Influence of nanoparticles on the effectiveness of heat exchanger and associated pressure drop

N.Seshaiah, C.V Subba Reddy

Heat exchanger is the essential device for almost all the industrial process heating and cooling equipment. Heat is transferred from one fluid to other by the mode of convection and conduction through the wall of the heat exchanger. Effectiveness of heat exchanger depends on the overall heat transfer coefficient. Heat transfer coefficient of pure water, Al₂O₃-water, CuO-water, and Fe₂O₃-water nanofluids has been studied. This paper addresses experimental results of the transient and turbulent region of forced convective heat transfer of water based nanofluids compared to that of distilled water. Four different concentrations of nanofluids in the range of 0.5% to 2% by mass have been prepared for Al₂O₃, CuO and Fe₂O₃. These nanofluids of different concentrations flows through counter flow heat exchanger. Different parameters affecting the heat transfer characteristics were studied and the influence of each parameter is noted. The overall heat transfer coefficient has been calculated with respect to associated pressure drop.