Apparatus and method for generating electricity

An apparatus for capturing energy of a working mass including two or more immiscible liquids having different densities, the apparatus comprising:

• a working mass comprising at least two immiscible liquids having different densities, the at least two immiscible liquids comprising a predetermined proportion of oil and water;
• a supporting structure;
• a hermetically sealed vessel having an elongate shape housing the working mass wherein the working mass moves within the hermetically sealed vessel, wherein the water having a greater density than the oil tends to settle in a lower portion of the hermetically sealed vessel than the oil, which tends to keep the water in the lower portion as the working mass moves;
• and
• an electric generator driven by fluid flow housed within the hermetically sealed vessel and having an inlet and an outlet, the electric generator driven by fluid flow configured to produce electric power as the predetermined portion of oil and water passes into the inlet and out of the outlet in response to a movement of the hermetically sealed vessel.