253 results about "Liquid air" patented technology

The invention relates to a liquid air energy storage and terrestrial heat coordinated underground space air regulation and control system and method. Comprising a first-stage compressor, a second-stage compressor, a third-stage compressor, an expansion refrigerator, a first-stage compression heat exchanger, a second-stage compression heat exchanger, a third-stage compression heat exchanger, a cold box, a separator, a liquid air storage tank, a cryogenic pump, an evaporator, a cold storage circulating pump, a cold storage box, a compression heat exchange circulating pump, a compression heat storage box, a first heater, a second heater and a third heater. The system comprises a first air expander, a second air expander, a third air expander and a generator. The regeneration heater is used for guiding the compression heat generated by the compressor into the regeneration heater for regeneration and / or guiding the geothermal energy output by the geothermal energy output end into the regeneration heater for regeneration; the rotary wheel dehumidification device is used for performing cryogenic drying on the wet air; the fresh air processing unit is composed of a fresh air filter, a regeneration fan, a regeneration filter and an air supply fan.

The invention discloses a solid-phase and liquid-phase double-coupled liquid air energy storage and cold storage system. Comprising an air liquefaction storage module used for cooling, liquefying and storing compressed air, a liquid phase cold storage / release module used for storing and releasing high-quality cooling capacity of liquid air, and a solid phase cold storage / release module used for storing and releasing medium-low-quality cooling capacity of the liquid air. The liquid phase cold storage / release module and the solid phase cold storage / release module are connected to the rear end of the air liquefaction storage module in series, and heat exchange is conducted between the liquid phase cold storage / release module and the air liquefaction storage module and between the solid phase cold storage / release module and the air liquefaction storage module. And an outlet pipeline of the solid-phase cold storage / release module is connected to the heater. High-quality cooling capacity in the power generation process of the liquid air energy storage system is stored in a liquid-phase cold storage mode, medium-low-quality cooling capacity in the power generation process of the liquid air energy storage system is stored in a solid-phase cold storage mode, the defect of large exergy loss caused by solid-phase cold storage is overcome, and the cold storage efficiency of the energy storage system is improved.

The invention discloses a mine local ventilation and cooling system and method based on liquid air, and relates to the technical field of mine environment control, and the mine local ventilation and cooling system comprises an intelligent conveying pipeline, an intelligent multi-mode release device, an air purification and energy recovery device and a mine environment self-adaptive monitoring and control system; the intelligent conveying pipeline comprises a multi-layer composite heat insulation structure and an intelligent control module, and the intelligent control module comprises a temperature sensor, a pressure sensor and a flow sensor and is used for monitoring and adjusting the conveying state of liquid air in real time. The intelligent multi-mode release device comprises an intelligent release device with plasma vaporization, ultrasonic nanometer atomization and vortex synergistic functions, through the steps of the intelligent multi-mode release device, efficient conversion and accurate distribution of liquid air from storage to a working face are achieved, the airflow speed and direction are adjusted in real time according to mine environment parameters, and the intelligent multi-mode release device has the advantages of being simple in structure and convenient to use. The uniform distribution and local cooling effect of fresh air are ensured, and the air quality of an operation area is improved.

The invention discloses a liquid air energy storage system based on air separation, which is characterized by comprising an air purification unit, an energy storage unit, an air rectification unit and an LNG (Liquefied Natural Gas) cold supply unit, wherein the air purification unit comprises an air filter, an air compressor, a first cooler, an adsorber and a first heater, and the energy storage unit comprises a first liquid separation tank, a liquid air storage tank, a liquid air pump and an air expansion machine. The air rectification unit comprises a rectification tower, a main cold box, a second liquid separation tank, a second subcooler, a first heat exchanger, a liquid nitrogen storage tank, a liquid oxygen storage tank, a second heat exchanger, an argon rectification system and a liquid argon storage tank; and the LNG cold supply unit comprises a first nitrogen supercharger, a second nitrogen supercharger, an LNG cold box and a first subcooler. The system has the functions of air separation and electric energy storage at the same time, and cold energy of the LNG receiving station is fully utilized for air separation and energy storage to participate in construction of a novel power system of a power grid.

The invention relates to the technical field of plant-level monitoring systems, in particular to a multi-source heterogeneous system and method for plant-level monitoring based on liquid air energy storage. According to the technical scheme, the method comprises the following steps of S1, collecting and preprocessing multi-source heterogeneous data in real time; s2, constructing a cross-system equipment graph; s3, formulating a hierarchical response intelligent strategy; s31, making a topological graph; s32, according to a hierarchical response strategy, dynamic adjustment is carried out according to the severity degree and the propagation range of the alarm; s33, calculating a weight; and S34, dividing response levels according to the weights. Multi-source heterogeneous data real-time acquisition and preprocessing can align millisecond-level and second-level data streams and eliminate time sequence errors, so that the system alarm association accuracy is improved, six system data formats are unified through JSON structured conversion, the analysis error rate can be reduced, and a basis is provided for large-scale monitoring; a three-flow topology model is established, a key equipment network is constructed, the root cause positioning time is shortened, and the false alarm rate is reduced through a topology weight optimization mechanism.

The utility model discloses a drive rake with a gearbox oil air-cooled radiator, which comprises a drive rake and an air-cooled radiator, a portal frame is mounted on a casing of the drive rake through a lower hanger, a support plate is mounted at the rear end of the portal frame, the air-cooled radiator is mounted on the support plate, a gear pump is mounted on the casing of the drive rake, and the gear pump is mounted on the casing of the drive rake. The air cooling radiator, the gear pump and a gearbox of the driving rake are communicated with one another; and the gear pump is matched with a gearbox of the driving rake. By arranging the gear pump and matching the gear pump with the gear box of the driving rake through the gear, the driving of the gear pump can be realized on the premise that other external driving equipment is not needed. Due to the fact that the liquid paths of the gear pump, the gear box and the air cooling radiator are communicated, oil liquid circulation in the gear box can be achieved, and high-temperature oil liquid in the gear box can be actively cooled.

The utility model discloses a liquefied air energy storage system which comprises a molecular sieve water separator and a molecular sieve adsorption tower, a separator air output pipe is connected with a top gas connecting pipe of the molecular sieve adsorption tower, and a bottom gas connecting pipe of the molecular sieve adsorption tower is connected with a cold box front compressor unit. The cold box front compressor unit is communicated with an air pipeline in the cold box, and an outlet of the air pipeline in the cold box is communicated with a first liquefied air storage tank through a first liquefied air output pipe with a first throttling valve; the output end of a liquid air pressure pump on a first liquefied air storage tank output pipe of the first liquefied air storage tank is communicated with the air input end of the expansion unit, the air output end of the expansion unit is provided with a hot blowing conveying pipe and a cold blowing conveying pipe, and the hot blowing conveying pipe is communicated with a bottom gas connecting pipe through a first heater and an electric heater; and the output end of the cold blowing gas conveying pipe is connected to the output end of the electric heater output pipe. The device has the advantages of simple structure, low energy consumption and full utilization of heat energy.

The invention belongs to the technical field of LNG (liquefied natural gas) cold energy utilization, and provides an LNG gasification station cold energy utilization system coupled with liquid air energy storage, which comprises a first LNG heat exchange assembly, a second LNG heat exchange assembly and a third LNG heat exchange assembly, the second LNG heat exchange assembly comprises a second heat exchange subsystem, and a cold source and a heat source of the second heat exchange subsystem are LNG and power plant warm discharged water correspondingly; the ORC power generation assembly comprises a sixth heat exchanger and a first turbine generator, a cold source of the sixth heat exchanger is LNG, the LNG is output through an LNG outlet of the sixth heat exchanger, and a driving medium flowing part is arranged between a propane outlet of the sixth heat exchanger and the first turbine generator; and the air energy release assembly comprises a liquid air storage tank, and the output end of the liquid air storage tank communicates with a power generation mechanism. Liquefied air energy storage is conducted through LNG, meanwhile, the ORC cold energy power generation system is coupled, LNG cold energy is efficiently recycled, and self-generation and self-use of electric power are achieved.

The utility model discloses a liquid air energy storage system coupled with air separation and dry ice preparation, which comprises an air compression liquefaction subsystem, a cold energy gradient utilization subsystem, an air expansion power generation subsystem and a heat storage subsystem, the air compression and liquefaction subsystem, the cold energy gradient utilization subsystem and the expansion power generation subsystem are sequentially connected through a compression and liquefaction pipeline and an expansion power generation pipeline, and the heat storage subsystem is connected with the air compression and liquefaction subsystem and the air expansion power generation subsystem through a heat storage circulation pipeline. The cold energy gradient utilization subsystem is arranged to replace an existing low-temperature cold storage unit, the liquid air energy storage system is coupled with the air separation unit and the dry ice preparation unit, liquid air cold energy gradient utilization is achieved, and meanwhile energy consumption and construction cost of the air separation system are reduced. The power generation stability of the liquid air energy storage system is guaranteed, and the comprehensive efficiency and the environmental protection property of the liquid air energy storage system are improved.

A coupling system for liquefied natural gas re-gasification and liquid air energy storage. The coupling system comprises a liquefied natural gas re-gasification system and a liquid air energy storage system. The liquefied natural gas re-gasification system comprises: a heat exchanger-natural gas (HX-NG) connected to a liquefied natural gas re-gasification path. The liquid air energy storage system comprises: a heat exchanger-charge (HX-C) connected to a main gas liquefaction path, a heat exchanger-discharge (HX-DC) connected to a liquefied main gas re-gasification path, and a cold dewar (CD), wherein a first heat exchange cycle where cold energy exchange is performed with a first heat exchange medium is formed between the heat exchanger-natural gas and the heat exchanger-charge; and a second heat exchange cycle where cold energy exchange is performed with a second heat exchange medium is formed among the heat exchanger-charge, the cold dewar and the heat exchanger-discharge. In the first heat exchange cycle, a hot end of the heat exchanger-natural gas is connected to a hot end of the heat exchanger-charge, and a cold end of the heat exchanger-natural gas is connected to a cold end of the heat exchanger-charge; and in the second heat exchange cycle, hot ends of the heat exchanger-charge, the cold dewar and the heat exchanger-discharge are connected, and cold ends of the heat exchanger-charge, the cold dewar and the heat exchanger-discharge are connected. In the present invention, regardless of whether the liquid air energy storage system is in a charging working state, a standing working state or a discharging working state, effective coupling utilization of cold energy and heat energy between the liquid air energy storage system and the liquefied natural gas re-gasification system can be realized, improving the effective coupling utilization rate of cold energy and heat energy between the systems.

The invention relates to the technical field of energy storage and comprehensive utilization, in particular to an equipment reuse type liquid air energy storage system and method for combined cooling and power, the system comprises a compression unit, a cold storage unit, an organic Rankine cycle unit, a heat storage unit and an expansion unit, and the system operation is divided into an energy storage stage and an energy release stage. In the energy storage stage, after the environment air is subjected to multi-stage compression, LNG high-grade cold energy is used for assisting liquefaction and storage, medium-grade cold energy drives ORC cycle power generation, and low-grade cold energy precools and compresses inlet air according to needs; and in the energy release stage, liquid air is gasified to drive ORC cycle and an expansion machine to generate power, the cold energy is recycled by the cold storage unit, and the reversible heat exchanger group realizes reuse of interstage cooling and heating functions. Through LNG cold energy gradient utilization, equipment function integration and multi-system cooperation, the problems of equipment redundancy, low efficiency and high cost of an existing system are solved, the comprehensive energy utilization rate and the system stability are improved, and electricity-cold-gas multi-energy combined supply is achieved.

The invention provides a constant-pressure energy storage system and a constant-pressure expansion power generation method. Comprising a first-stage compressor motor, a first-stage compressor, a second-stage compressor motor, a second-stage compressor, a high-pressure cylinder, a low-pressure cylinder, a generator, an exhaust funnel, a hot water storage tank, a cold water storage tank, a compressed air condenser, a ground pipeline steel gas storage, a hot water storage pump, a cold water storage pump, a liquid air booster pump, an air inlet cooler, a first-stage cold water storage heater and a first-stage air cooler. The system comprises a first-stage gas-water separator, a second-stage cold water storage heater, a second-stage air cooler, a second-stage gas-water separator, a second-stage hot water storage cooler, a first-stage hot water storage cooler, a seawater preheater, a seawater heater, a compressor outlet shut-off valve, a pressure stabilization regulating valve and a liquid air supply valve. The air storage device is miniaturized, cold energy is efficiently utilized, and the system efficiency is improved.

The invention relates to the technical field of concrete materials, in particular to a formula of plateau high-cold high-speed railway bridge pier column anti-crack concrete which comprises the following components: 280-320 kg / m < 3 > of Portland cement, 80-100 kg / m < 3 > of mineral powder, 60-80 kg / m < 3 > of coal ash, 800-850 kg / m < 3 > of machine-made sand with the fineness of 2.6-3.0, 900-1000 kg / m < 3 > of broken stone, 140-160 kg / m < 3 > of water and 4.0-5.0 kg / m < 3 > of polycarboxylic acid water reducing agent. The total use amount of the retarding components in the water reducing agent is 0.8-1.2 kg / m < 3 >, the air entraining agent comprises triterpenoid saponin and a liquid air entraining agent, the total use amount is 0.02-0.05 kg / m < 3 >, and the use amount of the polypropylene fiber is 0.9-1.2 kg / m < 3 >. Through a low water-binder ratio, a composite gelling system, fiber reinforcement and seasonal regulation and control composite admixture technology, the compressive strength, crack resistance and freeze-thaw resistance are remarkably improved, and the composite admixture is suitable for bridge engineering in plateau alpine regions.

The invention discloses a liquid air energy storage and low-temperature air separation combined system and method, which comprises an air compression subsystem, an air purification subsystem, a heat storage subsystem, a liquid gasification subsystem, a cold storage subsystem, an energy release power generation subsystem, a low-temperature air molecular system and a central cooperative control module, the air compression subsystem is composed of multiple sections of compressor units, an interstage cooler and related pipeline valves, and the interstage cooler is connected with the heat storage subsystem. According to the low-temperature air separation system, high-energy-consumption compression expansion equipment does not need to be independently built in a matched mode, the investment cost of the system is greatly reduced, and the low-temperature air separation system can achieve air separation production only through air raw materials continuously provided by the liquid air energy storage system and cold energy supply; compression power consumption in a traditional low-temperature air separation system is greatly reduced, and meanwhile waste of compression heat energy is reduced.

The invention discloses an air liquefaction and energy comprehensive utilization system, which relates to the technical field of air liquefaction and utilization, and comprises an air compression unit, an air liquefaction unit, a liquid air energy storage unit, an energy release power generation unit, a heat storage unit, a cold storage unit and an optimization control unit, the air compression unit sucks and compresses ambient air, and then cools the air. Through close cooperation and efficient operation of all the units, the system achieves efficient compression, liquefaction, storage and energy release of air, the utilization efficiency of energy is greatly improved, the storage and energy release process of liquid air provides flexible energy dispatching capacity for the system, stable power output can be provided at the demand peak, and meanwhile, the system has the advantages that the energy utilization efficiency is improved. Due to the arrangement of the heat storage unit and the cold storage unit, the energy comprehensive utilization efficiency of the system is further improved, waste heat in the compression process and the cooling capacity in the liquefied air gasification process are recycled and reused, energy waste is reduced, and the operation cost of the system is reduced.

Pure liquid nitrogen, liquid air or dirty liquid nitrogen generated by a rectifying tower of the air separation device is subjected to secondary pressurization through a hydraulic pump and then enters a main heat exchanger or a recooling device to recover cold energy, and high-pressure gas formed by heat absorption and gasification enters a high-pressure expansion machine to expand and do work; exhaust gas of the high-pressure expansion machine enters the rectifying tower to provide cold energy required by air separation, and pure nitrogen, waste nitrogen and pure oxygen which are discharged from the rectifying tower and are subjected to cold energy recovery through the main heat exchanger are output. The purposes of energy conservation and consumption reduction of the air separation device are achieved through the processes of primary pressurization of the compressor, secondary pressurization of the hydraulic pump, cold returning, gasification and expansion.

A virtual power plant low-carbon economic dispatching method considering cooperation of hydrogen energy storage and liquid air energy storage comprises the steps that firstly, a hydrogen energy storage model is established, hydrogen energy serves as extension of the electricity-to-gas technology, and part of natural gas is replaced with the electricity-to-hydrogen and hydrogen gas turbine technology; secondly, establishing a liquid air energy storage (LAES) model, and stabilizing the output fluctuation of the unit by using the high-capacity and long-period electricity storage and discharge capability of the LAES model; and finally, hydrogen energy storage and liquid air energy storage are brought into an overall optimization scheduling framework, an electricity-gas-heat-hydrogen multi-energy complementary virtual power plant (VPP) model is constructed, and an improved mixed grey wolf optimization algorithm is used for solving. According to the invention, various energy conversion and energy storage devices are coupled, and wind power and photovoltaic power can be flexibly scheduled in a cross-time manner and fully utilized through joint optimization scheduling, so that collaborative optimal configuration of internal multi-energy resources is realized, the operation cost of the system is reduced, and carbon emission is reduced.

The present invention relates to a cold-electricity integrated utilization system based on energy coupling, comprising: an LNG receiving station, wherein LNG is gasified into natural gas after being utilized for cold energy by a cold energy power generation and refrigeration system, a liquid air energy storage system, a cold energy air separation system, and a light hydrocarbon separation system. The natural gas then enters the natural gas pipeline network, the gas-fired power generation system, and the natural gas hydrogen production system; the cold energy power generation and refrigeration system utilizes cold energy to generate electricity for self-use within the plant area, with excess electricity transmitted to the power grid, while also producing refrigerated products; the liquid air energy storage system utilizes cold energy to generate electricity for self-use within the plant area, with excess electricity transmitted to the power grid; the cold energy air separation system utilizes cold energy to produce liquid oxygen, liquid nitrogen, and liquid helium; the light hydrocarbon separation system utilizes cold energy to produce ethane and LPG products; the gas-fired power generation system utilizes natural gas to generate electricity and transmits it directly to the power grid; and the natural gas hydrogen production system utilizes natural gas to produce hydrogen. The present invention can be widely applied to the field of LNG cold energy utilization technology.

The invention provides a liquefied air energy storage system coupled with LNG cold energy Rankine cycle power generation, and particularly relates to the technical field of liquefied air energy storage. During charging, an LNG cold source enters the first heat exchange side of the first LNG heat exchanger, the first heat exchange side of the third LNG heat exchanger and the second LNG heat exchanger, the first heat exchange side of the second LNG heat exchanger exchanges heat with air and cools the air, during discharging, the LNG cold source enters the first heat exchange side of the cold energy power generation condenser, and the second heat exchange side of the second LNG heat exchanger exchanges heat with the air and cools the air. Liquefied air in the cold energy power generation condenser and LNG jointly provide cold energy and generate power, the LNG cold source enters different heat exchangers for heat exchange during discharging and charging, the LNG cold source and the heat exchangers operate independently and do not interfere with each other, the utilization rate of LNG cold energy can be increased, and the efficiency of the liquid air energy storage system is further improved.

The application discloses a helium low-temperature purification pressure building device and a pressure building method, which comprise a flash evaporation unit, a purification unit and a heat recovery unit connected in sequence. In the application, the product gas of the liquid air separator is used to build pressure for the adsorber under the regeneration pressure building in the high-pressure working state, so that the adsorber under the working state is prevented from charging pressure for the adsorber under the regeneration pressure building and the pressure of the adsorber under the working state is prevented from being lost. Since the pressure difference between the liquid air separator and the adsorber under the regeneration pressure building is large, the high-pressure impact is easy to cause the damage of the equipment, the pressure building process is arranged in the purification process, the time required for the pressure building is reduced, the adsorber under the working state is saturated, the adsorber under the regeneration state is built in pressure, automatic switching can be realized, the continuous production of the product high-purity helium gas is realized, and the use demand of the high-purity gas is met.

The invention discloses a multifunctional air separation device for preparing liquid oxygen by liquefying air and nitrogen through a liquid oxygen self-pressurization evaporator and pouring liquid nitrogen backwards. Comprising an air filtering and compressing system, a pre-cooling system, an air purifying unit, a main heat exchanger, a liquid oxygen evaporator, a low-pressure expansion machine, a rectifying tower, a liquid air and liquid nitrogen subcooler, a high-purity oxygen tower, an argon extracting system, a medium-pressure nitrogen pipe network, a liquid oxygen pipe network, a nitrogen liquefier, a heat exchanger I and a gas-liquid separator, the output of the liquid oxygen evaporator is provided with a pressure oxygen pipeline, the pressure oxygen pipeline exchanges heat through the main heat exchanger and then is output and stored, the output of the bottom of the liquid oxygen evaporator is provided with a product liquid oxygen pipeline, the medium-pressure nitrogen pipe network is output to the nitrogen liquefier through the heat exchanger I, the input of the liquid oxygen pipe network is connected with the nitrogen liquefier, and the nitrogen liquefier is connected with the gas-liquid separator. The hydrogen-free argon production process and the oxygen external compression mode are adopted, the liquid oxygen self-pressurization function is achieved, air and nitrogen are liquefied, and the multifunctional characteristic is achieved.

A liquid air energy conversion system is provided that integrates three subsystems or unit operations, namely a deep sub-ambient gas compression subsystem, a power expansion and heat recovery subsystem, and an external heat source.

The utility model discloses double-tower backflow high-nitrogen and high-purity oxygen air separation equipment which comprises a cold box, a main heat exchanger, a first upper tower and a first lower tower, the cold box is connected with a gas inlet pipe, one end of the gas inlet pipe is arranged in the cold box, the gas inlet pipe penetrates through the main heat exchanger and is connected with the bottom of the first lower tower, and a second lower tower is installed on the upper portion of the first lower tower. A first main condensation evaporator is installed in the second lower tower, the side wall of the top of the first lower tower is connected with the input end of the first main condensation evaporator through a pipeline, a first backflow pipe is installed at the output end of the second main condensation evaporator, one end of the first backflow pipe is connected with the side wall of the top of the first lower tower, and an output pipe is further installed between the second lower tower and the first upper tower. A second upper tower and an oxygen tower are sequentially installed on the top of the first upper tower, a second liquid air pipe is installed on the side wall of the bottom of the first upper tower, and the end, away from the first upper tower, of the second liquid air pipe is connected with the oxygen tower. The problems that existing equipment cannot produce pure oxygen and pure nitrogen at the same time, and the production cost is high are solved.

The invention provides a charge and discharge control method and system for a liquid air energy storage ship based on a neural network, and relates to the technical field of energy storage ships, and the method comprises the steps: generating a control instruction of a corresponding link based on a final time node decision outputted by a neural network model; executing the control instruction, namely controlling the open sea liquefied air equipment to start or stop liquid air preparation at the final preparation time node; controlling the ship to start navigation at the final transportation start navigation time node; controlling the port gasification power generation device to start or stop power generation at the final energy release power generation time node; and in the process of liquid air preparation, ship transportation or port energy release power generation, monitoring the change of multi-source real-time data in real time, and inputting the changed data into the neural network model again so as to dynamically adjust and update the final time node decision. According to the method, the maximization of the comprehensive benefit of operation is realized, the value window of the peak period of the power grid can be accurately captured and responded, and low-efficiency or invalid discharge is avoided.

The invention provides a liquid air energy storage system based on LNG cold energy utilization and Stirling power generation coupling, and particularly relates to the technical field of energy storage equipment.The liquid air energy storage system based on LNG cold energy utilization and Stirling power generation coupling comprises a cold energy storage unit, an LNG cold energy unit and a cold energy release unit, and when the cold energy storage unit stores energy, the LNG cold energy unit releases the cold energy; the LNG cold energy unit provides cold energy for the cold energy storage unit, when the cold energy release unit releases the cold energy, the LNG cold energy is independently operated for power generation, the cold energy can be better utilized, and higher economic benefits are achieved.

The invention discloses a new energy off-grid green, hydrogen and ammonia production integrated system coupled with liquid-air energy storage and power generation, and relates to the technical field of new energy comprehensive utilization and chemical production. A wind-light-electricity new energy power generation module converts wind energy and solar energy into electric energy, and a liquid air energy storage module stores energy through air compression-liquefaction-expansion; the hydrogen production module utilizes electric energy to electrolyze water to produce hydrogen, the air separation module produces nitrogen and supplies the nitrogen to the ammonia production module, and the ammonia production module reacts hydrogen and nitrogen to synthesize green ammonia. The problems of intermittency and instability of new energy power generation are effectively solved, integrated production of green hydrogen and green ammonia under the off-grid condition is achieved, dependence on traditional energy and external infrastructures is reduced, the production cost and carbon emission are reduced, and the energy utilization efficiency is improved; meanwhile, the circulating system of the ammonia production module improves the utilization rate of raw materials and improves the economic benefits of the system.

The application discloses a kind of solar energy cascade utilization liquid air energy storage system and its operating method, the system includes liquid air energy storage system, photo-thermal power generation system and organic rankine cycle power generation system.In the low valley of electricity and light, photo-thermal power generation system generates electric energy, part is used to drive liquid air energy storage subsystem for supply load.The system uses air liquefaction and expansion cycle to realize energy storage, and converts excess electric energy into liquid air storage.In the peak of electricity, the system releases energy, and produces electric energy by gasification and expansion liquid working medium, and uses photo-thermal heat in the form of series, parallel heat exchange to heat working medium, realizes energy cascade utilization, solves the problem of low efficiency of expander when liquid air releases energy.The system can make full use of the peak shaving potential of liquid air energy storage, organically combines the thermal energy and electric energy of photo-thermal system, is conducive to improving overall energy conversion efficiency, realizes all-weather renewable energy utilization.

The application provides a liquid hydrogen storage and supply system with a valve box, and belongs to the technical field of liquid hydrogen fuel cells.The liquid hydrogen storage and supply system comprises a liquid hydrogen bottle, an internal storage space of the liquid hydrogen bottle being used for storing liquid hydrogen, a valve box, an internal placement space of the valve box being used for placing a delivery pipeline and a valve, the placement space being a vacuum environment, and the storage space and the placement space being communicated through a connecting heat pipe.The liquid hydrogen storage and supply system with the valve box sets the placement space of the valve box as a vacuum environment, so that the internal delivery pipeline and the valve can be simplified as a single-wall structure, the complex layout of a plurality of vacuum pipes and vacuum stop valves is replaced, and the liquid hydrogen delivery process on an automobile is more suitable;the liquid hydrogen storage and supply system meets the requirements of a small space of a whole vehicle, and solves the problems of frost formation of liquid air and a pipe wall caused by the liquid hydrogen pipeline and easy jamming of a low-temperature valve in a deep cooling environment.

The embodiment of the invention discloses a liquid feeding air separation device which comprises a rectifying tower, a liquid feeding device, a liquid feeding device, a liquid feeding device, a liquid feeding device and a liquid discharging device, and the middle of the rectifying tower is provided with a liquid air feeding port; the condensing evaporator is arranged at the bottom of the rectifying tower; wherein liquid air enters the rectifying tower from the liquid air feed port to be rectified, liquid oxygen is obtained at the tower bottom, nitrogen is led out from the tower top of the rectifying tower and led into the condensation evaporator after being pressurized and cooled, liquid nitrogen flowing out of the condensation evaporator is divided into two strands, one strand serves as reflux liquid of the rectifying tower, and the other strand is led out. According to the technical scheme, liquid air is used as feed, nitrogen at the top of the tower is pressurized and cooled and then is introduced into the condensation evaporator, then heat exchange is carried out on the nitrogen and liquid oxygen at the bottom of the rectifying tower, and therefore rectification is achieved, and the air separation equipment with the liquid air as the raw material is provided.

The utility model discloses a liquid air energy storage system coupled with ORC and ARS, and belongs to the technical field of energy storage and utilization. Comprising an air liquefaction circulation loop unit, an air power generation circulation loop unit, an ORC unit and an ARS unit. According to the system, organic Rankine cycle (ORC) and absorption refrigeration (ARS) are firstly coupled to realize waste heat utilization, and on the basis, a circulation process is added to utilize energy stored by purge high-temperature air behind a gas-liquid separator to realize further energy utilization. Compared with a traditional liquefied air energy storage system, loss in the heat transfer process can be effectively reduced, loss caused by mixing of cold / heat energy of different energy levels is avoided, and the purposes of cold / heat energy graded storage, efficient air compression heat utilization and system efficiency improvement are achieved.