Energy storage vessel, systems, and methods

A vessel comprising a bottom wall joined to a surrounding side wall, and a liner disposed within the bottom wall and side wall, the liner comprising:

• a) a liner bottom comprised of means for expanding radially outwardly when heated and contracting radially inwardly when cooled;
• and
• b) a liner side wall joined to the inner liner bottom and comprised of means for expanding radially outwardly when heated and contracting radially inwardly when cooled.

15-16. (canceled)

An expandable liner for a vessel, the expandable liner comprising:

• a) a liner bottom comprising a central plate surrounded by an array of radially arranged sector-shaped plates, each of the sector-shaped plates joined at a radial portion of its perimeter to a radial portion of the perimeter of an adjacent sector-shaped plate by a radial flexible joint and joined at an inner portion of its perimeter to the central plate by an inner flexible joint;
• and
• b) a liner side wall joined to the liner bottom and comprising a plurality of panels, each of the panels joined at a lateral portion of its perimeter to a lateral portion of the perimeter of an adjacent panel by a lateral flexible joint.

25-45. (canceled)