# US 11,441,739 B2 · Emptying system for emptying a reservoir with a fluid control system for a valve for connecting the reservoir to a vent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,739 B2 - Document ID: US11441739B2 - Status: Granted - Kind: B2 - Application number: 16/634,871 - Filed: 2018-08-03 - Published: 2020-07-02 - Granted: 2022-09-13 - Earliest claimed: 2017-08-01 - Assignees: Areva Stockage D'Energie - Applicants: AREVA Stockage d'Energie - Inventors: André Rakotondrainibe; Franck Verbecke; Jean-Claude Reybaud - Web page: https://patentgrep.com/patent/US11441739B2 ## CPC - F17C 13/04: Arrangement or mounting of valves (valves per se F16K {; snap-coupling of nipples F16L37/00}) - F17C 7/00: Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass - F17C 13/12: Arrangements or mounting of devices for preventing or minimising the effect of explosion (flame traps A62C4/00 ){; Other safety measures} - F17C 2205/0332: Safety valves or pressure relief valves - F17C 2221/011: Oxygen - F17C 2221/012: Hydrogen - F17C 2223/0123: gaseous, e.g. CNG, GNC - F17C 2223/036: Very high pressure (>80 bar) - F17C 2225/0123: gaseous, e.g. CNG, GNC - F17C 2225/035: High pressure, i.e. between 10 and 80 bars - F17C 2225/036: Very high pressure, i.e. above 80 bars - F17C 2260/042: Reducing risk of explosion - Y02E 60/50: Fuel cells - F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An system for emptying at least one reservoir containing a pressurized fluid, including, for each reservoir, a vent for discharging the fluid out of the reservoir and a discharge valve for connecting the reservoir to the vent, the emptying system additionally including, for each discharge valve, a return member for returning the discharge valve to its closed configuration, and a fluid control system for controlling the movement of each discharge valve to its open configuration by action of an operating fluid on the discharge valve, the control system including an operating station arranged outside a danger zone around each reservoir, and, for each discharge valve, a fluid pipe fluidically connecting the operating station to the discharge valve, the operating station including at least one reversible free connection for connecting to each fluid pipe of a device for supplying the control system with operating fluid. ## Claims ### Claim 1 An energy storage system, comprising: a fluid storage device, comprising: at least one reservoir containing a pressurized fluid; and an emptying system for emptying said at least one reservoir, comprising: for each reservoir: a vent discharging fluid out of the reservoir; and a discharge valve connecting the reservoir to said vent, the discharge valve being movable between an open configuration, in which the discharge valve fluidly connects the at least one reservoir to said vent, and a closed configuration, in which the at least one reservoir and said vent are fluidly isolated from one another; a fluid control system controlling the movement of each discharge valve to the open configuration by action of an operating fluid on the discharge valve, comprising an operating station, arranged outside a danger zone around each reservoir, comprising at least one reversible free connection for connecting to one or more fluid pipes of a supply device for supplying the fluid control system with the operating fluid; and for each discharge valve: a return member returning the discharge valve to the closed configuration; and a fluid pipe fluidly connecting said operating station to the discharge valve; a device producing a first and a second secondary fluid by electrolysis of at least one primary fluid, wherein said fluid storage device stores the first and secondary fluids separately; and a fuel cell generating electrical energy by oxidation-reduction reaction between the first and second secondary fluids. ### Claim 2 (depends on 1) The energy storage system according to claim 1, wherein said fluid control system comprises a pneumatic control system, the operating fluid being formed by a pressurized gas. ### Claim 3 (depends on 1) The energy storage system according to claim 1, wherein said operating station comprises, for each fluid pipe, a control valve fluidly inserted between the free connection and the fluid pipe, the control valve being movable between an open configuration, in which the control valve fluidly connects the free connection to the fluid pipe, and a closed configuration, in which the free connection and the fluid pipe are fluidly isolated from one another by the control valve. ### Claim 4 (depends on 3) The energy storage system according to claim 3, wherein said control valve is manually controlled. ### Claim 5 (depends on 1) The energy storage system according to claim 1, comprising at least two reservoirs. ### Claim 6 (depends on 5) The energy storage system according to claim 5, wherein the fluid contained in a first of said reservoirs is dihydrogen and/or the fluid contained in a second of said reservoirs is dioxygen. ### Claim 7 (depends on 1) The energy storage system according to claim 1, wherein the first secondary fluid is dihydrogen. ### Claim 8 (depends on 1) A method for emptying a fluid storage device, comprising: providing an energy storage system according to claim 1; connecting a reversible free connection of the operating station of the emptying system of the energy storage system to an operating fluid supply device; establishing a fluid link between the supply device and the fluid pipe of a discharge valve of the emptying system, resulting in an increase in the pressure of the operating fluid in the fluid pipe; moving the discharge valve toward the open position under the effect of the pressure of the operating fluid in the fluid pipe; and discharging the fluid contained in the reservoir of the energy storage system to which the discharge valve is fluidly connected via the discharge valve and the vent of the reservoir.