ENERGY STORAGE APPARATUS USING POWER GENERATION TURBINE AND COMPRESSED GAS BY PUMP

摘要

The present invention relates to an energy storage apparatus and, more specifically, to an energy storage apparatus using a power generation turbine by a high-pressure working fluid in a liquid state and a compressed gas in an enclosed space. The energy storage apparatus according to the present invention comprises: a first tank for storing a working fluid in a liquid state; a second tank for storing a gas and compressing or expanding the gas by the working fluid entering/exiting same; a working fluid supply channel having one end fastened to the lower end of the first tank and the other end fastened to the lower end of the second tank so as to supply the working fluid to the second tank; a working fluid return channel having one end fastened to the lower end of the first tank and the other end fastened to the lower end of the second tank so as to return the working fluid to the first tank; a storage pump provided on the working fluid supply channel, for supplying the working fluid stored in the first tank to the second tank, thereby generating stored energy in the form of a compressed gas; and a power generation turbine provided on the working fluid return channel and rotated by the pressure of the working fluid returned by the expansion of the gas inside the second tank, thereby generating electrical energy.