81 results about "Rankine cycle" patented technology

The invention provides an energy gradient utilization steam Rankine cycle power generation system and method for nuclear fusion, and belongs to the field of nuclear fusion energy conversion and utilization. Different temperature heat of a cladding, a divertor and a vacuum chamber is guided into a high-temperature independent heat storage loop, a medium-temperature independent heat storage loop and a low-temperature independent heat storage loop respectively, an operation section stores heat, and a pause section releases heat; feed water is heated step by step through a multi-stage preheater, an evaporator and a superheater according to the sequence of low temperature, medium temperature and high temperature, and superheated steam of 550 DEG C is formed to continuously drive a turbine to generate power. Decoupling of intermittent output of the fusion reactor and continuous operation of the power generation system is achieved, steam extraction of a steam turbine is omitted, the structure is simplified, and the energy utilization rate and the circulation efficiency are improved.

The invention provides a volumetric supercritical carbon dioxide Brayton cycle variable load system, belongs to the technical field of supercritical carbon dioxide Brayton cycle power generation, and can at least partially solve the problems that an existing steam Rankine cycle unit does not utilize the supercritical carbon dioxide Brayton cycle to integrally operate on a supercritical point and has no project. The Brayton cycle system comprises a compressor, a main loop and an adjusting branch, the adjusting branch comprises a pressure adjusting assembly, the amount of circulating carbon dioxide working media in the system is adjusted, the inlet pressure of the compressor is adjusted, and the working point of the compressor is changed; the temperature and pressure of the carbon dioxide working medium at the turbine inlet are changed by adjusting the heat exchange amount of the heat source heat exchanger, and rapid load changing is achieved.

To provide a working medium for heat cycle which has less influence over the ozone layer, which has less influence over global warming and which provides a heat cycle system excellent in the cycle performance (the efficiency and the capacity), and a heat cycle system excellent in the cycle performance (the efficiency and the capacity). A working medium for heat cycle comprising 1,2-difluoroethylene is employed for a heat cycle system (such as a Rankine cycle system, a heat pump cycle system, a refrigerating cycle system 10 or a heat transport system).

The application discloses a kind of energy comprehensive utilization system based on fusion device and its control method, the system includes: divertor cooling circulation loop, blanket tritium production loop, first cooling circuit, second cooling circuit, brayton cycle loop and rankine cycle loop;First cooling circuit and second cooling circuit are used for blanket cooling and purification, when the heat load of fusion device is less than preset threshold, only first cooling circuit is operated;When the heat load of fusion device is greater than preset threshold, first cooling circuit and the second cooling circuit are operated in parallel;Second cooling circuit is indirectly connected or directly connected with brayton cycle loop or rankine cycle loop by valve switching;Brayton cycle loop, rankine cycle loop is power generation circuit, and power generation mode includes rankine cycle power generation, brayton cycle power generation, combined power generation of rankine cycle and brayton cycle.The application can realize fusion device energy comprehensive utilization, and improve system flexibility simultaneously.

A system for providing mechanical and / or electric power from heat power. A heat medium is arranged in a flow circuit comprising: a condensation channel, a pump channel, an evaporation channel and a turbine channel, substantially in a Rankine cycle. Heating power is provided for evaporation of the heat medium and cooling power is provided for condensation of the heat medium. The pump channel is arranged in the liquid phase portion and a turbine device is arranged in the gas phase portion. The pump channel generates a pressure due to the rotation. The turbine channel comprises a turbine device. The flow circuit is closed so that no heat medium may escape to the surroundings.

The invention discloses an ORC power generation and three-mode heat storage system driven by hot dry rock terrestrial heat, and relates to the technical field of hot dry rock resource exploitation. The system comprises an organic Rankine cycle loop, a heat storage loop and a waste heat loop. The Rankine cycle loop comprises a generator, a turbo expander, a condenser and an evaporator, the turbo expander adopts a CO2 working medium as a circulating hot working medium, and the heat storage loop comprises a cold tank, a heat exchanger and a hot tank which are connected in sequence. According to the heat storage loop, the heat storage temperature range (150-300 DEG C) is highly matched with the temperature range (150-200 DEG C) of the hot dry rock, the performance of the organic Rankine cycle loop adopting the CO2 working medium is further improved compared with that of a traditional working medium, the waste heat loop is additionally arranged, waste heat of the condenser is used for heating low-temperature water generated by the heat exchanger through the waste heat loop, and the heat storage temperature range (150-300 DEG C) is greatly improved. The water temperature injected into the hot dry rock is increased, the energy utilization rate is increased, and the energy efficiency is improved.

The present application relates to the technical field of energy storage, and relates to an energy storage system based on thermochemical energy storage and Rankine cycle and an operation method. The energy storage system comprises a storage device, an energy storage device, an energy release device and a power generation device. The energy storage device comprises a calcium carbonate rotary calcining kiln, a first heat exchanger network and an electric heater, and the structural components are sequentially connected. The electric heater is used to convert excess electricity into heat energy, the calcium carbonate decomposition reaction is carried out in the calcium carbonate rotary calcining kiln, the heat energy is converted into chemical energy stored in calcium oxide, the energy release device is used to convert the chemical energy stored in calcium oxide into heat energy, the heat energy is converted into electricity by the power generation device, and the electricity demand of the terminal user is met. The energy storage system provided by the present application can realize the conversion, transmission and storage of different energies, has high energy conversion efficiency, can effectively reduce the coal consumption in the energy conversion process, and meets the energy saving and carbon reduction and flexibility reconstruction requirements of coal-fired power plants.

The invention provides an underwater vehicle one-way heat storage type ocean temperature difference energy power generation system which comprises an underwater vehicle body, a one-way heat storage type evaporator power generation system and a diving system. The one-way heat storage type evaporator power generation system and the rising and diving system are arranged in the underwater vehicle body. The power generation system comprises a turbine generator set, a condenser, a working medium pump and a heat storage type evaporator. An outlet of the heat storage type evaporator is connected with an inlet of the turbine generator set, and the turbine generator set is sequentially connected with the turbine generator set, the condenser, the working medium pump and an inlet of the heat storage type evaporator. Sea surface temperature seawater heat is stored through the energy storage phase change material, heat is not released to the environment in the submerging process of the underwater vehicle, when the underwater vehicle reaches the seabed, the stored heat and the cold energy of environment cold seawater are used for constructing temperature difference, and Rankine cycle is formed to achieve power generation. Therefore, the underwater vehicle has the capability of autonomously generating power by using the ocean temperature difference in the navigation process, and the endurance mileage and the sensor carrying capability of the underwater vehicle are improved.

The invention discloses an offshore platform fuel gas and supercritical carbon dioxide Rankine cycle combined power generation system, and relates to the technical field of offshore platform power generation systems. The problems that an existing thermal power generation technology in which a gas turbine and a steam turbine jointly operate is very low in power generation efficiency and high in carbon emission no matter in the low-temperature heat source field or the high-temperature heat source field are solved. Compressed air is mixed with fuel and combusted, high-temperature and high-pressure flue gas is generated, and a gas turbine is pushed to drive a gas turbine generator to generate power; high-temperature flue gas exhausted by the gas turbine enters the waste heat boiler, heat of the flue gas is used for heating a CO2 working medium in the waste heat boiler to generate high-temperature and high-pressure sCO2, an sCO2 turbine is pushed to drive a turbine generator to generate power, and gas and supercritical carbon dioxide Rankine cycle combined power generation is formed. The exhaust gas temperature of the boiler can be reduced by increasing the inlet smoke temperature of the waste heat boiler, so that the boiler efficiency can be improved after the flue type afterburning device is added, and the purposes of energy conservation and emission reduction are achieved. The invention is suitable for the technical field of offshore power generation.

The application relates to the technical field of hypersonic aircrafts, and particularly discloses a heat protection and power generation integrated system and method based on a semi-open Rankine cycle, which comprises a water storage tank, a hydrogen storage tank, an electrolytic cell, a steam turbine, a heat exchanger, a hydrogen turbine and a combustion chamber. The system uses liquid water to absorb heat at the leading edge of the aircraft, vaporizes into water vapor to drive the steam turbine to generate power, realizes active heat protection and waste heat conversion; the water vapor after work exchanges heat with liquid hydrogen in the heat exchanger to condense, preheats the fuel while completing the Rankine cycle; the vaporized hydrogen drives the hydrogen turbine to generate power again, improving the power generation efficiency; the condensed water can be introduced into the electrolytic cell to be electrolyzed into hydrogen and oxygen, and the generated hydrogen directly supplements the fuel. The system realizes efficient heat protection, continuous power generation, in-situ production and supplement of fuel through structure coupling, and effectively reduces the mass of the homeward journey system by converting water into fuel in the middle and later stages of flight, thereby improving the endurance and high-altitude performance of the aircraft.

The present application belongs to the technical field of aviation turbine engine, and discloses an intercooling regenerative water enhanced turbofan engine, which comprises a Brayton cycle and a supercritical water vapor Rankine cycle in a main flow path, the two cycles are closely related, and are coupled by increasing a steam turbine, a steam generator and a condenser. The steam turbine does work to supply a high-pressure compressor, and liquid water appears at the steam turbine outlet, the liquid water is injected into the high-low pressure compressor for intercooling, the intermediate temperature of the compressor is reduced, the power consumption of the compressor is reduced, the unit working medium thrust is improved, the intercooler is saved, and the application is facilitated, the low-temperature steam at the steam turbine outlet can be injected into the low-pressure turbine inlet for cooling, and the cold air amount can be effectively reduced and the unit working medium thrust can be improved. The present application effectively overcomes the high temperature difference and large loss of the steam generator, compared with the conventional aviation engine, the total efficiency of the engine can be greatly improved, the fuel consumption rate and the pollutant emission are reduced.

The disclosure provides a hybrid energy storage system, wherein the Brayton cycle unit comprises a first compressor, a first air-salt heat exchanger and an air-air heat exchanger forming a circulation loop, the cold side of the first air-salt heat exchanger is provided with a first inlet and a first outlet, the cold side of the air-air heat exchanger is provided with a second inlet and a second outlet, and the second inlet is used for air entering; the energy storage unit comprises a molten salt heat storage unit, the molten salt heat storage unit is connected with the first inlet and the first outlet to form a circulation loop; a Rankine cycle unit is connected with the molten salt heat storage unit to generate power by obtaining heat; and the processing unit comprises a first unit, the first unit comprises a compression section and an expansion section connected with the compression section, the compression section is connected with the second outlet, has a gas compression function, and is connected with the molten salt heat storage unit to deliver first temperature heat to the molten salt heat storage unit and second temperature compressed air smaller than the first temperature to the expansion section, and the expansion section has a gas expansion function to generate power.

A high-efficiency steam power cycle system for cascaded utilization of energy includes a steam cycle system and an organic working fluid Rankine cycle system. The steam cycle system includes a steam generator, a steam turbine, a condenser, and a separation device. The separation device is provided with a first outlet and a second outlet. An outlet of the steam generator, the steam turbine, the condenser, an inlet of the separation device, the first outlet, and an inlet of the steam generator are sequentially connected. The organic working fluid Rankine cycle system includes a heat exchanger; the heat exchanger is provided with a water-based absorbent inlet and a water-based absorbent outlet. The water-based absorbent outlet, an inlet of the condenser, the inlet of the separation device, the second outlet, and the water-based absorbent inlet are sequentially connected.

The invention relates to the field of hydrogenation utilization of C5 raffinate oil, and discloses a method and a system for lightening C5 raffinate oil. The method comprises the following steps: removing impurities from a C5 raffinate oil raw material through a pretreatment tower, and performing heat recovery through a hydrogenation reactor and Rankine cycle in sequence; a reaction product is subjected to primary gas-liquid separation to obtain circulating liquid and a liquid phase product, and after the gas phase product is cooled, light hydrocarbon is sent to secondary gas-liquid separation to recover liquid phase light hydrocarbon and hydrogen-rich tail gas. According to the process, hydrogenation reaction heat is utilized in a stepped and segmented mode, refrigeration is conducted through a Rankine refrigeration unit, low-temperature cooling capacity for flash evaporation gas-liquid separation is provided, and then raw materials are preheated through reaction materials obtained after heat exchange. The method can be used for treating C5 raffinate oil, the reaction efficiency is high, the separation effect is good, and the yield of C5 chemical products is increased; the method has the advantages of high efficiency, energy conservation, high conversion activity, high product yield and improvement of the added value of the product.

The invention relates to a deep utilization method and system for waste heat of high-temperature tail gas with multi-temperature-zone collaborative energy storage in the technical field of waste heat utilization and energy storage in ferrous metallurgy, and the system comprises a high-temperature flue gas system which is used for collecting, pretreating and conveying high-temperature flue gas; the thermochemical heat storage system is used for introducing high-temperature flue gas to convert heat energy into chemical energy for storage or introducing air to convert chemical energy into heat energy for release, the high-temperature flue gas is cooled to become first-temperature flue gas, and the air absorbs heat to become first-temperature air; the fused salt heat storage system is used for introducing first-temperature flue gas to store heat through sensible heat or release the stored heat; the Brayton cycle power generation system is used for generating power by using the first temperature air; and the Rankine cycle power generation system is used for generating power by using the fused salt heat storage system. According to the method and system, multi-temperature-zone stepped recovery of the electric arc furnace fluctuation tail gas can be achieved, graded energy supply and combined power generation from high temperature to medium and low temperature can be achieved, and the energy utilization depth and stability of the electric arc furnace strong fluctuation tail gas are remarkably improved.

The utility model relates to a steam Rankine-organic Rankine combined cycle power generation system which cools positive pressure exhaust steam of a steam turbine in a steam Rankine cycle through an organic working medium in the organic Rankine cycle and recovers latent heat of vaporization of steam in the steam Rankine cycle for organic Rankine cycle power generation. The steam Rankine cycle and the organic Rankine cycle are combined together, meanwhile, an internal circulation high-pressure water flue gas waste heat recovery system is adopted, the problem of low-temperature corrosion of flue gas waste heat of a power station boiler is solved, and the whole combined cycle power generation device is reasonable in process setting and high in heat utilization efficiency.

The invention discloses an efficient thermodynamic cycle intensive system suitable for comprehensive recovery of cold and hot energy of an offshore oil and gas platform, which comprises a three-stream cooling heat exchanger and a four-stream cooling heat exchanger, the three-stream cooling heat exchanger and the four-stream cooling heat exchanger construct double Rankine cycles to realize gradient utilization of energy, the first Rankine cycle is connected in series with the two cooling heat exchangers through working medium pipelines, and the second Rankine cycle is connected in series with the four-stream cooling heat exchangers through working medium pipelines. The second Rankine cycle is independently arranged on the four-stream cooling heat exchanger; the low-temperature liquid hydrocarbon and the low-temperature natural gas are conveyed out after being subjected to heat exchange step by step through the two cooling heat exchangers, cold energy and low-temperature waste heat are recovered synchronously, and the double-expansion generator set is driven to generate power. One set of device is adopted to recover the cold energy of low-temperature liquid hydrocarbon and low-temperature natural gas of a low-temperature condensation dealkylation device at the same time, different recovery processes do not need to be independently arranged, waste heat of an offshore oil and gas platform or similar scenes is recovered at the same time, cold energy and heat energy are coupled and matched, and efficient thermodynamic cycle of temperature difference energy power generation is developed; from the perspective of thermodynamic cycle, the process is simplified, the intensification of the device is realized, and energy conservation and carbon reduction are facilitated.

The invention provides a thermal power carbon capture and energy storage integrated system based on a calcium cycle coupling chemical looping combustion technology, and belongs to the field of thermal chemical energy storage and CO2 capture. The system comprises an energy release / CO2 absorption unit and an energy storage / CO2 release unit, and integration of CO2 capture and energy storage can be realized at the same time. The energy release / CO2 absorption unit comprises a compressor, a mixer, a carbonation / oxidation reactor, an expansion machine and a steam preheater which are connected in sequence; the energy storage / CO2 release unit comprises a calcination / reduction reactor and a Rankine cycle part connected with the calcination / reduction reactor; in the system, CaO / MeOx-1 is converted into CaCO3 / MeOx through carbonation / oxidation reaction, CaCO3 / MeOx is converted into CaO / MeOx-1 through calcination / reduction reaction, and circulation is formed. The invention solves the problem of low power generation efficiency in the energy release process due to the temperature of superheated steam lower than 650 DEG C because the existing calcium-based CO2 capture / energy storage integrated system releases energy in the form of generating power through heat recovery and steam production.

The invention provides a high-pressure natural gas wellhead pressure reduction and pressure energy and cold energy comprehensive recovery system, and belongs to the technical field of high-pressure natural gas extraction. The system comprises a depressurization filtering system, a pressure energy and cold energy recovery system and an emergency bypass system. The depressurization filtering system comprises a stop valve, a throttling valve and a filtering facility; the depressurization filtering system is connected with the pressure energy and cold energy recovery system and the emergency bypass system through a flow divider; the auxiliary system is additionally arranged on the pressure energy and cold energy recovery system; the natural gas expansion machine is connected with a mechanical energy utilization facility; and the organic working medium expansion machine is connected with a mechanical energy utilization facility. By additionally arranging the natural gas expansion machine, pressure reduction of high-pressure natural gas produced by a wellhead can be achieved, and meanwhile pressure energy can be converted and recycled; organic working medium Rankine cycle power generation is adopted, and cold energy of expanded natural gas is recycled, so that system energy is utilized more sufficiently; an emergency bypass system is further established, and the safety of the system is improved.

The utility model relates to a kind of steam rankine cycle systems of unmanned nuclear power platform for underwater mining, and the system includes the cabin filled with inert gas, main steam system is equipped in the cabin, steam turbine exhaust system, steam turbine generator unit, condensing feedwater system, steam turbine auxiliary system and circulating water system.The utility model under the premise of guaranteeing safety and reliability, according to underwater mining and unmanned operation scene, the auxiliary facilities of existing steam rankine cycle are simplified, to meet the compactness design requirement of nuclear power platform cabin room for underwater mining.

This invention provides a regenerative reverse Rankine cycle dual high-temperature heat pump system. The heat pump system includes: a first heat exchanger, a first compressor, a first regenerator, a second heat exchanger, and a first expansion valve. The first heat exchanger is connected to the first compressor via the first regenerator. The second heat exchanger is connected to the first compressor. The first expansion valve is connected to the first heat exchanger, and the second heat exchanger is connected to the first expansion valve via the first regenerator. By setting up the first regenerator, heat exchange is performed between the working fluid before throttling and before compression, thereby increasing the subcooling before throttling and significantly reducing throttling losses. At the same time, increasing the superheat at the outlet of the first heat exchanger avoids the damage to the compressor caused by wet compression due to ultra-high temperature dry working fluid, which helps to ensure the service life and high reliability of system components.

The application mainly applies to the technical field of cold quantity production, and discloses a refrigeration system of a two-stage low-temperature Rankine cycle unit capable of outputting electric energy, which comprises a first heat exchanger, a first gas storage tank, a first expansion generator set, a second heat exchanger, a first liquid storage tank, a first low-temperature pump, a second gas storage tank, a second expansion generator set, a third heat exchanger, a first compressor, a fourth heat exchanger, a fifth heat exchanger, a throttle valve, a gas-liquid separator, a second liquid storage tank and a second low-temperature pump. The application creatively uses the first law and the second law of thermodynamics to construct a system capable of outputting electric energy while producing cold quantity. The application has high refrigeration efficiency, greatly saves energy, is a high-efficiency green energy production technical system, and is worth popularization and application.

The application provides a Rankine cycle system and a pressure reduction control method. The Rankine cycle system comprises a circulation pipeline, a liquid storage tank, an evaporator, an expander and a condenser. The liquid storage tank, the evaporator, the expander and the condenser are sequentially arranged on the circulation pipeline. The Rankine cycle system further comprises a fluidic device having a flow inlet, a flow outlet and a suction inlet. The flow inlet is connected with a first communication port of the circulation pipeline. The first communication port is located between an inlet of the expander and an outlet of the liquid storage tank. The flow outlet is connected with a second communication port of the circulation pipeline. The second communication port is located between an outlet of the expander and an inlet of the condenser. The suction inlet is connected with a gas outlet of the liquid storage tank. The Rankine cycle system solves the problem that in the prior art, due to incomplete condensation of working medium after the condenser of the Rankine cycle system, gaseous working medium enters the liquid storage tank, thereby causing the pressure in the liquid storage tank to increase.

The invention discloses a thermal mass energy storage system power grading adjustment method based on virtual asynchronous machine control, and belongs to the technical field of thermal mass energy storage systems, and the method comprises the steps: converting the alternating current output by a power grid side into direct current in the process of injecting power into a thermal mass energy storage system by the power grid side based on a virtual asynchronous machine control method; according to the direct current-alternating current converter control method based on the V / f control strategy, power frequency alternating current of a power grid is improved to high-frequency alternating current so as to be matched with power pulsation of a heat storage device side; electric energy of high-frequency alternating current is converted into heat energy to be stored by a heat and mass energy storage system based on Rankine cycle; different heat capacity intervals are divided for the current heat mass energy storage working medium temperature according to the heat mass energy storage device, the virtual inertia coefficient of the virtual asynchronous machine is adjusted, an adjustment instruction is output based on the electric power level, and the power injected or released into the heat mass energy storage system is dynamically adjusted. According to the method, power dynamic balance and frequency support between the power grid and the Rankine cycle heat and mass energy storage system are realized.

The application provides a working method of a hydrogen energy type Carnot battery system. In a power storage mode, residual energy enters a hydrogen energy system for water hydrolysis to produce hydrogen; hydrogen-containing fuel gas and oxygen are stored; in a power supply mode, in a Brayton cycle, rare gas working medium enters a compressor to be compressed into high-pressure gas, the high-pressure gas, oxygen and fuel gas are mixed to obtain mixed gas and are combusted in a combustion chamber, the mixed working medium enters a turbine to do work and generate electricity, enters a waste heat boiler to isobarically release heat, and separated rare gas working medium enters the compressor again; in a Rankine cycle, liquid working medium enters the waste heat boiler to become steam, the steam is superheated and then enters a steam turbine to adiabatically expand to do work and generate electricity, enters a condenser to condense into liquid, is adiabatically compressed by a working medium pump, enters the waste heat boiler to repeat the above process. The application also provides a battery system. The method of the application realizes hydrogen energy storage of excess electricity by water electrolysis to produce hydrogen, and converts hydrogen energy into electricity by using a Brayton Rankine cycle.

The application discloses a coal power unit waste heat and waste quality recovery method and system based on an organic Rankine cycle, and the method is as follows: waste heat and waste quality are generated during the operation of the coal power unit, the waste quality carries the waste heat, the minimum pressure of the waste quality is selected and calculated after pressure loss, and the pressure is used as the rated pressure during the recovery of the waste heat and the waste quality, the recovered waste heat and waste quality are used for heating organic working medium in the organic Rankine cycle, and the organic working medium expands to do work; the condensed water is heat-exchanged with the waste quality discharged from an evaporator in the organic Rankine cycle in a heat exchanger, the heat discharged from the evaporator is utilized, and the heat-exchanged waste quality is recovered to a condenser, the organic Rankine cycle is combined with the inorganic Rankine cycle, the waste heat contained in the inorganic working medium is absorbed by utilizing the low boiling point characteristic of the organic medium to produce high-quality electric energy, the power supply capacity of the high-quality electric energy of the power plant is improved, the waste heat is used in stages to heat circulating water, the thermal efficiency of the inorganic Rankine cycle is improved, the waste heat utilization maximization is realized, the working medium is recovered, the working medium cost of the power plant is reduced, and the cost reduction and benefit increase of the power plant are promoted.

A system of waste management includes a steam gasification unit to convert municipal solid waste to a syngas. A molten carbonate fuel cell (MCFC) unit receives the syngas at an anode and an industrial exhaust gas at a cathode to generate electrical energy and separate a first carbon dioxide gas. An oxygen combustion unit receives remaining syngas from the anode and combusts the remaining syngas with oxygen to generate a heated gas stream. A steam Rankine cycle unit captures a first thermal energy from the heated gas stream. A carbon capture unit separates water and a second carbon dioxide gas from a resulting cooled gas stream. An electrolysis unit uses the electrical energy from the MCFC unit to split water into the oxygen gas for the oxygen combustion unit and a second hydrogen gas for the anode.

The invention discloses an LNG (Liquefied Natural Gas) cold energy power generation system based on a closed buried pipe, which belongs to the technical field of cold energy power generation and comprises a ground source heat pump heating-conveying unit, a Rankine cycle power generation unit and an LNG gasification unit which are connected in sequence, the ground source heat pump heating-conveying unit comprises a closed buried pipe, a first evaporator, a first condenser, a throttling valve, a compressor and a heat exchanger, and the closed buried pipe is of a vertical coaxial sleeve structure and comprises an outer pipe and an inner pipe arranged on the inner side of the outer pipe in a sleeving mode. According to the LNG cold energy power generation system based on the closed buried pipe, the middle-deep layer closed buried pipe and the LNG cold energy power generation system are combined, a circulating heat collecting medium in the closed buried pipe does not make direct contact with the stratum environment, recharge and underground water pollution are avoided, clean and stable geothermal energy serves as a main gasification heat source, and the energy consumption is reduced. Not only can the recycling efficiency of the LNG cold energy be greatly improved, but also the consumption of a large amount of fossil fuel and the emission of carbon dioxide are reduced.

This invention discloses an LNG-powered ship energy comprehensive utilization system based on oxygen-enriched combustion carbon capture, comprising an air separation oxygen production subsystem, a cold energy and waste heat utilization subsystem, and a cryogenic carbon capture subsystem. The air separation oxygen production subsystem is based on a low-pressure full reflux process, integrating a multi-stage pressurized intercooler to utilize the cold energy from air separation products and the cold energy released from the distillation column reboiler for air precooling and deep cooling. The cold energy and waste heat utilization subsystem uses LNG as a cold source and flue gas as a heat source, coupled with the energy utilization of waste nitrogen, recovering ship energy through a combination of exhaust gas turbines and Rankine cycles. The cryogenic carbon capture subsystem utilizes the cold energy from LNG, cryogenic oxygen, and waste nitrogen to precool, pressurize, and liquefy part of the flue gas, with the remaining flue gas being used as working gas and fed into the main engine. This invention, based on the oxygen-enriched combustion carbon capture method, produces high-purity oxygen using a simplified and energy-saving air separation process, and efficiently recovers and utilizes ship energy, achieving zero carbon emissions while saving electricity costs and improving navigation efficiency.

The invention relates to a water vapor-organic working medium combined cycle power generation system which comprises a water vapor Rankine cycle and an organic working medium Rankine cycle, saturated steam generated by a boiler forms superheated steam through a superheater and drags a steam turbine generator to generate power, steam exhausted by a steam turbine is condensed in a condenser, and formed condensed water returns to the boiler through a water feeding pump and an economizer. A liquid organic working medium passes through an organic working medium booster pump, an organic working medium heater and a condenser to form organic working medium superheated steam, an organic working medium gas turbine generator set is dragged to generate electricity, and exhaust gas of an organic working medium gas turbine is cooled through the condenser to form the liquid organic working medium. And high-temperature flue gas generated in the fuel combustion or industrial production process is discharged after being cooled by the boiler body, the superheater, the economizer and the organic working medium heater, or is discharged from a chimney through purification equipment and an induced draft fan.