Heat Transfer Characteristics of Nano Suspension Type Latent Heat Transport Heat Transfer Fluid in Straight Pipe

Abstract

This study deals with an experimental investigation of heat transfer characteristics of nanosuspension as a heat medium. Nanosuspension is a fluid that uses nano-sized latent heat storage material having a melting point temperature higher than normal temperature as a dispersoid. Tetracosane (melting point 50.6 °C) is selected for the dispersoid as a latent heat storage material. A non-ion surfactant polioxyethylencetylether is used for the dispersion stability of the dispersoid in the distilled water that is a dispersion medium. The dispersoid composition ratio of the nanosuspension is measured in the range of 10 to 20 mass%. This paper shows the results on the condition that nanosuspension with nonNewtonian flows in a straight circular tube. The heat transfer coefficient was measured and evaluated in each temperature range of the liquid phase of dispersoid (>melting point) and the solid phase of dipersoid (<melting point).