Abstract:

In this paper，the flow boiling heat transfer characteristics of the TiO₂ nanoparticles and HFC134a mixtures were investigated in a horizontal tube with the nanoparticles concentration of 0.01 g•L^-1，0.025 g•L^-1，0.05 g•L^-1.The results indicated that nanoparticles increased the flow boiling heat transfer coefficient of the refrigerant，and the improvement was related to the nanoparticles concentration.The key factor may be the surface deposition characteristics.