# US 10,480,409 B2 · Compressed air energy storage and recovery system and method with constant volume heating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,409 B2 - Document ID: US10480409B2 - Status: Granted - Kind: B2 - Application number: 15/566,614 - Filed: 2016-04-12 - Published: 2018-04-05 - Granted: 2019-11-19 - Earliest claimed: 2015-04-13 - Assignees: Ifp Energies Nouvelles - Applicants: IFP Energies nouvelles - Inventors: David Teixeira - Web page: https://patentgrep.com/patent/US10480409B2 ## CPC - F02C 6/16: for storing compressed air - F01D 25/10: Heating, e.g. warming-up before starting - F02C 1/04: the working fluid being heated indirectly {(in a fluidised-bed combustor F02C3/205)} - F02C 1/05: characterised by the type or source of heat, e.g. using nuclear or solar energy - F03D 9/17: storing energy in pressurised fluids - F05D 2240/40: Use of a multiplicity of similar components - F05D 2260/42: Storage of energy - Y02E 10/72: Wind turbines with rotation axis in wind direction - Y02E 60/16: Mechanical energy storage, e.g. flywheels or pressurised fluids - Y02E 70/30: Systems combining energy storage with energy generation of non-fossil origin - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F03D: WIND MOTORS - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The invention is a compressed gas energy storage and recovery system and method, of AACAES type. The system and the method according to the invention heats at constant volume stored compressed gas to increase the pressure of the stored compressed gas. ## Claims ### Claim 1 A compressed gas energy storage and recovery system comprising: at least one compressor for compressing the gas, a storage providing constant volume storage of the compressed gas, a first heat exchanger located outside the storage for cooling the compressed gas with a heat transfer fluid which absorbs heat from the compressed gas, a heater for heating the stored compressed gas at constant volume; and at least one expansion device for expanding the compressed gas after heating for generating energy, and wherein the heater for heating the compressed gas at constant volume is located in the storage and the heating of the stored compressed gas in the storage is at least partially performed by heat transfer between heat transfer fluid and the compressed gas and the heater for heating the stored compressed gas comprises a second heat exchanger exchanging heat between the stored compressed gas and the heat transfer fluid of the first heat exchanger. ### Claim 2 (depends on 1) The system as claimed in claim 1, wherein the storage for the compressed gas comprises at least one cylindrical reservoir comprising at least one of an inner and an outer cylinder in which the heat transfer fluid circulates. ### Claim 3 (depends on 1) The system as claimed in claim 1, wherein the heat exchanger for the compressed gas comprises stages with each stage storing at least the heat transfer fluid at a different temperature than a storage temperature of that heat transfer fluid in remaining stages, for heating the compressed gas successively with the heat transfer fluid stored at different temperatures. ### Claim 4 (depends on 1) The system as claimed in claim 1, wherein the constant volume heater comprises a heat exchanger having an external heat source. ### Claim 5 (depends on 1) The system as claimed in claim 1, wherein the compressed gas storage includes storage volumes which are connected together. ### Claim 6 (depends on 1) The system as claimed in claim 1, wherein the expansion device is reversible and when reversed is used as a compressor. ### Claim 7 (depends on 1) The system as claimed in claim 1, comprising compressors between which are disposed a heat exchanger and expansion devices between which is disposed a heat exchanger. ### Claim 8 (depends on 1) The system as claimed in claim 1, the first heat exchanger operates at constant pressure. ### Claim 9 A compressed gas energy storage and recovery method comprising: a) compressing gas; b) cooling the compressed gas by heat exchange with a heat transfer fluid to produce heated heat transfer fluid; c) storing the cooled compressed gas in a constant volume gas storage; d) heating the stored compressed gas in the storage at constant volume with the heating being performed at least partially by heat exchange between the heated heat transfer fluid and the compressed gas stored at constant volume; and e) expanding the compressed gas heated with the heat transfer fluid to generate energy. ### Claim 10 (depends on 9) The method as claimed in claim 9, wherein the heating of the gas at constant volume includes circulating the transfer fluid in a cylindrical compressed gas storage reservoir. ### Claim 11 (depends on 9) The method as claimed in claim 9, comprising heating the gas at constant volume with an external heat source. ### Claim 12 (depends on 9) The method as claimed in claim 9, wherein the compressing and the cooling of the gas is repeated in compressors and heat exchangers with the heat transfer fluid and the expanding being repeated by expansion devices and heat exchangers with the heated transfer fluid. ### Claim 13 (depends on 9) The method as claimed in claim 9 comprising storing the heated transfer fluid. ### Claim 14 (depends on 9) The method as claimed in claim 9, comprising cooling the compressed gas in stages by storing the heated transfer fluid at different temperatures in each stage and the constant volume heating is performed by successive heat exchangers with the heat transfer fluid at different temperatures.