD simulation is needed in this project to verify the results of mathematical modeling. Based on the calculation, the percentage of thermal conductivity improvement of nanorefrigerant as compared to conventional refrigerant is 1256.125% and 16 – 48% enhancement with 0.2% to 1.0% volume fraction of nanoparticles. Meanwhile the pressure drop showed the enhancement about 61.8% and heat transfer enhancement is about 2.09%. The results of mathematical modeling are higher as compared to simulations result. These showed that with additive of nanoparticles, the properties of conventional refrigerant can be improve

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