Vapor Pressure Measurement of Two Quaternary Systems LiBr + LiNO3 + LiCl + H2O and LiBr + LiCl + 1,3-Propanediol + H2O

This research introduced two new absorption working pairs which have better energy storage performance than LiBr + H2O and lower cost than other working pairs in literature. The two working pairs are both quaternary systems: LiBr + LiNO3 + LiCl + H2O and LiBr + LiCl + 1,3-propanediol + H2O. Vapor pressures of the two quaternary systems were measured with the boiling point method at temperatures from (318.07 to 443.02) K and (324.78 to 419.40) K, respectively, with the both mass fractions of absorbent species from 0.40 to 0.65. The experimental data agree well with the calculated data from the Antoine-type equation. Compared with traditional working fluids of absorption cycle and ionic liquids, results show that the two quaternary systems studied in this work have lower vapor pressures, which will benefit energy release process in absorption energy storage/release systems.