Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
NZ779631B2 - Energy storage plant and process - Google Patents
[go: Go Back, main page]

NZ779631B2 - Energy storage plant and process - Google Patents

Energy storage plant and process Download PDF

Info

Publication number
NZ779631B2
NZ779631B2 NZ779631A NZ77963119A NZ779631B2 NZ 779631 B2 NZ779631 B2 NZ 779631B2 NZ 779631 A NZ779631 A NZ 779631A NZ 77963119 A NZ77963119 A NZ 77963119A NZ 779631 B2 NZ779631 B2 NZ 779631B2
Authority
NZ
New Zealand
Prior art keywords
working fluid
heat exchanger
tank
casing
turbine
Prior art date
Application number
NZ779631A
Other versions
NZ779631A (en
Inventor
Claudio Spadacini
Original Assignee
Energy Dome Spa
Filing date
Publication date
Priority claimed from IT102019000002385A external-priority patent/IT201900002385A1/en
Application filed by Energy Dome Spa filed Critical Energy Dome Spa
Publication of NZ779631A publication Critical patent/NZ779631A/en
Publication of NZ779631B2 publication Critical patent/NZ779631B2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F01K25/103—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/006—Accumulators and steam compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/02—Use of accumulators and specific engine types; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F01K3/185—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters using waste heat from outside the plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C1/00—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid
    • F02C1/04—Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid the working fluid being heated indirectly
    • F02C1/10—Closed cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00—Devices for producing mechanical power from solar energy
    • F03G6/0055—Devices for producing mechanical power from solar energy having other power cycles, e.g. Stirling or transcritical, supercritical cycles; combined with other power sources, e.g. wind, gas or nuclear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/40—Flow geometry or direction
    • F05D2210/44—Flow geometry or direction bidirectional, i.e. in opposite, alternating directions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in networks by storage of energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

energy storage plant (1) comprises a casing (5) for the storage of a working fluid other than atmospheric air, in a gaseous phase and in equilibrium of pressure with the atmosphere; a tank (9) for the storage of said working fluid in a liquid or supercritical phase with a temperature close to the critical temperature; wherein said critical temperature is close to the ambient temperature. The plant (1) is configured to carry out a closed thermodynamic cyclic transformation (TTC), first in one direction in a charge configuration and then in the opposite direction in a discharge configuration, between said casing (5) and said tank (9); wherein in the charge configuration the plant (1) stores heat and pressure and in the discharge configuration generates energy.

Claims (15)

1. Energy storage plant, comprising: a working fluid other than atmospheric air and having a critical temperature 5 between 0°C and 100°C; a casing (5) for the storage of the working fluid, in a gaseous phase; a tank (9) for the storage of said working fluid in liquid or supercritical phase with a temperature close to the critical temperature; wherein the plant is configured to perform a closed cyclic thermodynamic 10 transformation (TTC), first in one direction in a charge configuration and then in an opposite direction in a discharge configuration, between said casing (5) and said tank (9); wherein in the charge configuration the plant stores heat and pressure and in the discharge configuration generates energy; wherein said casing (5) is deformable and is a pressure balloon or has the 15 structure of a gasometer so that the working fluid in said casing (5) is an equilibrium of pressure with the atmosphere with low or no overpressure.
2. Plant according to claim 1, wherein the working fluid is chosen in the group including: CO2, SF6, N2O.
3. Plant according to claim 1 or 2, comprising: 20 - a compressor (3) and a motor mechanically connected to each other; - a turbine (2) and a generator mechanically connected to each other; - said casing (5) externally in contact with the atmosphere and delimiting inside a volume configured to contain the working fluid at atmospheric pressure or substantially atmospheric pressure, wherein said volume is 25 selectively in fluid communication with an inlet (3a) of the compressor (3) or with an outlet (2b) of the turbine (2),; - a primary heat exchanger (7) selectively in fluid communication with an outlet (3b) of the compressor (3) or with an inlet (2a) of the turbine (2); - said tank (9) in fluid communication with the primary heat exchanger (7) 30 to accumulate the working fluid; - a secondary heat exchanger (10) operationally active between the primary heat exchanger (7) and the tank (9) or in said tank (9); said plant being configured to operate in the charge configuration or in the discharge configuration; ENE3P1WO wherein, in the charge configuration, the casing (5) is in fluid communication with the inlet (3a) of the compressor (3) and the primary heat exchanger (7) is in fluid communication with the outlet (3b) of the compressor (3), the turbine (2) is at rest, the motor is operating and drives the compressor (3) to compress the working fluid 5 coming from the casing (5), the primary heat exchanger (7) works as a cooler to remove heat from the compressed working fluid, cool it and store thermal energy, the secondary heat exchanger (10) works as a cooler to remove additional heat from the compressed working fluid and store additional thermal energy, the tank (9) receives and stores the compressed and cooled working fluid, wherein the working 10 fluid stored in the tank (9) has a temperature close to its own critical temperature; wherein, in the discharge configuration, the casing (5) is in fluid communication with the outlet (2b) of the turbine (2) and the primary heat exchanger (7) is in fluid communication with the inlet (2a) of the turbine (2), the compressor (3) is at rest, the secondary heat exchanger (10) works as a heater to release heat to the working 15 fluid coming from the tank (9), the primary heat exchanger (7) works as a heater to release further heat to the working fluid and heat it, the turbine (2) is rotated by the heated working fluid and drives the generator generating energy, the working fluid returns in the casing (5) to atmospheric or substantially atmospheric pressure.
4. Plant according to claim 3, comprising an additional heat exchanger (13) 20 operationally placed between the casing (5) and the compressor (3) and between the casing (5) and the turbine (2) to pre-heat the working fluid before compression in the compressor (3), in the charge configuration, or to cool the working fluid from the turbine (2), in the discharge configuration.
5. Plant according to one of the above claims 3 or 4, wherein the motor and the 25 generator are separate elements; or wherein the motor and the generator are defined by a single motor-generator (4) and the plant comprises connection devices between said motor-generator (4) and the compressor (3) and the turbine (2) to connect mechanically and alternately the motor-generator (4) to the compressor (3) or to the turbine (2). 30 6. Plant according to one of the above claims 3, 4 or 5, wherein the secondary heat exchanger (10) and the primary heat exchanger (7) are configured to operate a super-critical transformation of the working fluid so that said working fluid is accumulated in the tank (9) in super-critical phase; wherein optionally the secondary
6. ENE3P1WO heat exchanger (10) is placed between the primary heat exchanger (7) and said tank (9).
7. Plant according to the previous claim, wherein the tank (9) comprises a separating membrane (31) configured to internally separate the tank (9) into a first 5 chamber with variable volume (32) for the working fluid in super-critical phase and into a second chamber with variable volume (33) in fluid communication with a compensation circuit (34) containing a non-compressible fluid, optionally water.
8. Plant according to one of the above claims from 3 to 5, wherein the secondary heat exchanger (10) and the primary heat exchanger (7) are configured to operate 10 a sub-critical transformation of the working fluid so that the working fluid is accumulated in the tank (9) in liquid phase; wherein optionally the secondary heat exchanger (10) is integrated in the tank (9).
9. Plant according to one of the above claims 3 to 8, wherein the primary heat exchanger (7) is a fixed or moving bed heat regenerator or comprises a water, oil or 15 salt primary circuit (15) with at least one primary storage chamber (17, 18).
10. Plant according to one of the above claims from 3 to 9, wherein the secondary heat exchanger (10) comprises a secondary air or water circuit (20) with at least one secondary storage chamber (21, 22) and is configured to remove heat from the working fluid, in the charge configuration, or to transfer heat to the working fluid, in 20 the discharge configuration, at a temperature below 100°C, optionally between 0°C and 50°C, optionally at a temperature close to the ambient temperature.
11. Process for energy storage, comprising: carrying out a closed thermodynamic cyclic transformation (TTC), first in one direction in a charge configuration/phase and then in an opposite direction in a 25 discharge configuration/phase, between a casing (5) for the storage of a working fluid different from atmospheric air and having a critical temperature between 0°C and 100°C, in a gaseous phase, and a tank (9) for the storage of said working fluid in a liquid or supercritical phase with a temperature close to the critical temperature; wherein, in the charge phase, the process accumulates heat and 30 pressure and, in the discharge phase, generates energy; wherein said casing (5) is deformable and is a pressure balloon or has the structure of a gasometer so that the working fluid in said casing (5) is in equilibrium of pressure with the atmosphere with low or no overpressure.
12. Process according to claim 11, wherein the charge phase comprises: ENE3P1WO - compressing said working fluid, coming from said casing (5) externally in contact with the atmosphere and delimiting inside a volume configured to contain the working fluid at atmospheric pressure or substantially atmospheric, absorbing energy; 5 - injecting the compressed working fluid through a primary heat exchanger (7) and a secondary heat exchanger (10) placed in series to bring a temperature of the working fluid close to its own critical temperature; wherein the primary heat exchanger (7) works as a cooler to remove heat from the compressed working fluid, cool it and store thermal energy, 10 wherein the secondary heat exchanger (10) works as a cooler to remove further heat from the compressed working fluid and store further thermal energy; - accumulating the cooled working fluid in said tank (9); wherein the secondary heat exchanger (10) and the primary heat exchanger (7) carry 15 out a super-critical transformation of the working fluid so that said working fluid is accumulated in the tank (9) in super-critical phase or wherein the secondary heat exchanger (10) and the primary heat exchanger (7) carry out a sub-critical transformation of the working fluid so that said working fluid is accumulated in the tank (9) in liquid phase; wherein optionally a 20 temperature of the working fluid accumulated in the tank (9) is between 0 °C and 100 °C and wherein a pressure of the working fluid accumulated in the tank (9) is between 10 bar and 150 bar.
13. Process according to claim 11 or 12, wherein said working fluid is chosen in the group including: CO2, SF6, N2O. 25
14. Process according to claim 12 or 13, wherein the phase of discharge and generation of energy comprises: - passing the working fluid from the tank (9) through the secondary heat exchanger (10) and the primary heat exchanger (7); wherein the secondary heat exchanger (10) works as a heater to transfer heat to the 30 working fluid coming from the tank (9), wherein the primary heat exchanger (7) works as a heater to transfer further heat to the working fluid and heat it; - passing the heated working fluid through a turbine (2), wherein the turbine (2) is rotated by the heated working fluid and drives the generator ENE3P1WO generating energy, wherein the working fluid expands and cools down in the turbine (2); - re-injecting the working fluid coming from the turbine (2) into the casing (5) at atmospheric or substantially atmospheric pressure. 5
15. Process according to claim 14, wherein in the discharge phase and energy generation, between the primary heat exchanger (7) and the turbine (2), it is provided to further heat the working fluid through an additional heat source (230), optionally chosen from: a solar source, industrial waste heat recovery, exhaust heat of gas turbines.
NZ779631A 2019-12-17 Energy storage plant and process NZ779631B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000002385A IT201900002385A1 (en) 2019-02-19 2019-02-19 Plant and process for the accumulation of energy
PCT/IB2019/060896 WO2020039416A2 (en) 2019-02-19 2019-12-17 Energy storage plant and process

Publications (2)

Publication Number Publication Date
NZ779631A NZ779631A (en) 2024-10-25
NZ779631B2 true NZ779631B2 (en) 2025-01-28

Family

ID=

Similar Documents

Publication Publication Date Title
FI3927949T3 (en) ENERGY STORAGE PLANT AND PROCESS
IL295366B1 (en) Plant and process for energy generation and storage
JP7169305B2 (en) Staged Regenerative Supercritical Compressed Air Energy Storage System and Method
KR102384815B1 (en) Device and method for temporarily storing gas and heat
AU2015327243A1 (en) Device and method for storing energy
JP7658622B2 (en) Rankine cycle system and Rankine cycle method
WO2023249505A4 (en) New process for isothermal compression and expansion of gases and some devices for its application
NZ779631B2 (en) Energy storage plant and process
EP2638252B1 (en) Method for converting thermal power, delivered from a variable temperature heat source, into mechanical power
US9790816B1 (en) Systems and methods of converting heat to electrical power
NZ792535B2 (en) Plant and process for energy generation and storage
CN117469005A (en) Low-temperature medium energy storage system and energy storage method
CN223869880U (en) An energy storage system
ES2891374B2 (en) SYSTEM AND PROCEDURE TO UNCOUPLE THE CONSUMPTION AND PRODUCTION OF MECHANICAL ENERGY IN THERMODYNAMIC CYCLES OF POWER
US12486790B2 (en) Intermediate pressure supercritical CO2 power cycle
AU2013101741A4 (en) Heat Engine System
CN113217133A (en) Method for improving heat efficiency of steam engine by cyclic working
CN119713951A (en) Energy storage system and energy storage method
IT202000002731A1 (en) Liquid gas system for the production of electrical energy from thermal energy at room temperature.
CN118273815A (en) Power generation system and power generation method based on heat pipe stack
PL241439B1 (en) System and method for energy storage in compressed carbon dioxide and hydrogen
OA20837A (en) Energy storage plant process
Khristenko The feasibility of using organic liquids heated in nuclear reactors as working fluids in turbines, from the thermodynamical standpoint