Convective Heat Transfer Characteristics of NaHCO₃-Ag Nano Compound Material Solution

Abstract

Convection heat transfer enhancement is an important issue since this problem is of particular interest in the field of energy and environment. Ag nano-solution is expected not only to enhance heat transfer but also to work for deodorization and antifungal effect. An experimental investigation on the convective heat transfer characteristics for NaHCO₃-Ag nano-compound material solution in a long and straight heated pipe has been carried out. NaHCO₃ compound materials with 400 ppm or 1000 ppm Ag nano-particle solved in pure water are considered to study the effect of Ag nano-particle on the heat transfer enhancement. The concentration of NaHCO₃-Ag compound material in the water is varied 0.1 % to 1.0 %. The results indicate that the convective heat transfer coefficient is increased with an increase in the concentration of NaHCO₃-Ag compound solution. At a given concentration, heat transfer coefficient is increased as the content of the Ag nano-particle is increased. Heat transfer enhancement ratio correlation using NaHCO₃-Ag compound solution is also suggested.