| 摘要 |
<p>The present invention relates to an energy storage device, and more specifically, to an energy storage device using a turbine by compressed gas in a closed space and liquefied high-pressure working fluid. According to the present invention, an energy storage device includes a first tank storing liquefied working fluid; a second tank storing gas, and compressing or expanding the gas by the working fluid; 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 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 to return the working fluid to the first tank; a storage pump provided on the working fluid supply channel, and supplying the working fluid stored in the first tank to the second tank to form gaseous stored energy; and a turbine provided on the working fluid return channel, and being rotated by pressure of the working fluid returned by expansion of the gas inside the second tank to generate electrical energy.</p> |
