6502results about "Steam engine plants" patented technology

The invention provides a thermal power plant flexibility transformation and deep peak regulation optimization control method and system, and relates to the technical field of control engineering, and the method comprises the steps: collecting the omnibearing operation data of a thermal power plant to construct a multi-level thermal power plant dynamic nonlinear model, carrying out the real-time identification of model parameters, generating an identification result, and building a multi-dimensional thermal power plant operation characteristic database; based on the thermal power plant operation characteristic database, designing a transformation scheme, and performing visual simulation and optimization to obtain a flexible transformation result; constructing a multi-objective optimization function, formulating an adaptive deep peak regulation optimization control strategy, carrying out short-term and medium-term prediction on a power grid load, generating an initial control strategy based on a prediction result, carrying out online optimization and adjustment, and continuously evaluating and optimizing the control strategy.

The invention provides a steam extraction energy storage and fused salt heat storage method and system under power grid deep peak regulation, and relates to the technical field of power grids, and the method comprises the steps: determining a power grid deep peak regulation period according to power grid load prediction data and renewable energy power generation prediction data; steam extraction operation is conducted on the steam turbine based on model predictive control, and extracted steam is introduced into the multi-stage steam extraction energy storage device; the steam passing through the multi-stage steam extraction energy storage device is introduced into the heat exchanger and exchanges heat with the fused salt in the fused salt storage tank; in the power utilization peak period of the power grid, the multi-stage steam extraction energy storage device and the fused salt heat storage device are controlled to release heat energy; a steam extraction energy storage and fused salt heat storage collaborative optimization model is established, and the steam extraction amount, the energy storage and release time and the fused salt heat storage capacity are optimized and adjusted according to power grid load characteristics, renewable energy source output characteristics and system equipment parameters; and through the collaborative optimization model, multi-target balance of power grid deep peak regulation, renewable energy consumption and system economy is realized.

The invention relates to the technical field of steam turbine testing, in particular to a testing system for mismatch correction of a wide-load-interval thermal power generating unit speed regulation model, which comprises a thermodynamic system component, a speed regulation system device, a dynamic signal acquisition device and a control device, a dynamic signal processing module analyzes the relevance between main steam pressure sudden change and control valve opening oscillation in real time, a dynamic response database including a time sequence is constructed, and a control valve opening feed-forward compensation instruction and a combustor fuel distribution gradient adjustment signal are generated according to correction parameters. Power over-modulation wave crests caused by sudden load change are suppressed, and primary frequency modulation action delay is reduced; and the simulation verification module compares measured data with model output through an error feedback mechanism, dynamically adjusts high-pressure cylinder flow characteristic curve calibration parameters, optimizes a control strategy in combination with a network-related safety margin evaluation result, and realizes improvement of dynamic response precision in a full peak regulation interval and enhancement of power grid frequency stability.

The invention provides a one-key start-stop operation monitoring method and system for a gas-steam combined cycle unit, and relates to the technical field of equipment state monitoring, and the method comprises the steps: obtaining operation data, carrying out the data cleaning, noise reduction and standardization, and extracting the performance characteristics of the unit; constructing a component correlation model based on the spatial-temporal characteristics, and optimizing operation efficiency parameters; and performing fault diagnosis by using a multi-modal feature enhancement network, constructing a layered optimization control system, and performing control strategy optimization to obtain an optimal control strategy. According to the invention, intelligent monitoring, fault diagnosis and optimal control of the gas-steam combined cycle unit can be realized, the operation efficiency and reliability of the unit are improved, the fault risk is reduced, and the service life of equipment is prolonged.

Embodiments of systems and methods for converting thermal energy to electrical power are disclosed. In embodiments, a system for converting thermal energy to electrical power may include a thermal cycle device. The thermal cycle device may include an evaporator including a first fluid path for a flow of heated fluid and a second fluid path for a flow of a working fluid and configured to indirectly transfer heat from the flow of heated fluid to the flow of working fluid, a condenser to cool the working fluid, a pump to transport working fluid from the condenser, an expander to generate electrical power via the working fluid, and a loop for the flow of the working fluid. The system may include an amount of heat carrier injected into the loop and configured to adsorb and desorb the working fluid and generate additional heat to increase output of electrical power.

A turbine engine for an aircraft. The turbine engine includes a combustor fluidly coupled to a fuel delivery assembly to receive fuel from the fuel delivery assembly. The fuel is injected into the combustor and combusted in the combustor to generate combustion gases. A condenser is located downstream of the combustor to receive the combustion gases and to condense water. A fuel heat exchanger is thermally coupled to the condenser by at least one heat transfer loop to receive heat from the condenser.

The invention discloses a carbon capture and energy storage and thermal power generation coupled energy comprehensive utilization system, which comprises a thermal power generation system, an energy storage system and a carbon capture system, and is characterized in that a compression energy storage unit of the energy storage system is coupled to a feed water heat regeneration unit of the thermal power generation system; an expansion energy release unit of the energy storage system is coupled to a steam turbine generator set of the thermal power generation system, and a steam-water cycle working medium in the thermal power generation system serves as a heat storage and cold storage medium of the carbon dioxide energy storage system. The carbon capture system is coupled between the thermal power generation system and the carbon dioxide energy storage system, captures carbon dioxide gas in the flue gas, inputs the carbon dioxide gas into the carbon dioxide energy storage system to serve as a circulating working medium, and heats the circulating working medium in the expansion energy release unit through waste heat of the flue gas. According to the scheme, the operation efficiency of the thermal power generation system and the operation efficiency of the carbon dioxide energy storage system can be improved, the overall energy utilization efficiency of the system can be improved, and meanwhile the emission amount of gas pollutants is reduced.

The invention provides a method and a system for utilizing high-pressure water as a high-temperature compressed air energy storage heat exchange working medium, the system comprises an air compression unit and an air turbine, the pressure of nitrogen output by a nitrogen conveying unit is any saturated vapor pressure which is 10 DEG C lower than the outlet temperature of the air compression unit and corresponds to water vapor in the outlet temperature range of the air compression unit; the energy storage and release unit comprises a first heat exchanger, a shell pass inlet is connected with an air compression unit through a pipeline, a shell pass outlet is connected with an air storage device through a pipeline, a tube pass inlet is connected with a low-temperature water storage tank through a pipeline, and a tube pass outlet is connected with a high-temperature water storage tank through a pipeline; the low-temperature water storage tank is connected with the nitrogen conveying unit through a pipeline, a tube pass inlet of the second heat exchanger is connected with the high-temperature water storage tank through a pipeline, a tube pass outlet is connected with the low-temperature water storage tank through a pipeline, a shell pass inlet is connected with the gas storage device through a pipeline, and a shell pass outlet is connected with the air turbine through a pipeline. The system complexity is reduced, and the investment of heat storage and exchange working media is also reduced.

The invention discloses a tunnel type underground gas storage combined with temperature control, belongs to the technical field of compressed air energy storage, and can solve the problems that the cost of temperature control measures in an existing gas storage is high, and maintenance is difficult. The gas storage comprises a lining; the sealing structure covers the inner wall surface of the lining; the breathable heat conduction structure sleeves the inner side of the sealing structure; an annular cavity is formed between the sealing structure and the breathable heat conduction structure; the annular partition pieces are sequentially arranged in the annular cavity in the axial direction of the gas storage and used for dividing the annular cavity into a first temperature control area and other temperature control areas which are sequentially arranged, and the simulated operation temperature of each temperature control area is sequentially increased from the first temperature control area; a water storage bag is arranged in each temperature control area; and the water circulation structure is arranged on the outer side of the gas storage, communicates with each water storage bag and is used for forming a circulation water path with the water storage bags. The method is used for temperature control of the tunnel type underground gas storage.

The invention relates to the technical field of supercritical compressed carbon dioxide energy storage, in particular to an adiabatic supercritical compressed carbon dioxide energy storage system. An expansion unit; during energy storage, the heat storage tank stores compression heat of the supercritical carbon dioxide in the high-temperature and high-pressure state, and the supercritical carbon dioxide in the high-temperature and high-pressure state is cooled to the temperature the same as that of the high-pressure gas storage chamber; during energy release, the heat storage tank heats the low-temperature high-pressure supercritical carbon dioxide discharged from the high-pressure gas storage chamber; the temperature control system adjusts the flow of the cooling medium in the second heat exchanger, controls the inlet temperature of the compressor and further adjusts the inlet temperature of each stage of expansion machine, it is guaranteed that the carbon dioxide temperature of the inlet position of each stage of expansion machine is not lower than the liquefaction critical temperature, and the large-area liquefaction phenomenon does not occur. According to the temperature control system, the phenomenon that in the prior art, when carbon dioxide is at low temperature, carbon dioxide is liquefied, and large-area condensation occurs in the expansion machine can be effectively overcome, and then the operation efficiency and the energy storage efficiency of the system are guaranteed.

The invention discloses a coal-fired power generation steam and heat pump integrated energy storage system and an operation method thereof. The system comprises a coal-fired unit coupling fused salt energy release system and a reheat steam coupling heat pump energy storage system. In the low ebb of electricity utilization, the coal-fired unit outputs electric energy to drive the heat pump charging compressor to compress a heat pump working medium, then the heat pump working medium heats the fused salt, meanwhile, part of reheat steam of the coal-fired unit sequentially heats the fused salt and a working medium at an outlet of the heat pump charging expansion machine, and the load is further reduced; and finally, redundant electric energy and part of heat energy of the reheated steam are converted into fused salt heat energy to be stored. In the peak period of electricity utilization, a part of exhaust steam of the high-pressure cylinder is heated through heat stored in the fused salt storage tank to generate reheated steam, the heat absorption capacity of main steam entering the boiler is increased under the condition that the coal consumption of the boiler is not changed, the flow of the main steam is also increased, and then the output load of the coal-fired unit is increased. According to the method, the peak regulation potential of the coal-fired unit can be exerted, the output load interval of the unit is expanded, and the method is effective for improving the peak regulation capacity of the coal-fired unit and stabilizing power grid fluctuation.

The invention discloses a steam and fused salt coupled heat storage and release peak shaving system and method. The existing steam sensible heat molten salt heating or pure electric molten salt heating technology has the problems of complex technical process, high construction cost, high implementation difficulty, low system electricity-electricity conversion efficiency and the like. The system comprises a fused salt storage system, a heat storage and exchange system, a heat release and exchange system, boiler equipment and steam turbine equipment, an outlet of the boiler equipment is connected with the steam turbine equipment and the heat storage and exchange system, the fused salt storage system is connected with the heat storage and exchange system and the heat release and exchange system, and the heat release and exchange system is connected with the steam turbine equipment. According to the invention, machine-boiler decoupling and electric heat storage peak regulation of a traditional thermal power plant can be realized. In the heat storage process, latent heat and sensible heat energy of main steam are stored in a fused salt storage system through a heat storage and exchange system, and deep peak regulation and energy storage are achieved; and in the heat release process, heat in the fused salt storage system is released through the heat release heat exchange system, and steam is prepared and supplemented into steam turbine equipment so as to improve the power generation power.

The invention discloses a low-carbon flexible coal-fired unit power control system and method, and relates to the technical field of power systems, and the system comprises a cascade waste heat recovery module, a boiler deep regulation and control module, a thermal coordination module, an environmental protection and emission reduction module, an intelligent operation scheduling module and an energy efficiency monitoring module. The gradient waste heat recovery module carries out gradient recovery on flue gas heat energy according to temperature zone grades; the boiler depth regulation and control module is used for regulating combustion air supply and heat absorption paths to realize low-load stable combustion; the thermal coordination module dynamically distributes thermal loads between the multiple heat sources and the thermal units; the environmental protection and emission reduction module jointly controls desulfurization, denitration and wastewater resourceful treatment; the intelligent operation scheduling module generates a load regulation and control instruction and coordinates multi-module response; the energy efficiency monitoring module collects and analyzes energy consumption and emission indexes and assists strategy optimization. The energy efficiency utilization and emission control capability of the unit under the deep peak regulation condition is improved, and flexible, efficient and low-carbon operation is achieved.

The invention relates to the technical field of energy, in particular to a dynamic self-adaptive control method and system for a gas-steam combined cycle unit, and the method comprises the steps: constructing a multi-modal model library comprising a plurality of operation modes; operating parameters and environment parameters of the unit are collected in real time, and multi-source data fusion and system state evaluation are carried out; carrying out multi-time scale prediction on the load demand, fuel characteristics and environmental parameters of the unit based on a deep learning model; dynamically selecting model precision according to a prediction result, and implementing a multi-mode collaborative optimization decision to generate a control instruction; and executing the control instruction and monitoring an execution effect, and carrying out adaptive adjustment on model parameters and strategies according to feedback. According to the method, the unit can maintain efficient and stable operation under the scenes of power grid peak regulation, rapid load fluctuation, complex environment change and the like, meanwhile, pollutant emission is reduced, and the service life of key equipment is prolonged.

The invention provides an efficient and stable ship hybrid power generation system which comprises a hydrogen production unit and an ammonia supply system, and the hydrogen production unit comprises an ammonia decomposer, a hydrogen separator, a high-pressure hydrogen storage tank, a fuel cell and an ammonia-hydrogen internal combustion engine. The ammonia decomposer enables the ammonia flow to enter the ammonia decomposer in a segmented constant mode for catalytic decomposition through four set working conditions; the hydrogen separator is used for separating and purifying the generated mixed gas, and the separated and purified hydrogen is respectively fed into the fuel cell and the ammonia-hydrogen internal combustion engine through valves for power generation; the molten salt system recycles high-temperature tail gas of the ammonia-hydrogen internal combustion engine through the heat exchanger for heat energy storage and power generation through the steam Rankine cycle system. The regulation and control method is used for stabilizing the system and prolonging the service life of equipment by limiting the dynamic loading rate and start-stop times of the fuel cell and the ammonia-hydrogen internal combustion engine, and is used for waste heat recovery power generation through the molten salt and the steam expansion machine, so that the efficiency of the system is improved.

The invention discloses a heat supply unit coupling fused salt heat storage power generation peak regulation system and an operation method.The system comprises a power station boiler, a turboset and a fused salt heat storage peak regulation device, and the fused salt heat storage peak regulation device comprises a low-temperature fused salt storage tank, a high-temperature fused salt storage tank, a fused salt heat storage mechanism and a fused salt heat release mechanism; the fused salt heat storage mechanism heats fused salt in a stepped mode through steam waste heat, flue gas waste heat and electric energy for heat storage, heat obtained after the waste heat is recycled is used for heat supply through steam, and when the system is subjected to load rising and peak shaving, the fused salt heat release mechanism conducts three-stage cooling heat exchange on the high-temperature fused salt for heat release. High-parameter steam generated by high-temperature molten salt cascade heat release is returned to the turboset to do work and generate power, and medium-parameter steam is generated to replace steam extraction and heat supply of the turboset to increase power generation of the turboset. By reasonably designing a multi-stage heat exchange flow process in the fused salt heat storage and release process, cascade efficient utilization of different grades of energy is achieved, and the high efficiency and flexibility of system operation are improved.

A turbine engine for an aircraft including a combustor, a turbine, and a steam system. The combustor generates combustion gases. The turbine receives the combustion gases and is drivingly coupled to a shaft. The steam system includes a boiler, a superheater, and a steam turbine. The boiler receives water and is fluidly connected to the combustor to receive a first portion of the combustion gases from the combustor and to boil the water to generate steam. The superheater is located downstream of the combustor to receive a second portion of the combustion gases from the combustor and to heat the steam. The steam turbine is fluidly coupled to the superheater to receive the steam from the superheater and to rotate the steam turbine. The steam turbine is drivingly coupled to the shaft.

The invention relates to the field of liquid air energy storage, and discloses a liquid air energy storage and liquefied natural gas coupling efficient power generation device and method. The method comprises the steps that an air liquefaction circulation loop purifies, compresses and cools ambient air and then expands and decompresses the ambient air to obtain liquid air, and the liquid air is transmitted to an air power generation circulation loop; generated air compression heat is stored in the heat storage unit; the air power generation circulation loop generates power through expansion of received liquid air, and generated cold energy is stored in a cold storage unit; the LNG vaporization supply loop pressurizes, evaporates and gasifies liquefied natural gas and then supplies the liquefied natural gas to a user side, generated cold energy is stored in a cold storage unit or directly supplied to the air liquefaction circulation loop, and meanwhile gaseous natural gas naturally released by an LNG tank is collected and conveyed to a combustion chamber. The high-grade heat energy utilization loop conducts heat conduction oil circulation, low-grade heat energy and high-grade natural gas combustion heat energy of the heat storage unit are recycled in sequence, high-grade heat energy is transmitted to the air power generation circulation loop, and heat conduction oil returns to the initial state to continue circulation after releasing the heat energy.

The invention discloses a Carnot battery system coupled with an uninterrupted low-temperature heat source and an integrated optimization method of the Carnot battery system. The Carnot battery system comprises a high-temperature heat pump system, a heat storage system and a power circulation system, in the charging process, the high-temperature heat pump system operates, and waste heat of the uninterrupted low-temperature heat source module is improved into high-grade heat energy to be stored in the heat storage system through renewable energy source electric power; in the discharging process, the power circulation system operates, gradient utilization is conducted on heat energy stored in the heat storage system and an uninterrupted low-temperature heat source in the discharging stage, and generated mechanical energy is converted into electric energy through a generator and output to a power grid. The system configuration does not depend on the working medium type, and the comprehensive utilization rate of the uninterrupted low-temperature heat source and the back-and-forth efficiency of the Carnot cell are improved; according to the integrated optimization method, the working medium is coded to become a continuous variable capable of being synchronously optimized, and the optimal charge-discharge cycle working medium combination and system operation parameters suitable for different operation conditions can be obtained only through one-time optimization.

The invention relates to the technical field of peak regulation of power generation systems, in particular to a multi-mode power generation system for a new energy large base and an operation method of the multi-mode power generation system. The multi-mode power generation system comprises a thermal power station and a fused salt energy storage power station. The thermal power station comprises a boiler, a first turbine, a first water return unit and a first generator; the fused salt energy storage power station comprises a high-temperature fused salt tank, a low-temperature fused salt tank, a fused salt heating unit, a steam-water heating unit, a second water return unit, a second steam turbine and a second generator; an air inlet of the fused salt heating unit is configured to obtain steam flowing out of the boiler, and a second discharging opening of the fused salt heating unit is connected with the first water return unit; an air outlet of the steam-water heating unit is connected with the first steam turbine and the second steam turbine. The first water return unit and the second water return unit are connected with a second feeding port of the steam-water heating unit. The multi-mode power generation system can set different operation modes according to different requirements, so that the new energy large base can meet higher requirements.

The invention discloses a control method and device for a supercritical carbon dioxide recompression cycle power generation system, and the method comprises the steps: predicting the load change of the supercritical carbon dioxide Brayton cycle power generation system according to the historical operation data and current operation state of the supercritical carbon dioxide Brayton cycle power generation system; predicting the surge risk of the compressor according to the load change of the supercritical carbon dioxide Brayton cycle power generation system; according to the load change of the supercritical carbon dioxide Brayton cycle power generation system, the split ratio is adjusted, so that the recompression Brayton cycle power generation system operates at the optimal efficiency; and the flow, pressure and temperature of a compressor working medium in the supercritical carbon dioxide Brayton cycle power generation system are adjusted according to the surge risk, so that the compressor works in a non-surge area. When the supercritical carbon dioxide Brayton cycle power generation system approaches the surge boundary, the system adjusts the opening degree of the bypass valve in advance for flow release, so that active closed-loop control of surge prediction-response-relief is achieved, a compressor is effectively prevented from entering an unstable area under sudden load change, start and stop or extreme disturbance, and the service life of the compressor is prolonged. And the safety stability and the operation continuity of the system are obviously improved.

The invention relates to the technical field of compressed carbon dioxide energy storage, and discloses a liquid compressed carbon dioxide energy storage system and method. The system comprises a carbon dioxide circulation system, and the circulation system comprises a first liquid storage tank (1), a first evaporation unit (100), an energy storage unit (200), a second liquid storage tank (6), a second evaporation unit (300), an energy release unit (400) and a condensation unit (500) which are communicated in sequence. According to the system provided by the invention, a liquid compressed carbon dioxide circulating system is deeply coupled with waste heat and waste cold in an ethylene process, so that the problems of a gasification heat source of liquid carbon dioxide on a high-pressure side and a liquefaction cold source of gaseous carbon dioxide on a low-pressure side of a pressure storage system are solved; the bottleneck constraint of heat energy utilization of the conventional adiabatic compression carbon dioxide energy storage system is broken through; elastic distribution of compression heat between industrial steam production and carbon dioxide overheating can be achieved.

The invention discloses a wind power-photovoltaic-photo-thermal cold power co-production system integrating heat pump energy storage and suitable for a large energy base, and belongs to the technical field of energy storage. A hot side outlet of a steam generator of the system is connected with an inlet of a second molten salt tank through a fourth molten salt pump, an outlet of the second molten salt tank is connected with an inlet of a first three-way valve through a second molten salt pump, and a first outlet of the first three-way valve is connected with an inlet of a heat collection tower. An outlet of the heat collecting tower is connected with a first inlet of a second three-way valve through a first molten salt pump; an outlet of the second three-way valve is connected with an inlet of a first molten salt tank; the compressor is connected with a hot-side inlet of the first heat exchanger, a hot-side outlet of the first heat exchanger is connected with an inlet of the turbine through a hot side of the second heat exchanger, and an outlet of the turbine is connected with an inlet of the compressor sequentially through a hot side of the third heat exchanger and a cold side of the second heat exchanger. According to the system, cold energy can be supplied to the outside through the heat pump energy storage system in the energy storage stage, cold and power cogeneration is achieved, and the comprehensive energy efficiency of the large energy base is improved.

The invention relates to the technical field of multi-energy complementary power generation, and discloses an industrial steam supply peak shaving system and method coupling fused salt heat storage and solar energy, and the industrial steam supply peak shaving system comprises a coal-fired power generation system and an industrial steam supply system; in the heat storage mode, the boiler, the steam cooler and the condenser are sequentially connected; in the heat release mode, the high-pressure heater, the primary feed water heater and the low-pressure cylinder are sequentially connected through pipelines; and the feed pump, the secondary feed water heater and the boiler are connected in sequence. In the low ebb of the electrical load, solar energy is used for heating fused salt to store heat, and part of high-temperature steam is extracted from steam-water circulation of the improved coal-fired power generation system to store the heat in a heat storage device and does not enter a steam turbine for power generation; the power load output is adjusted by adjusting the thermal load output of the thermodynamic system in the power generation process, and load decoupling of the boiler and the steam turbine is achieved. And in the electrical load peak, the stored heat energy is released back to steam-water circulation, and the electrical load of the coal-fired power generation system is increased.

The invention provides a fused salt heat storage coupled compressed air energy storage cooperative power generation system and a control method thereof.The fused salt heat storage coupled compressed air energy storage cooperative power generation system comprises a data acquisition module, a multi-target optimization decision algorithm based on dynamic programming, an energy distribution module, a dynamic adjustment module and a safety protection module; a multi-objective optimization decision algorithm based on dynamic programming automatically switches system working modes, an energy distribution module optimizes fused salt and air flow of a high-temperature fused salt air heat exchanger, and a dynamic adjusting module adjusts fused salt pump flow, compressor rotating speed and valve opening in real time. And the safety protection module is used for monitoring and preventing over-temperature, fused salt solidification and pipeline corrosion. The problems that in the prior art, a fused salt heat storage type photo-thermal power generation system is insufficient in heat storage capacity under the extreme weather condition, a compressed air energy storage system depends on fossil fuel, the afterburning efficiency is low, and the energy loss is caused due to the low system coupling degree can be effectively solved.

The invention discloses an energy storage-heat pump linkage heat, power and cold collaborative peak regulation system and an operation method. The system comprises a combined heat and power generation unit, an evaporator, a condenser, a compressor, wind power and photovoltaic power generation equipment, an electric power controller, a cross-seasonal energy storage chamber and the like. Surplus electric quantity of a power grid is consumed through a heat pump and converted into heat energy and cold energy in a power off-peak period, and part of condensed water of a steam turbine is heated through heat storage in a power peak period to improve the power output of a unit; the unit heats heating return water through heat storage release and steam turbine steam extraction in a cascade mode in winter, electric heating peak regulation is achieved, external cooling and electric cooling peak regulation are achieved through electric cooling conversion and cold energy release in summer, and cross-seasonal energy storage and peak regulation are achieved through electric heating and cold conversion in spring and autumn. Power storage is replaced by cold storage and heat storage, peak regulation is promoted through heat supply and cold supply, and the new energy power consumption level can be greatly improved.

A turbine engine for an aircraft. The turbine engine includes a fan, a combustor in a core air flowpath that generates combustion gases, a core shaft, a turbine that receives the combustion gases to rotate the turbine, and a steam system. The steam system extracts water from the combustion gases, vaporizes the water to generate steam, and injects the steam into the core air flowpath. The steam system includes one or more water storage devices that store the water therein. The one or more water storage devices include a first state in which the one or more water storage devices increase or maintain a level of the water as the water flows through the one or more water storage devices, and a second state in which the one or more water storage devices decrease the level of the water in the one or more water storage devices.

The invention discloses a novel compressed air energy storage system which comprises a constant-pressure diaphragm air pressure tank, an air compression energy release subsystem and a working medium gas gas-liquid conversion subsystem and has the advantages that two energy storage media are adopted, air serves as a main medium for compression expansion power generation, and working medium gas serves as a medium with stable pressure and does not participate in acting; alternation of air and working medium gas in the tank is completed through gas film contraction / expansion, and the pressure stabilizing effect of the two stages of energy storage and energy release is achieved; air is adopted for compression and expansion power generation at the energy storage and release end, compared with traditional carbon dioxide energy storage, a large carbon dioxide air storage bin at the low-pressure end of traditional carbon dioxide energy storage is removed and replaced with inexhaustible air, the air is directly discharged into the atmosphere in the energy release stage, and the equipment cost and the medium cost of the low-pressure air storage end are greatly reduced.

The invention discloses a Carnot battery system based on phase change cold storage and energy storage and a multi-mode operation method thereof, the Carnot battery system comprises a vapor compression refrigeration unit, a phase change cold storage device and a power cycle unit, in a charging stage, the vapor compression refrigeration unit is adopted to generate cold energy by using off-peak power; in the energy storage stage, cold energy prepared by the steam compression refrigeration unit is stored in a high-density mode through the phase change cold storage device; in the discharging stage, the stored cold energy serves as a cold source, external low-temperature waste heat serves as a heat source, a power circulation unit is adopted, meanwhile, the cold energy and the hot energy are utilized for heat-work conversion, and electric energy is released; according to the Carnot battery system provided by the invention, the round-trip efficiency and the energy storage density of an energy storage system can be improved, the energy storage cost is reduced, and large-scale long-time energy storage is facilitated; according to the multi-mode operation method provided by the invention, through dispatching application of the phase change cold storage device and the charge-discharge cycle, different types of low-temperature heat sources can be fully utilized, and the cold electricity energy consumption requirement of a user side is met.

The invention discloses a pressure storage and heat storage coupled regenerative heat pump power storage system and a regulation and control method thereof. The system is composed of an electric-power generation integrated unit, an energy storage compression and energy release expansion integrated unit, an energy storage expansion and energy release compression integrated unit, a high-temperature heat exchanger, a backheating heat exchanger, a cold energy absorption heat exchanger, a heat storage and cold storage storage tank, a high-pressure gas storage tank and the like. And an energy storage / energy release loop, a heat storage / heat release loop, a cold storage / cold release loop and a pressure heat coupling loop are formed by connecting pipelines. In the energy storage mode, the compressor unit is driven by electric energy to conduct multi-stage compression, and compression heat and expansion cold are stored in the high-temperature storage tank and the low-temperature storage tank correspondingly. In the energy release mode, the heat storage medium and the cold storage medium are sequentially released to supply heat or cold to the circulating working medium, and the expansion unit is driven to drive the generator to generate electricity. According to the method, bidirectional operation of energy storage and energy release is achieved through valve switching and circulation control, and power output and load change are adjusted within a second level through a pressure-heat coupling mechanism.