Effects of MgO Nanoparticles on Thermo-Physical Properties of LiNO3-NaNO3-KNO3 for Thermal Energy Storage

Molten salt LiNO3-NaNO3-KNO3 has been investigated as heat transfer and thermal storage media for its low melting point good performance. In this paper, nanofluids were synthesized by dispersing MgO nanoparticles into LiNO3-NaNO3-KNO3, the effects of on properties studied with different sizes (20–100 nm) mass percent concentrations (0.5–2.0 wt.%). The addition had little effect temperature, led to a slight increase in enthalpy fusion 2.0–5.5%. Compared base salt, density nanofluid increased 0.22–1.15%. scanning electron microscope (SEM) test implied that nubby punctate microstructures responsible larger surface area interfacial energy, which could lead improvement specific capacity reaching 2.6–10.6%. characteristics remarkably nanoparticles, enhancement average diffusivity conductivity 1 wt.% nano-MgO be 5.3–11.7% 11.3–21.2%, respectively. Besides, viscosities slightly 3.3–8.1%. As conclusion, was positively influential salt.