943 results about "Thermal energy storage system" patented technology

An integrated energy system includes a nuclear thermal plant situated on a nuclear site. The nuclear thermal plant produces thermal energy that is transported to a thermal energy storage system located outside the nuclear site. The thermal storage system is thermally coupled to a power generation system which is also remote to the nuclear site. By this arrangement, the nuclear thermal plant is isolated and decoupled from the power generation system. The nuclear thermal plant may supply thermal energy upwards of 800° C. or more to be stored at the thermal energy storage system until needed such as for industrial heat, power generation, or other uses. The thermal storage system is source agnostic, and one or more additional thermal energy generators, such as additional nuclear reactors, solar thermal plants, or other thermal energy generators can be coupled to a common thermal storage system and power generation system.

The invention discloses an approximate constant pressure type pressurized hot water heat storage system, and relates to the technical field of heat storage systems of compressed air energy storage power stations. The system comprises an under-pressure hot water heat storage system, and the under-pressure hot water heat storage system comprises a high-temperature water tank and a low-temperature water tank; the high-temperature water tank and the low-temperature water tank are filled with pressure-stabilizing gas and are connected through a communicating pipe; the pressure stabilizing system B comprises a buffer tank, a high-pressure gas storage tank and a pressure stabilizing gas pressurization system; the buffer tank is connected with the communicating pipe, and the high-pressure gas storage tank is connected with the communicating pipe. Compared with a high-pressure and high-temperature hot water heat storage system in the prior art, the air side pressure fluctuation range of the high-temperature water tank and the low-temperature water tank can be effectively reduced, stress fatigue of the high-temperature water tank and the low-temperature water tank is effectively relieved, the service life of the high-temperature water tank and the low-temperature water tank is prolonged, safety is improved, design difficulty and adopted measures are reduced, and the manufacturing cost of the storage tank is reduced. The invention further relates to an operation method of the approximate constant pressure type pressurized hot water heat storage system.

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 thermal equipment operation state dynamic test and compensation control, in particular to an AI-based boiler air pre-heater temperature uniformity regulation and control system, which comprises a collaborative closed-loop control network of a data acquisition module, an AI prediction module, a heat storage system control module, a temperature compensation control module and a thermal stress analysis module. The data acquisition module acquires flue gas temperature, coal quality parameters and load instructions in real time, the flue gas temperature, the coal quality parameters and the load instructions are transmitted to the AI prediction module through an industrial bus, XGBoost, LightGBM and a deep neural network model are used for carrying out spatial-temporal feature extraction on the evolution trend of a temperature field, and the heat storage system control module dynamically switches heat storage and release modes according to the load state. The heat distribution proportion among the multiple units is adjusted by combining the three-dimensional stress field distribution data of the thermal stress analysis module; the bottleneck of lack of thermal inertia regulation of an existing system is broken through, dynamic balance of a temperature field under the condition that thermal stress of a heat transfer element is controllable is achieved, and the heat exchange efficiency and operation stability of the air pre-heater are improved.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, there are thermal energy storage units that provide existing power plants with greater system efficiency, safety, and reduced fuel consumption.

The invention relates to the technical field of coal gas molten salt heat storage, and discloses a steel mill coal gas molten salt heat storage system and a heat storage operation method and device.According to the coal gas molten salt heat storage system, a coal gas combustion unit adjusts heat power to output flue gas; the high-temperature heat exchange unit and the combustion unit are integrated, and fused salt is heated to the target temperature; the flue gas waste heat exchange unit uses waste heat flue gas flowing out of the high-temperature heat exchange unit as a heat source to heat low-temperature fused salt to medium temperature; the molten salt flow mixing unit realizes high-temperature molten salt flow division backflow and closed-loop circulation; the closed-loop control system dynamically adjusts the backflow proportion and the combustion power based on real-time data to ensure stable and efficient operation of the system, the problems that a blast furnace gas heat source is unstable, temperature rise of molten salt is limited and an existing system lacks dynamic control are solved, safe operation of the system is guaranteed, the service life of equipment is prolonged, and the energy utilization efficiency is further improved. And stable fused salt temperature output and energy efficiency optimization are realized.

An electrically conductive brickwork module is used in a resistive heating or thermal energy storage system. The brickwork module includes an electrode constructed with metallic chromium physically and electrically connected to one or more electrically conductive bricks. The electrode is operational at temperatures in excess of 1300 C, or in some instances in excess of 1500 C. In some instances the electrodes are constructed of ceramic bricks having internally incorporated metallic agglomerates.

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a start-stop peak regulation coal-fired power generation system and method coupled with fused salt energy storage. According to the system and method for achieving safe and efficient start-stop peak regulation of the unit through coupled fused salt energy storage, when the unit needs to be shut down, a boiler operates at the lowest stable combustion load, a back pressure turbine is arranged to absorb boiler main steam to provide necessary auxiliary power for the unit, and fused salt and a water heat storage system are added to store boiler hot resteam; the original steam turbine of the unit stops, and the unit stops and does not stop the boiler; heat stored by the fused salt and water heat storage system is used for generating steam in unit starting and load increasing stages to increase the load increasing rate of a unit turbine. According to the method, the operation safety problem, the economical problem and the service life loss problem of unit start-stop peak regulation are solved.

The invention discloses an energy storage and release double-closed cycle carbon dioxide electric heating energy storage system and an energy storage method, and belongs to the technical field of energy storage. The energy storage system comprises an energy storage closed circulation system, an energy release closed circulation system, a heat storage system and a cold storage system; the energy storage closed circulation system and the energy release closed circulation system share the same set of heat exchanger A and heat exchanger B which are connected in series, and the flowing directions of carbon dioxide working media in the heat exchanger A and the heat exchanger B are opposite to the flowing directions of media in the heat storage system and the cold storage system; the heat storage system exchanges energy with a carbon dioxide working medium in the energy storage closed circulation system through a heat exchanger A and a heat exchanger B; the heat storage system exchanges energy with the carbon dioxide working medium in the energy release closed circulation system through the heat exchanger A and the heat exchanger B. The energy storage system can meet the energy storage construction requirements under diversified scenes such as the power supply side, the power grid side and the user side. The method can adapt to energy storage construction requirements in diversified scenes such as a power supply side, a power grid side and a user side.

The utility model relates to a sludge drying system coupled with a heat storage system. The sludge drying system comprises a heat storage module, a sludge drying module, a waste heat collecting module and a waste heat upgrading module, the heat storage module is used for storing peak regulation steam energy of the power plant; the sludge drying module is connected with the heat storage module, comprises a plurality of drying machines which are connected in parallel, and is used for drying sludge by utilizing low-pressure steam; the waste heat collecting module is connected with the sludge drying module and is used for recycling high-temperature waste gas waste heat; the waste heat quality improving module is connected with the waste heat collecting module and used for improving the quality of the waste heat and recycling the waste heat. The utility model has the beneficial effects that the drying technology is coupled with a boiler system, so that steam energy which is difficult to store is converted into storable and combustible fuel, the deep peak regulation of a power plant is facilitated, the scale of a heat storage system is reduced, and the economical efficiency of the system is improved.

The invention discloses a new energy, hydrogen production and decarburization coupling heat storage system and a control method. The system comprises a new energy power unit, an electrolytic hydrogen production unit, a hydrogen storage unit, an industrial decarburization unit and a heat storage unit. New energy electric power is used for electrolytic hydrogen production and industrial decarburization, and residual electric energy is converted into heat energy to be stored; heat generated in the electrolytic hydrogen production process and the hydrogen storage process is conveyed to the heat storage unit; the heat storage unit provides hydrogen release heat for the hydrogen storage unit and provides adsorbent regeneration heat for the industrial decarburization unit. According to the control method, system operation is divided into an energy storage mode, a balance mode and an energy release mode by collecting system operation data in real time, heat energy distribution of a heat storage unit is dynamically adjusted based on a fuzzy PID algorithm, and rapid heat self-consistent response of a hydrogen storage unit, stable regenerative heat supply of a decarburization unit and efficient consumption of new energy power are achieved. Through multi-unit coupling and heat energy gradient utilization, the overall energy utilization efficiency of the system is improved.

The invention discloses a double-medium heat storage type gas-steam combined cycle combined heat and power generation unit which comprises a gas turbine power generation system, a waste heat boiler system, a steam turbine power generation system, a flue gas bypass baffle, a fused salt heat storage system, a water heat storage system, a heat storage water feeding pump and the like. In the off-peak period of power utilization of a power grid, the double-medium energy storage system firstly stores exhaust heat of a gas turbine, the effect that a steam turbine is reduced to the minimum load and even stops running is achieved, then residual on-grid electric quantity heat of a unit is stored, and the double-medium energy storage system releases heat and generates steam to supply industrial steam extraction of the unit while storing heat; in the peak period of power utilization of the power grid, the double-medium energy storage system releases heat and generates steam to supply industrial steam extraction of the unit and extrudes steam extraction of the original unit, and the original steam turbine generates power at the peak. A flexible and efficient combined heat and power generation mode is provided, the problems that a gas-steam combined cycle combined heat and power generation unit is low in heat supply energy efficiency and serious in loss in the power utilization trough period of a power grid are solved, and the operation flexibility of the unit is improved.

The invention belongs to the technical field of coal-fired power generation, and particularly relates to a Carnot battery system based on a coal-fired power generation unit and an operation method of the Carnot battery system. The Carnot cell system comprises a heat pump system taking supercritical carbon dioxide as a working medium, a heat storage system and a coal-fired power generation system; the heat pump system comprises a first compressor, a second compressor, a first heat regenerator, a second heat regenerator, a third heat regenerator, a first turbine and a second turbine; the heat storage system comprises a hot tank and a cold tank; the coal-fired power generation system comprises a coal-fired boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a condenser, an eighth low-pressure heater, a seventh low-pressure heater, a sixth low-pressure heater, a fifth low-pressure heater, a deaerator, a first high-pressure heater, a second high-pressure heater and a third high-pressure heater. The split-flow compression process and the split-flow expansion process are matched with the multi-stage heat regenerator and the multi-stage fused salt heater, the energy efficiency coefficient of the Carnot battery in the electricity-to-heat conversion process is improved, and therefore the round-trip efficiency of the Carnot battery is improved.

The invention discloses a photo-thermal energy storage system, and relates to the technical field of photo-thermal energy storage, and the photo-thermal energy storage system is characterized in that a phase change substance is arranged in an energy storage box, a heat exchange flow path penetrates through the energy storage box and is in heat exchange cooperation with the phase change substance, a cooling device comprises a heat exchange shell and a water absorption gel plate, and a solar photovoltaic panel abuts against the heat exchange shell. A mounting cavity is defined by the heat exchange shell, the heat exchange shell is provided with a first wall part and a second wall part which are opposite, a mounting cavity outlet is formed in the first wall part, a mounting cavity inlet is formed in the second wall part, and the two ends of the heat exchange flow path are connected with the mounting cavity outlet and the mounting cavity inlet correspondingly to form a circulating flow path; the water absorption gel plate is arranged in the mounting cavity and abuts against the heat exchange shell, and a steam space is formed between the first wall part and the water absorption gel plate. The heat of the solar photovoltaic panel is absorbed through the water absorption gel plate, and the heat exchange flow path is matched with the phase change material in a heat exchange manner, so that the working efficiency of the solar photovoltaic panel and the solar energy utilization rate can be improved, and energy conservation and emission reduction are facilitated.

A thermal energy storage (TES) system converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. Configurations of simple cycle systems and combined cycle power plants using thermal energy storage units can provide even greater efficiency and responsiveness.

The invention belongs to the technical field of energy storage devices, and particularly relates to an electromagnetic induction heating fluidized bed, a heat storage and energy storage system and a heat exchange method of the fluidized bed. The electromagnetic induction heating coil is arranged on the fluidized bed body and is used for heating a heat storage material in an inner cavity of the fluidized bed body; the cooling gas circuit passes through the electromagnetic induction heating coil, the cooling gas circuit is used for cooling the electromagnetic induction heating coil, and an outlet of the cooling gas circuit is communicated with an inner cavity of the fluidized bed body. Heat storage materials in the inner cavity of the fluidized bed body can be heated, Joule heat generated by the electromagnetic induction heating coil is fully utilized, natural heat which is absorbed by the electromagnetic induction heating coil and comes from the fluidized bed body is recycled, and the overall energy utilization efficiency of the heat storage system is improved.

The utility model discloses a compressed air energy storage power station constant pressure heat storage system which comprises a heat storage module, a circulation heat exchange module, a buffer water supplementing module and a nitrogen filling module, the heat storage module comprises a plurality of heat storage tanks, the heat storage tanks are all communicated with the nitrogen filling module, the circulation heat exchange module comprises a heat exchanger, and the heat exchanger is communicated with the buffer water supplementing module. A circulating pipe a and a circulating pipe b are arranged at two ports of a channel on one side of the heat exchanger respectively and are communicated with the heat storage tank in an opening and closing mode, the buffer water supplementing module comprises a buffer tank, a water supplementing pipe and a water returning pipe which are communicated with the buffer tank are arranged on the buffer tank, and the water supplementing pipe and the water returning pipe are communicated with the heat storage tank in an opening and closing mode. Compared with the prior art, on the premise that no heat loss exists, system pressure fluctuation can be effectively restrained, resource waste caused by loss of constant-pressure media (such as nitrogen) can be avoided, and popularization and application of the high-heat energy storage technology are greatly promoted.

The invention relates to the technical field of nuclear energy comprehensive utilization, and discloses an energy system with nuclear energy as base load and a control method.The system comprises a nuclear power secondary loop system, a renewable energy system, an energy storage system, a steam supply system, a seawater desalination system, a hydrogen production system, a heating system and a refrigeration system; the heat of the reactor core enters the steam generator to generate main steam; the photovoltaic module and the wind turbine generator set carry out renewable energy power generation; a storage battery is used for storing renewable energy electric power, and a molten salt heat storage system is used for storing heat energy; the steam supply heat exchanger is used for heating fresh water produced by the seawater desalination system to obtain superheated steam; the low-temperature multi-effect evaporation system and the reverse osmosis membrane method seawater desalination system generate fresh water; the electrolytic bath generates hydrogen and oxygen; the heating system and the refrigerating system are used for refrigerating in summer and heating in winter, and nuclear energy, wind energy, solar energy and the like are coupled and utilized in a stepped mode.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The present invention discloses a heat exchange and enhanced heat storage system using a heat pipe, which relates to the field of variable heat storage technology, and includes an evaporation module, which is used for a liquid working medium to absorb heat and evaporate into a gaseous state to achieve heat transfer; a cooling module, which is used to achieve condensation of the gaseous working medium to achieve heat release; a conversion module, which is used to promote the circulation of the working medium in the system to achieve heat absorption and release; a monitoring module, which automatically adjusts the air flow and working medium circulation according to temperature changes; a liquid storage module: used to store liquid refrigerant to achieve refrigeration system cyclic operation; a phase change heat transfer module: used to store phase change materials. The present invention allows the system to operate flexibly under different heat load conditions and adapt to different cooling and heating requirements through the coordination between the cooling module, the evaporator and the conversion module, thereby improving the heat conduction efficiency and ensuring the overall energy storage and release efficiency.

The invention discloses a comprehensive energy optimization scheduling method considering combustion of gas turbines with different hydrogen doping ratios, and belongs to the technical field of gas turbines, and the method comprises the steps: constructing a source-network-load-storage integrated combined cooling heating and power comprehensive energy system which covers an energy production layer, an energy conversion layer, an energy storage layer and an energy consumption layer; wherein in the energy consumption layer, electric load is supplied by gas turbine power generation, wind and light direct supply and energy storage discharge in a combined mode, heat load is borne by gas turbine waste heat, a gas-fired boiler and a heat storage system together, the coverage rate of a sensitive area is increased through the ergodicity of a chaotic system, population aggregation is avoided through initial value sensitivity, and it is ensured that all optimization schemes cover a key decision interval; meanwhile, in the algorithm evolution process, through a self-adaptive crossover variation mechanism, early enhancement of sensitive area exploration to capture efficiency inflection points and later fine development and positioning of an optimal solution, the problem of key solution omission of a traditional algorithm is thoroughly solved, and a more accurate hydrogen doping ratio reference is provided for system operation.

A gas turbine generator system configured to be electrically interconnected to an electrical grid via a first circuit breaker. The gas turbine generator system includes a compressor configured to output a pressurized gas flow to an electrically heated thermal energy storage system which outputs a heated and pressurized gas flow to a gas turbine to cause the gas turbine to rotate and drive an electrical generator. The electrical generator outputs electric power to the electrical grid via the first circuit breaker, operating in a normally closed position. There is a controller to detect an opening of the first circuit breaker and to close a first switch, in response to the opening of the first circuit breaker. The first switch is connected to the output of the electrical generator and to the electrical input of the electrically heated thermal energy storage system, connecting the generator to the thermal energy storage system.

An energy storage system converts variable renewable electricity (VRE) to continuous heat. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Low temperature waste heat from energy production can be recovered and used to improve overall system efficiency.

The invention relates to a fused salt heat storage technology in a spinning process, in particular to a fused salt heat storage system based on electricity price adjustment and a control method.The fused salt heat storage system comprises a fused salt pipeline, a steam pipeline and a nylon pipeline, and the fused salt pipeline is provided with a fused salt storage tank, an electric heater, a first circulating pump, a heat exchanger and a second circulating pump; a third circulating pump is arranged on the steam pipeline; a screw extruder, a spinning machine and a steam sleeve are arranged on the nylon pipeline; the electric power demand in the peak period is remarkably reduced, the pressure of an electric power system in the peak period is relieved, the social benefit is remarkable, fused salt heat storage and heating are combined together, and the working efficiency is improved.

The invention relates to the field of hydrogen energy storage and supply, and discloses a heat storage system for a hydrogen supply and storage system, comprising: a storage and supply integrated water tank for storing waste heat generated by a fuel cell generator set; the waste heat recovery side water pump is used for conveying waste heat of the fuel cell generator set to the storage and supply integrated water tank; the user water supply side water pump is used for extracting heat from the storage and supply integrated water tank and supplying the heat to rear-end users; the pipeline and valve group is used for connecting all the parts and adjusting the flowing direction and flow of heat; the gradient utilization module is used for graded utilization of waste heat generated in the hydrogen supply and storage process; and the collaborative conversion module is used for carrying out collaborative conversion and storage among the energy sources. An energy demand is predicted by applying a deep hydrogen energy storage and supply Q hydrogen energy storage and supply network algorithm, an optimization model is constructed in combination with equipment operation constraints, equipment is accurately regulated and controlled, and the energy demands are respectively used for power generation, refrigeration, heating and industrial production according to waste heat temperature differences, so that flexible distribution of waste heat is realized.

A gas and steam power generation afterburning type heat-electricity decoupling system and a working mechanism thereof, characterized in that the system comprises a gas turbine power generation system, a power transmission and transformation system, a molten salt heat storage system and a steam power generation system; the gas turbine power generation system is connected with the molten salt heat storage system through a flue gas pipeline; the molten salt heat storage system is connected with the power transmission and transformation system through a cable; the gas turbine power generation system is connected with the power transmission and transformation system through a cable; the molten salt heat storage system is connected with the steam power generation system through a main steam pipeline and a backwater pipeline; and the steam power generation system is connected with the power transmission and transformation system through a cable. The system can realize complete heat-electricity decoupling in a green energy storage system, realize the functions of self-supply of external power, storage of green electricity or heat supply, increase the accommodation capacity of a power grid to green electricity, and enhance the stability, flexibility and safety of a new power system.

The invention relates to the technical field of intelligent control, in particular to a solar heat collection and storage system with an intelligent regulation and control function, which comprises a heat collection state recognition module, a hot-pressure fluctuation diagnosis module, a branch switching control module, a slow start path regulation and control module and an energy supply analysis module. According to the method, by analyzing the synchronous relation between the heat conduction liquid temperature rise trend and the thermal inductance state, the stable characteristics of heat collection response are recognized, the matching precision of heat source output and liquid conduction is improved, the path pressure fluctuation and the heat input period change are combined, main circulation abnormity is recognized in advance, and rapid replacement of a standby path is assisted to be completed; segmented conduction and heat removal operation ensures flow continuity, enhances heat flow conduction efficiency, crosswise judges a heat supply channel and a heat storage state, realizes linkage optimization of path selection and heat source scheduling, and improves response coordination, operation stability and heat energy utilization efficiency of the system under multiple working conditions.

An electrically conductive ceramic-metal composite brick is formed of a Cr2O3 containing ceramic material into which is incorporated metallic chromium agglomerates having a melting temperature in excess of 1300 C, in some instances in excess of 1500 C. The ceramic-metal composite brick can be incorporated into an electrically heated thermal energy storage system or a resistive heating system as one or both of a heating element and an electrode.

The invention discloses a heat supply system for mine building heat supply and shaft freezing prevention, comprising: a heat collection module for collecting heat by using solar energy; the heat storage module exchanges heat with the heat collection module, is used for storing the heat source transferred by the heat collection module and can transfer the heat source to a heat terminal for the mining area building for heating around the clock; the power supply module is used for generating power by using solar energy and storing electric energy; and the wellhead heating modules are arranged at the shaft positions of the main inclined shaft and the auxiliary inclined shaft, and heat exchange is conducted between the wellhead heating modules and the heat storage module. The water source heat pump is used for heating the main inclined shaft and the auxiliary inclined shaft, comprehensive utilization of energy is achieved, a photovoltaic renewable power source is built in combination with the mining area space to provide clean power for mining area heat supply and power utilization systems such as the water source heat pump, and when the mining area power load and the heating load are low in the non-heating season, the water source heat pump can be used for heating the heat storage system. Zero-carbon heat supply for mine area building heat supply and shaft freezing prevention is achieved.