Experimental Study on Characteristics of Nanofluid for Low-Temperature Phase Change Cool Storage

The TiO₂-BaCl₂-H₂O nanofluid with 1.13% volume fraction of TiO₂, which has the dimension of 20nm, was prepared by supersonic oscillator with hydrophilic dispersant. BaCl₂ solution and TiO₂-BaCl₂-H₂O nanofluid were tested by the experiments of freezing. The experimental results show that nanofluid has remarkably lower subcooling degree than BaCl₂ solution, and the cool storage capacity of the nanofluid is larger than that of BaCl₂ solution. Comparing with BaCl₂ solution, the heat transfer characteristic of the nanofluid is remarkably improved for the added nanoparticles.