In a lithium bromide absorption-type accumulator system

allowing the solution to crystallize greatly improves the system storage density. However

the crystals seriously affect the discharge process of the energy-storage system. To rapidly dissolve the crystals

a flat-membrane framed accumulator was designed to address this difficulty. The heat-transfer and mass-transfer performance in the accumulator will directly affect the energy-discharge rate of the accumulator. Therefore

a test rig was built to test the heat- and mass-transfer performance in the membrane accumulator. Using experimental data

the heat- and mass-transfer characteristics of the membrane accumulator under different working conditions were analyzed

as well as the influence of the water-vapor cross-sectional area on the heat-and mass-transfer performance. The experimental results show that the crystals in the lithium-bromide solution with an initial mass fraction of 65% can be completely dissolved in 60 min. The feasibility of the flat-membrane framed accumulator is confirmed by this experiment.