초록 ▼

An enclosed storage tank for a hot liquid comprising a metal shell with a flat metal bottom, a vertical cylindrical metal side wall and a metal roof; a vertical cylindrical internal wall, supported by the tank bottom, axially located in the tank to provide an annular space between the tank side wall

An enclosed storage tank for a hot liquid comprising a metal shell with a flat metal bottom, a vertical cylindrical metal side wall and a metal roof; a vertical cylindrical internal wall, supported by the tank bottom, axially located in the tank to provide an annular space between the tank side wall and the internal wall; openings to provide gravity flow of liquid between both sides of the internal wall; and the internal wall comprising a plurality of interconnected insulating blocks constituting thermal insulation surrounded by a covering layer impervious and corrosion resistant to hot liquid to be stored in the tank. A method of storing thermal energy as a hot liquid in the tank is also disclosed.

대표청구항 ▼

An enclosed liquid storage tank for storing a liquid at a temperature above 400°C. comprising: a metal shell with a flat metal bottom, a vertical cylindrical metal side wall and a metal roof; a vertical circular cylindrical essentially freestanding internal wall, supported by the tank bottom, axiall

An enclosed liquid storage tank for storing a liquid at a temperature above 400°C. comprising: a metal shell with a flat metal bottom, a vertical cylindrical metal side wall and a metal roof; a vertical circular cylindrical essentially freestanding internal wall, supported by the tank bottom, axially located in the tank to provide an annular space between the tank side wall and the internal wall; means to provide gravity flow of liquid between both sides of the internal wall; and the internal wall comprising a plurality of interconnected insulating blocks constituting thermal insulation surrounded by a covering layer impervious and corrosion resistant to liquid to be stored in the tank. A method comprising: feeding a hot liquid at a temperature above 400°C. into an enclosed liquid storage tank having a metal shell with a flat metal bottom, a vertical cylindrical internal wall, supported by the tank bottom, axially located in the tank to provide an annular space between the tank side wall and the internal wall; ports or openings in the internal wall along the flat metal bottom to provide gravity flow of liquid between both sides of the internal wall; and the internal wall comprising a plurality of interconnected insulating blocks constituting thermal insultion surrounded by a covering layer impervious and corrosion resistant to liquid to be stored in the tank, with said feeding continuing until the tank contains a layer of hot liquid within the internal wall and at least a layer of cold liquid in the annular space and along the flat metal bottom at least for the depth of the ports; removing hot liquid from the tank in a volume equal to cold liquid fed to the tank so that the total liquid volume in the tank is about constant and substantially fills the tank; and removing cold liquid from the tank in a volume equal to hot liquid fed to the tank until the layer of cold liquid at the bottom of the tank has a depth adequate for the thermocline to be above the ports so that thereby the hot liquid cannot flow from within the space surrounded by the internal wall, through the ports and into the annular space.