Abstract

In A method of energy storage comprises receiving input energy (1) and using the input energy to compress (2) air or other process gas to produce a compressed process gas. The compressed process gas is stored (8). The compressed process gas is expanded (16) to generate output energy (17). Heat is transferred (5) from the process gas, before the process gas is stored (8) as a compressed process gas, to a hydrogen production process (10). The transferred heat is used in the hydrogen production process (10). The hydrogen may be stored (13) and subsequently used to heat to provide heat prior to, during, or after expanding (16) the compressed gas.

IPC Classes  ?

• F03D 9/18 - Combinations of wind motors with apparatus storing energy storing heat
• F02C 6/10 - Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
• H02J 15/00 - Systems for storing electric energy
• F01K 3/08 - Use of accumulators, the plant being specially adapted for a specific use
• F01K 3/02 - Use of accumulators and specific engine typesControl thereof

Abstract

A method of energy storage comprises receiving input energy (1) and using the input energy to compress (2) air or other process gas to produce a compressed process gas. The compressed process gas is stored (8). The compressed process gas is expanded (16) to generate output energy (17). Heat is transferred (5) from the process gas, before the process gas is stored (8) as a compressed process gas, to a hydrogen production process (10). The transferred heat is used in the hydrogen production process (10). The hydrogen may be stored (13) and subsequently used to heat to provide heat prior to, during, or after expanding (16) the compressed gas.

IPC Classes  ?

• F02C 6/10 - Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
• F02C 6/16 - Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air

Abstract

A method of energy storage comprises receiving input energy (1) and using the input energy to compress (2) air or other process gas to produce a compressed process gas. The compressed process gas is stored (8). The compressed process gas is expanded (16) to generate output energy (17). Heat is transferred (5) from the process gas, before the process gas is stored (8) as a compressed process gas, to a hydrogen production process (10). The transferred heat is used in the hydrogen production process (10). The hydrogen may be stored (13) and subsequently used to heat to provide heat prior to, during, or after expanding (16) the compressed gas.

IPC Classes  ?

• F02C 6/10 - Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
• F02C 6/16 - Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air

Abstract

Compressed Air Energy Storage System or Other System with Cold Storage An energy storage apparatus comprises a compressor arrangement configured to compress air or other process gas and to supply the compressed air or other process gas to a compressed gas store; an expander arrangement configured to expand the air or other process gas from the compressed gas store; a first heat transfer device associated with the expander arrangement; a thermal store including a thermal storage medium; and a second heat transfer device associated with the compressor arrangement. The first heat transfer device is configured to transfer heat to the air or other process gas which has passed through the expander arrangement from the thermal storage medium, the transfer producing a reduction in the thermal energy of the thermal storage medium in order to store cold in the thermal store. The second heat transfer device is configured to transfer heat between the thermal storage medium and the air or other process gas before the air or other process gas is stored in the compressed gas store, the transfer producing an increase of the thermal energy of the thermal storage medium. The thermal store is configured to store cold such that the temperature of the thermal storage medium in use is below ambient temperature. The thermal transfer fluid and/or the thermal storage medium may be a phase change material.

IPC Classes  ?

• F02C 1/02 - Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being an unheated pressurised gas
• F02C 1/05 - Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly characterised by the type or source of heat, e.g. using nuclear or solar energy
• F02C 6/16 - Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
• F17C 7/04 - Discharging liquefied gases with change of state, e.g. vaporisation
• F28D 20/02 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or using latent heat