Experimental Enhancement of the Steam Quality Using Water Based Nanofluid (Al2o3)

Abstract By the expansion process in a throttle valve, the heat transfer at the solid-fluid interface affects the thermal state of the fluid (steam) passing through it. In this expansion process, the steam loses the heat and converts to water vapor by the addition of the moisture content. Here, the quality of the steam is important at the point of next to expansion. The quality of the steam is increased by adding the nanoparticles. Since nanofluids are shown the capability of transmitting heat more than the conventional fluids which could be useful in many applications, the experimental analysis is done to determine the dryness fraction of the steam using water-based nanofluid Al2O3 with different concentrations 0.1%, 0.2% and 0.3% in separating throttling calorimeter. Numerical calculation for enhancing the heat carrying capacity in the expansion process through the throttling is done by considering the steady and turbulent k-ε model with a constant Reynolds number for the different concentrations of nano-fluids. The dryness fraction is 0.96 for water-based nanofluid Al2O3 with 0.3% concentration as compared with water of 0.83 dries. Key Words: Throttling, Nanoparticles, Dryness fraction, Steam