CN202811078U - Ultra-supercritical air energy storage/release system - Google Patents

Abstract

The utility model discloses an ultra-supercritical air energy storage/release system, which is a new type of large-scale energy storage system, which relates to energy storage technology, that is, the air is compressed to an ultra-supercritical state ( Simultaneously store the heat of compression), use the expander to cool the air while recovering the expansion work to improve efficiency, and use the stored cold energy to cool, liquefy and store the ultra-supercritical air (energy storage); at the peak of power consumption, the liquid air is heated Compression, heat absorption to an ultra-supercritical state (while recovering cold energy), and after further absorption of compression heat, a turbine drives a generator to generate electricity (energy release). The system of the utility model has high energy density, high efficiency, is not limited by the energy storage period and geographical conditions, is suitable for various power stations (including wind energy and other renewable energy power stations), is environmentally friendly, and can recycle medium and low temperature (calorific value) Advantages such as waste heat.

Description

Ultra-supercritical air energy storage/energy release system

technical field

The utility model relates to the technical field of energy storage, in particular to a large-scale air energy storage/energy release system based on an ultra-supercritical process. the

Background technique

Power energy storage technology is currently an important means to adjust the peak and valley of the power grid and improve the economy and stability of the power system. It is one of the most important bottlenecks restricting the large-scale utilization of unstable and intermittent renewable energy. The key technology of power grid. At present, the existing electric energy storage technologies include pumped storage power stations, compressed air, storage batteries, superconducting magnetic energy, flywheels and capacitors. However, due to capacity, energy storage period, energy density, charge and discharge efficiency, lifespan, operating costs, environmental protection and other reasons, only pumped hydropower stations and compressed air have been used in large-scale commercial systems. the

The traditional compressed air energy storage system is an energy storage system developed based on gas turbine technology. During the low electricity consumption, the air is compressed and stored in the gas storage chamber, so that the electric energy is converted into the internal energy of the air and stored; at the peak power consumption, the high-pressure air is released from the gas storage chamber, enters the combustion chamber of the gas turbine and burns together with the fuel, and then drives Turbine power generation. The compressed air energy storage system has the advantages of large energy storage capacity, long energy storage period, high efficiency (50% to 70%) and relatively small unit investment. However, the traditional compressed air energy storage system is not an independent technology. It must be used in conjunction with gas turbine power plants, and cannot be suitable for other types, such as coal-fired power plants, nuclear power plants, wind and solar power plants, and is especially not suitable for my country's energy strategy that focuses on coal-fired power generation and does not advocate gas-fired power generation. Moreover, the compressed air energy storage system still relies on the combustion of fossil fuels to provide heat sources. On the one hand, it faces the threat of the gradual depletion of fossil fuels and rising prices; Zero emissions), renewable energy development requirements. What's more fatal is that due to the low energy storage density, the compressed air energy storage system also requires specific geographical conditions to build large gas storage chambers, such as rock caves, salt caverns, abandoned mines, etc., which greatly limits the use of compressed air energy storage systems. application range. the

In order to solve the main problems faced by traditional compressed air energy storage systems, especially the dependence on gas turbines, scholars at home and abroad have developed ground compressed air energy storage systems (SVCAES), compressed air energy storage systems with heat recovery ( AACAES), air-steam combined cycle compressed air energy storage system (CASH), etc., so that the compressed air energy storage system can basically be separated from the fossil fuel combustion heat source. However, since no fossil fuel heat source is used, the energy density of the compressed air energy storage system is lower, which further highlights the dependence on large gas storage chambers, and the efficiency is not high enough. A reasonable solution must be found to make the air energy storage system more efficient. widely and effectively. the

In recent years, scholars at home and abroad have developed supercritical air energy storage systems, which use the properties of air under supercritical conditions to solve the main technical bottlenecks in traditional compressed air energy storage. the

The utility model proposes an ultra-supercritical air energy storage system, which further improves the performance of the supercritical air energy storage system. the

Contents of the invention

The purpose of this utility model is to disclose an ultra-supercritical air energy storage/energy release system, which is a new type of air energy storage system, which utilizes the properties of air in the ultra-supercritical state and the innovation of the system process to improve the performance of the supercritical air energy storage system , suitable for supporting use of various types of power stations and grid energy storage. the

In order to achieve the above object, the technical solution of the utility model is:

An ultra-supercritical air energy storage/energy release system, including a compressor unit, a heat storage/heat exchanger, a cold storage/heat exchanger, a cryogenic storage tank, a valve, a cryogenic pump, a turbine unit, a generator, and a drive unit. It is characterized in that: the system also includes an expansion unit, after the compressor unit compresses the air to an ultra-supercritical state, the temperature and pressure of the ultra-supercritical air is reduced to a liquid state through the expansion unit or the combination of the expansion unit and a throttle valve, Liquid air is stored into the cryogenic storage tank. the

The significant difference between it and the supercritical compressed air energy storage system is that the parameters are higher, and the pressure reaches 50-420bar. At the same time, the throttle valve is replaced by an expander or a combination of an expander and a throttle valve, which greatly improves the energy density and efficiency of the system. promote. the

The compressor unit of the utility model includes at least one low-pressure compressor and at least one high-pressure compressor, which are connected in series or integrated into a whole multi-stage compressor. The inlet of each low-pressure compressor is connected to an air source, and the compression system is connected in series with at least one expansion compressor The expansion machine can reduce the gas temperature and improve the system efficiency. The outlet of the expander is connected to the throttle valve to cool down slightly to realize liquefaction. The expander can be piston type, centrifugal type, axial flow type and combined type. The type and number of expanders depend on Depending on the system parameters; the expander and compressor can be designed as a coaxial combination, or can be connected through a gearbox to provide compression power, thereby improving system efficiency and economy. The system layout is as follows:

The low-pressure compressor and the high-pressure compressor are respectively connected to the heat storage/heat exchanger through the pipeline; the high-pressure air after storing the compression heat enters the cold storage heat exchanger through the pipeline to cool down, and then enters the expander for further cooling and decompression liquefaction, and then enters the low temperature through the pipeline The storage tank is equipped with a valve and at least one cryopump in the pipeline, and the valve is located upstream of the cryopump; the bottom of the cold storage/heat exchanger is provided with a slag discharge pipeline and an exhaust pipeline; the heat storage/heat exchanger is respectively connected to the high-pressure The turbine and the low-pressure turbine are connected. the

Its working process is: when storing energy, use the driving unit to drive the combined compressor unit to compress a certain amount of air to an ultra-supercritical state, and the compression heat of each stage is recovered and stored in the heat storage/heat exchanger; Parameter ultra-supercritical air enters the cold storage/heat exchanger for cooling, and then expands and cools down through the expansion unit to transform into liquid air and enters the low-temperature storage tank for storage. Part of the unliquefied air enters the cold storage heat exchanger through the pipeline and is discharged; When energy is available, the cryopump pressurizes the liquid air to an ultra-supercritical pressure, and the high-pressure liquid air is heated to an ultra-supercritical state in the cold storage/heat exchanger to recover cold energy, and the heat of compression is absorbed in the heat storage/heat exchanger to make the supercritical The supercritical air heats up further, and then enters the turbine unit composed of the high-pressure turbine and the low-pressure turbine to expand and do work, driving the generator to generate electricity. the

In the ultra-supercritical air energy storage system, the drive unit is powered by one or more of grid or conventional power station low-peak power, nuclear power, wind power, solar power, biomass power, hydropower or tidal power driven motor. the

The ultra-supercritical air energy storage system described above, its energy storage process is activated when the power is low, renewable energy is limited, or the power quality does not meet the requirements for grid connection; Enabled when fluctuating. the

Preferably, the system includes an energy storage subsystem and an energy release subsystem: in the energy storage subsystem, the drive unit, compressor unit, heat storage/heat exchanger, cold storage/heat exchanger, expansion unit, low temperature The storage tanks are sequentially connected through a pipeline group; in the energy release subsystem, the low-temperature storage tanks, valves, cryopumps, cold storage/heat exchangers, heat storage/heat exchangers, turbine units, and generators are connected through another The pipeline groups are connected sequentially. the

Preferably, the compressor unit includes at least one low-pressure compressor and at least one high-pressure compressor, which are connected in series or integrated into an overall multi-stage compressor unit, wherein the air inlet of the first-stage compressor is connected to the air source, and each stage In the compressor, the air outlet of the upper-stage compressor passes through the heat storage/heat exchanger through the pipeline and is connected to the air inlet of the next-stage compressor, and the air outlet of the last-stage high-pressure compressor passes through the pipeline The heat storage/heat exchanger and the cold storage/heat exchanger are communicated with the air inlet of the expansion unit. the

Preferably, the turbine unit includes at least one low-pressure turbine and at least one high-pressure turbine, which are connected in series or integrated into an overall multi-stage turbine unit, and the liquid air in the cryogenic storage tank passes through the valve, the cryopump, the cold storage tank in turn through the pipeline. /Heat exchanger, heat storage/Heat exchanger is converted into ultra-supercritical air and then passed into the first stage, turbines at all levels, the gas outlet of the upper stage turbine passes through the heat storage/heat exchange through the pipeline After the device, it is connected with the air inlet of the next-stage turbine in turn, and the air outlet of the last-stage low-pressure turbine is opened to the atmosphere. the

Preferably, the drive unit is fixedly connected to the transmission shaft of the compressor unit; the expansion unit can directly drive the compressor unit through a gearbox or be connected to the grid through another generator; the generator is fixed to the transmission shaft of the turbo unit catch. the

Preferably, the heat storage/heat exchanger is an insulated container, in which the heat storage medium is stored, and the ultra-supercritical air exchanges heat with the heat storage medium in direct contact or non-direct contact. One or a combination of heat and latent heat storage; the heat storage/heat exchanger is also provided with a pipeline connected to an external heat source; the cold storage/heat exchanger is an insulated container, and the cold storage medium is stored in the container. The ultra-supercritical air or liquid air is in direct contact or non-direct contact heat exchange with the cold storage medium, and the cold storage form is one or a combination of sensible heat storage or solid-liquid phase change cold storage; the bottom of the cold storage/heat exchanger There is a slag discharge pipeline. the

The compression process of the ultra-supercritical air energy storage system includes at least one expander, which is used to reduce the temperature and pressure of the compressed air for liquefaction and recovery of expansion work to improve system efficiency. the

In the ultra-supercritical air energy storage system, the heat storage/heat exchanger is also provided with a pipeline, which is connected to an external heat source. The external heat source can be a solar collector, industrial waste heat and various types of waste heat. The waste heat and waste heat mentioned above are the waste heat and waste heat of power plants, cement industry, iron and steel metallurgy industry and chemical industry; waste heat and waste heat can be stored in heat storage/heat exchanger, or can be stored in special heat storage/heat exchanger . the

The ultra-supercritical air energy storage system, the air compression and cooling process also includes air purification and purification to remove solids and impurity gases in the air; the air purification and purification equipment is integrated in the compressor unit and the cold storage/heat exchanger , not represented separately. the

The ultra-supercritical air energy storage system, the compressor unit; when there are multiple compressors, the multiple compressors are in the form of coaxial series connection or sub-shaft parallel connection; The drive shaft is dynamically connected; the exhaust gas of the compressors at all levels is cooled by the heat storage/heat exchanger. the

In the ultra-supercritical air energy storage system, the total expansion ratio of the turbine unit is between 50 and 420, and the exhaust gas of the final stage turbine is close to normal pressure; when there are multiple turbines, the multiple turbines are coaxial and connected in series In the parallel connection mode, each sub-shaft is dynamically connected with the main drive shaft; the intake air of the turbines at all levels is first heated by the heat storage/heat exchanger. the

In the ultra-supercritical air energy storage system, the compressor can be piston type, centrifugal type, axial flow type, screw type or combined type; the expander and turbine can be piston type, axial flow type , centripetal, screw or mixed. the

In the ultra-supercritical air energy storage system, when there are multiple compressors and multiple expanders/turbines, the multiple compressors and multiple expanders/turbines are distributed on one drive shaft or multiple drive shafts on, connected through the gearbox. the

In the ultra-supercritical air energy storage system, the flow of working air is not limited by the flow of compressed air. the

In the ultra-supercritical air energy storage system, the heat storage form of the heat storage/heat exchanger is one or more of sensible heat, latent heat or chemical reaction heat; the heat storage medium used is water, paraffin wax , biomass oil, inorganic crystalline hydrated salt, molten salt, metals and their alloys, organic fatty acids, stones, rocks or concrete, and the heat storage medium is stored in an insulated container;

Among them, the heat storage/heat exchanger, when storing energy, recovers and stores the compression heat generated by the compressor, and when releasing energy, heats the compressed air before the expanders at all levels; when releasing energy, waste heat and waste heat can also be input through pipelines Supplement heat for heat storage/exchanger. the

In the ultra-supercritical air energy storage system, the cold storage/heat exchanger cools the ultra-supercritical air to 81K-150K (K is the Kelvin temperature unit), which is used in sensible heat storage or solid-liquid phase change storage One or a combination; the sensible heat storage medium used is one or more of sealed ice balls, sand and gravel, concrete, aluminum tape or other metal substances; the solid-liquid phase change cold storage medium is a solid-liquid phase change One or more of ammonia and its aqueous solution, salt solution, alkanes, olefins and their compounds, alcohols and their aqueous solutions at a temperature between 81K and 273K, and the cold storage medium is stored in an insulated container; The critical air or liquid air is in direct contact or non-direct contact heat exchange with the cold storage medium in the cold storage/heat exchanger; when storing energy, the cold storage/heat exchanger further cools the ultra-supercritical air for liquefaction, and when releasing energy, The cold storage/heat exchanger recovers and stores the cold energy during the heating process of high-pressure liquid air. the

In the ultra-supercritical air energy storage system, the cold storage/heat exchanger is equipped with a throttling device when the low-temperature cooling capacity is insufficient, so that the air close to the liquefaction point can be liquefied and enter the storage tank after being slightly lowered in temperature and pressure. . Throttles are also likely to be removed. the

In the ultra-supercritical air energy storage system, the low-temperature storage tank is a Dewar storage tank or a low-temperature storage tank, and liquid air is stored under normal pressure or under a certain pressure. the

In the ultra-supercritical air energy storage system, the cryopumps are reciprocating, centrifugal or hybrid, and pressurize the liquid air to 5.0MPa-42MPa; when there are multiple sets, they are connected in series or parallel in multiple stages. the

In the ultra-supercritical air energy storage system, when storing energy, the energy storage capacity is adjusted by controlling the intake air volume of the first-stage compressor. In the ultra-supercritical air energy storage system, the control of the air intake of the first-stage compressor is achieved by adjusting the load of the compressor, the opening of the valve, the driving speed, starting and stopping some compressors, or adjusting the pressure ratio. Gas volume control. When releasing energy, the power generation capacity is adjusted by controlling the vaporization amount of liquid air. the

The utility model has the advantages that the energy storage efficiency is 4-7 percentage points higher than that of the supercritical air system, and the energy storage density is 30% higher than that of the supercritical air system. At the same time, the energy storage cycle is unlimited, applicable to various types of power stations, environmentally friendly, waste heat can be recovered, and no large storage devices are required, which improves the efficiency of land and resource use and has broad application prospects. the

Description of drawings

Fig. 1 is the structural schematic diagram of Embodiment 1 of the ultra-supercritical air energy storage/energy release system of the present utility model;

Fig. 2 is a structural schematic diagram of Embodiment 2 of the ultra-supercritical air energy storage/energy release system of the present invention. the

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings and examples. the

The ultra-supercritical air energy storage/energy release system of the utility model uses the power station's trough (low price) electric energy to compress the air to an ultra-supercritical state (while storing compression heat), and then uses an expander to cool down and depressurize the air while recovering the expansion use the stored cold energy to cool, liquefy and store the compressed air (energy storage); at the peak of power consumption, the liquid air is pressurized to absorb heat to an ultra-supercritical state (while the cold energy in the liquid air is recovered Storage), and after further absorbing the stored compression heat, drive the generator to generate electricity (energy release) through the turbine unit, during which some industrial waste heat can be recovered to improve system efficiency. The ultra-supercritical air energy storage system proposed by the utility model has the outstanding advantage of high energy storage efficiency. Due to the use of optimized processes and higher parameters, the system efficiency can be higher than that of the supercritical air energy storage system, and the preliminary estimate can reach more than 70%. The energy storage density is increased by about 30% to 50%, the energy storage period is not limited, the storage device is greatly reduced, it is suitable for various types of power stations, it is environmentally friendly, and various industrial waste heat can be recycled. the

Example:

Fig. 1 is the embodiment 1 of the ultra-supercritical air energy storage/energy release system of the present invention. Including low-pressure compressors 1, 3, heat storage/heat exchanger 2, high-pressure compressors 35, 38, expander 40 (at least one stage), cold storage/heat exchanger 4, cryogenic storage tank 6, valve 7, cryopump 8 , high-pressure turbines 9, 10, low-pressure turbines 43, 46, generator 11, drive unit 12, pipelines 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 30, 31, 34, 36, 37, 39, 41, 42, 44, 45, etc., and Air A. the

The driving unit 12 is fixedly connected to the common transmission shafts of the compressors 1, 3, 35, 38, and the common transmission shafts of the generator 11 and the turbines 9, 10, 43, 46 are fixedly connected. Low-pressure compressors 1 and 3 are connected to heat storage/heat exchanger 2 through pipelines 13, 14 and 15, and high-pressure compressors 35 and 38 are connected to heat storage/heat exchanger 2 through pipelines 34, 36, 37 and 39, respectively. The inlet of low-pressure compressor 1 is connected with air A. The ultra-supercritical air passing through the heat storage/heat exchanger is cooled by the cold storage heat exchanger 4 through the pipeline 16, and then liquefied after being cooled by the expander 40 to perform work. The heat storage/heat exchanger 2 , the cold storage/heat exchanger 4 , and the low-temperature storage tank 6 are connected in sequence through pipelines 16 , 30 , 31 , 18 , and 19 . A valve 7 and a cryopump 8 are provided in the pipeline 31 , and the valve 7 is located upstream of the cryopump 8 . Heat storage/heat exchanger 2 is connected to high-pressure turbines 9 and 10 through pipelines 20 , 21 and 22 , and connected to low-pressure turbines 43 and 46 through pipelines 41 , 42 , 44 and 45 . The gas outlet of the low-pressure turbine 46 leads to the atmosphere. the

The heat storage/heat exchanger 2 communicates with an external heat source through a pipeline 23 . A slag discharge pipeline 24 is provided at the bottom of the cold storage/heat exchanger 4 . the

During energy storage, low valley (low price) electric energy drives the drive unit 12 to drive the compressor unit, and the purified air A enters the compressor unit for step-by-step compression, and exchanges heat with the heat storage medium through the heat storage/heat exchanger 2 to store the compression heat, realizing Intermediate cooling until it enters the high-pressure compressor 38 and is compressed to an ultra-supercritical state. The ultra-supercritical air is sent to the heat storage/heat exchanger 2 through the pipeline 39 to store the compression heat. The ultra-supercritical air cooled to a certain temperature enters the cold storage / The heat exchanger 4 is further cooled to a lower temperature by the cold storage medium, enters the low-temperature expander 40 (at least one stage) to expand and perform work, and is liquefied after cooling down and depressurizing. The liquid air is stored in the low-temperature storage tank 6 through the pipeline 30 . When releasing the energy, open the valve 7, and the cryopump 8 pressurizes the liquid air from the cryogenic storage tank 6 to an ultra-supercritical pressure, and then transports it to the cold storage/heat exchanger 4 through the pipeline 18 to exchange heat with the cold storage medium and gasify it. The cooling capacity is recovered, and the ultra-supercritical air exiting the cold storage/heat exchanger 4 enters the heat storage/heat exchanger 2 through the pipeline 19 to further raise the temperature. The outlet air continues to enter the heat storage/heat exchanger 2 to absorb heat and heat up, enter the next stage turbine to expand and do work, until the work done by the final stage turbine is completed, and the exhausted air is discharged to the atmosphere. The turbine set drives the generator 11 to generate electricity. the

In general, the energy storage and energy release processes do not run simultaneously. When storing energy, the compressor unit and the expander work, the turbine generator unit and the cryopump 8 are shut down, the valve 7 is closed, the heat storage/heat exchanger 2 recovers and stores the compression heat, and at the same time cools the working gas, and the cold storage/heat exchanger 4 releases it Cooling capacity, which cools the ultra-supercritical air to a low temperature. The opposite is true when the energy is released, the compressor unit and the expansion unit stop, the turbine unit and the cryopump 8 work, the valve 7 opens, the cold storage/heat exchanger 4 recovers and stores cold energy, and at the same time, the high-pressure liquid air heats up to an ultra-supercritical state, heat storage /Heat exchanger 2 releases the heat of compression to further increase the temperature of the ultra-supercritical air. In addition, external heat such as solar energy, waste heat, and waste heat can enter the heat storage/heat exchanger 2 through the pipeline 23 for storage at any time, or can be stored in an independent heat storage/heat exchanger (not shown in the figure); The supercritical air enters the cold storage/heat exchanger 4 for cooling, and the impurities and pollutants separated during this process can be discharged through the pipeline 24 . the

Figure 2 is Embodiment 2 of the ultra-supercritical air energy storage/energy release system of the present invention. Its structure is basically the same as that of Embodiment 1, but a throttle valve 48 is added after the low-temperature expander. The ultra-supercritical air cooled by the cool-storage heat exchanger 4 enters the throttle valve 48 for further liquefaction after the expander 40 performs work and lowers the temperature and pressure. Other workflows are similar to Example 1. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the scope of the present utility model. the

Claims (10)

1. ultra supercritical air energy storage/release can system, comprise compressor bank (1,3,35,38), accumulation of heat/heat exchanger (2), cold-storage/heat exchanger (4), low-temperature storage tank (6), valve (7), cryopump (8), turbines (9,10,43,46), generator (11), driver element (12), it is characterized in that:

Described system also comprises expansion unit (40), described compressor bank (1,3,35,38) with air compressing to the ultra supercritical state, combination by described expansion unit (40) or expansion unit (40) and throttle valve (48) is depressurized to liquid state with the ultra supercritical air cooling-down, and liquid air is stored in the described low-temperature storage tank (6).

2. ultra supercritical air according to claim 1 energy storage/release can system, it is characterized in that: described system comprises the energy storage subtense angle and releases the energy subtense angle: in the described energy storage subtense angle, described driver element (12), compressor bank (1,3,35,38), accumulation of heat/heat exchanger (2), cold-storage/heat exchanger (4), expansion unit (40), low-temperature storage tank (6) are through a pipeline group (13,14,15,34,36,37,39,16,30) successively order UNICOM; Described releasing in the energy subtense angle, described low-temperature storage tank (6), valve (7), cryopump (8), cold-storage/heat exchanger (4), accumulation of heat/heat exchanger (2), turbines (9,10,43,46), generator (11) are through another pipeline group (31,18,19,20,21,22,41,42,44,45) successively order UNICOM.

3. ultra supercritical air according to claim 1 and 2 energy storage/release can system, it is characterized in that: described compressor bank (1,3,35,38) comprise at least one low pressure compressor (1), at least one high pressure compressor (35), mutually connect or be integrated into whole multistage compression unit, wherein the suction port of first order compressor connects air-source, and in each stage compressor, the air outlet of upper level compressor links to each other with the suction port of next stage compressor after pipeline passes described accumulation of heat/heat exchanger (2), and the air outlet of afterbody high pressure compressor (38) is through pipeline (39,16) pass behind described accumulation of heat/heat exchanger (2) and the cold-storage/heat exchanger (4) and the suction port UNICOM of described expansion unit (40).

4. ultra supercritical air according to claim 1 and 2 energy storage/release can system, it is characterized in that: described turbines (9,10,43,46) comprise at least one low-pressure turbine (46), at least one high pressure turbine (10), mutually connect or be integrated into whole multistage turbine unit, liquid air in the described low-temperature storage tank (6) passes through valve (7) successively through pipeline, cryopump (8), cold-storage/heat exchanger (4), accumulation of heat/heat exchanger (2) passes in the first order after changing the air of ultra supercritical state into, in each stage turbine, the air outlet of upper level turbo machine is connected with the suction port of next stage turbo machine after pipeline passes described accumulation of heat/heat exchanger (2) successively, and the air outlet of afterbody low-pressure turbine (46) leads to atmosphere.

5. ultra supercritical air according to claim 1 energy storage/release the energy system, it is characterized in that: described driver element (12) is affixed with the transmission shaft of compressor bank (1,3,35,38); Described expansion unit (40) can directly drive described compressor bank (1,3,35,38) or pass through another generator connecting in parallel with system by gearbox; Described generator (11) is affixed with the transmission shaft of turbines (9,10,43,46).

6. ultra supercritical air according to claim 1 energy storage/release the energy system, it is characterized in that: described low-temperature storage tank (6) is Dewar storage tank or low temperature storing tank, liquid air stores under normal pressure or band certain pressure situation.

7. ultra supercritical air according to claim 1 energy storage/release can system, it is characterized in that: described accumulation of heat/heat exchanger (2) is heat-insulating container, heat storage medium is stored in the container, the ultra supercritical air therein with heat storage medium direct contact heat transfer or non-direct contact heat transfer, heat storage type is a kind of in sensible heat, the latent-heat storage or combination; Described accumulation of heat/heat exchanger (2) also is provided with the pipeline (23) that links with extraneous thermal source; Described cold-storage/heat exchanger (4) is heat-insulating container, cool storage medium is stored in the container, ultra supercritical air or liquid air therein with cool storage medium direct contact heat transfer or non-direct contact heat transfer, its cold-storage form is a kind of in sensible heat cold-storage or the solid-liquid phase change cold-storage or combination; Cold-storage/heat exchanger (4) bottom is provided with deslagging pipeline (24).

8. ultra supercritical air according to claim 1 energy storage/release the energy system, it is characterized in that: described cryopump (8) is pressurized to 5.0MPa～42MPa for reciprocating type, centrifugal or hybrid with liquid air; In the time of many, be plural serial stage or parallel connection.

9. ultra supercritical air according to claim 1 energy storage/release can system, it is characterized in that: described driver element (12) is the motor that drives with electrical network or conventional power plant trough-electricity, nuclear power, wind-powered electricity generation, solar electrical energy generation, biomass power generation, water power or tidal power generation one or more power supplys wherein.

10. ultra supercritical air according to claim 1 energy storage/release can system, it is characterized in that: described accumulation of heat/heat exchanger (2), the heat storage medium of employing are water, paraffin, bio-oil, mineral-type crystalline hydrate salt, fuse salt, metal or its alloy, organic fatty acid, stone, rock or concrete; Described cold-storage/heat exchanger (4) adopts sensible heat cool storage medium or solid-liquid phase change cool storage medium, and described sensible heat cool storage medium is sealing ice hockey, sandstone, concrete or aluminium strip dish.

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