This article describes the phase-change latent heat storage in an experiment device with inner longitudinal finned casing-pipe that is similar to the industrial ones, and discusses the influences of fluid velocity, inlet temperature and charging or discharging time on the charging and discharging process.

In order to conquer the shortages of traditional technologies of energy storage,such as low storage density,systematic complexity,limited storage time,a new energy storage technology named potential energy storage,based on the process of liquid dehumidifying and the ideology of energy transformation,is proposed.