590 results about "Cogeneration" patented technology

The invention relates to the technical field of hydrogen load capacity configuration, in particular to a multi-scene hydrogen load comprehensive energy system double-layer capacity optimal configuration method, which comprises the following steps of: firstly, constructing a multi-scene model containing strong, weak, discontinuous and non-hydrogen loads based on the time sequence characteristics of hydrogen loads in an industrial park; then a comprehensive energy system mathematical model covering wind and light power generation, hydrogen energy conversion, multi-type energy storage and cogeneration units is established; then, constructing a double-layer capacity optimization configuration model of which the upper layer takes the whole life cycle cost minimization and the lower layer takes the operation cost minimization and the system stability optimization as targets; and finally, solving a Pareto leading edge by adopting a non-dominated sorting genetic algorithm with an elitist strategy, making a decision by utilizing an approximate ideal solution sorting method, and screening out a capacity configuration scheme with optimal comprehensive performance. The problem that a traditional configuration scheme is difficult to adapt to multi-scene hydrogen load fluctuation is effectively solved, and the economical efficiency, the stability and the renewable energy consumption capacity of the system are remarkably improved.

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 discloses a high-pressure combustion combined heat and power generation energy storage system and method for hydrogen and oxygen production through electrolysis, and relates to the field of hydrogen energy storage. After the electrolytic cell produces high-pressure hydrogen and oxygen, the high-pressure hydrogen and oxygen are stored in the hydrogen / oxygen storage tank, the system can operate in a hydrogen / oxygen mode, and in the oxygen mode operation, the hydrogen and oxygen steam mixed gas from the oxygen storage tank and the hydrogen / oxygen evaporation compressor are combusted in the high-pressure combustion chamber to generate superheated steam, and then the superheated steam enters the expansion turbine to do work; due to excessive oxygen, dead steam after acting is separated into two working media through a gas-liquid separator, that is, gas enters a cooler to be cooled and then returns to a combustion chamber through a hydrogen / oxygen evaporation compressor, drainage water generated after liquid enters a heat supply heat exchanger is pressurized through a water pump and then enters a high-temperature combustion chamber, and therefore clean utilization of hydrogen energy and cyclic regeneration of the working media are achieved. The system can realize high power generation efficiency and excellent environmental protection performance, and is suitable for regions requiring stable consumption of fluctuating renewable energy sources, power and heat supply and the like.

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The invention discloses a multi-time-scale park integrated energy system distribution robust optimization scheduling method, which comprises the following steps of: constructing an electric heating collaborative system model taking a combined heat and power generation unit as a core, and introducing a carbon transaction mechanism; constructing a confidence set in combination with a 1-norm and an infinity-norm, and respectively making a robust start-stop plan and a flexible operation strategy in day-ahead and intra-day two-stage scheduling; a column and constraint generation algorithm is adopted to decompose the constructed day-ahead and intra-day two-stage model into a main problem and a sub-problem for repeated iterative solution, and an optimal scheduling scheme with both economical efficiency and robustness is obtained. According to the method, the uncertainty of new energy prediction is fully considered, and the coping of the park to the randomness of the new energy can be better played through processing of different time scales.

The invention provides a cogeneration unit peak regulation capability evaluation method, which comprises the following steps: firstly, constructing a thermodynamic system mathematical model, solving system coupling parameters under a deep peak regulation working condition through a multi-layer iterative loop architecture, and generating a multi-working-condition data set which covers a full working condition and meets physical consistency; secondly, deducing a linear qualitative relation equation of the power, the main steam flow and the heat supply steam extraction flow, preprocessing a data set, training a pure data driving model as a performance reference, introducing the linear qualitative relation equation as a physical constraint item into a loss function, and constructing and training a PINN; and finally, the rated boundary condition of the peak regulation capacity is determined, a thermal characteristic curve is obtained through PINN simulation, the peak regulation capacity range and the real-time peak regulation margin under different heat supply requirements are calculated, and the result is transmitted to a power system dispatching platform. According to the method, the all-working-condition peak regulation evaluation precision and reliability can be improved, and the flexibility and universality of the model are enhanced.

The invention discloses a multi-energy microgrid dynamic balance control and energy scheduling method and system. The multi-energy micro-grid dynamic balance control and energy scheduling method comprises the following steps: establishing a dynamic electric and thermal load prediction model of a rotary hearth furnace; a multi-energy micro-grid framework containing biomass power generation, photovoltaic power generation, gas turbine combined cooling heating and power generation, flue gas waste heat power generation and energy storage is constructed; establishing a system dynamic balance model and a multi-objective optimization framework considering production process constraints; designing a hierarchical dynamic balance joint control strategy; and scheduling by adopting a multi-time scale optimization algorithm. Through multi-energy complementation, waste heat gradient utilization and intelligent optimization scheduling, economical, reliable, low-carbon and efficient operation of energy supply of the rotary hearth furnace is achieved, comprehensive energy consumption and carbon emission are remarkably reduced, and an effective solution is provided for green low-carbon transformation of a high-energy-consumption industrial process.

The invention provides a combined heat and power system and a control method thereof, and relates to the technical field of combined heat and power. The system comprises a fuel gas heat and power cogeneration subsystem, a heat supply subsystem and a fused salt heat storage subsystem, the fuel gas heat and power cogeneration subsystem is used for fuel gas power supply, the fused salt heat storage subsystem can convert solar energy and / or flue gas generated by power supply into heat energy of high-temperature fused salt to be stored, and the heat supply subsystem conducts primary heating on heat supply return water through geothermal energy; and flue gas and / or high-temperature fused salt generated by power supply are / is used for conducting secondary heating on heat supply return water. Geothermal energy, solar energy and fused salt heat storage are coupled, and renewable energy sources are fully utilized for heat and power cogeneration, so that the power supply requirement and the heat supply requirement of a user are met. In the ground source heat pump unit, primary heating is conducted through geothermal energy, heat supply return water is heated into warm water, then the warm water is secondarily heated into hot water through smoke in the gas heat and power cogeneration system, the compression ratio of a compressor in a ground source heat pump can be reduced, and power consumption of the compressor is reduced.

The invention relates to the technical field of energy engineering, in particular to an energy system optimization method based on mine compressed air energy storage, and the method comprises the following steps: S1, constructing a multi-energy-flow network: constructing the multi-energy-flow network comprising waste mine renewable energy power generation, compressed air energy storage, mining mountain combined heat and power generation and ORC devices in combination with the full life cycle of a mine, a waste-recovery coupling energy topology of electricity-heat-cold-gas cooperative energy supply is formed; s2, multi-energy flow system modeling: establishing a mining mountain side equipment model and an abandoned mine side compressor, turbine power generation, gas storage and heat storage tank model; and S3, optimization scheduling modeling: introducing a CVaR index, constructing an optimization objective function containing energy purchase, operation and maintenance and energy abandoning costs, setting system operation and equipment constraints, and forming a risk-considered CMIES optimization scheduling model. According to the invention, the operation cost of the energy system in the mining area is reduced, renewable energy sources are efficiently consumed, and resources in the whole life cycle of the mine are cooperatively utilized.

The embodiment of the invention provides a multi-steam-source cooperative frequency modulation combined heat and power generation system and a control method. The system comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a multi-stage regenerative heater, a heating system and a heating steam supply pipeline. A main steam outlet of the boiler is connected to the high-pressure cylinder through a main steam pipeline, a steam exhaust port of the high-pressure cylinder is connected to the intermediate-pressure cylinder through a pipeline, a steam exhaust port of the intermediate-pressure cylinder is connected to the low-pressure cylinder through a pipeline, and a steam exhaust port of the low-pressure cylinder is connected to the generator through a pipeline. A condensate water outlet of the medium-pressure cylinder is communicated to a condensate water inlet of the boiler through a first condensate water pipeline; the heating system is communicated with a steam exhaust port of the medium-pressure cylinder through a heating steam supply pipeline; the multi-stage regenerative heater is arranged on the first condensate water pipeline and connected with the high-pressure cylinder and / or the intermediate-pressure cylinder through steam extraction pipelines, and steam extraction adjusting valves are correspondingly arranged on the steam extraction pipeline between the high-pressure cylinder and the multi-stage regenerative heater and / or the steam extraction pipeline between the intermediate-pressure cylinder and the multi-stage regenerative heater.

The present application relates to the technical field of cogeneration system optimization, in particular to a heat and electricity decoupling system based on geothermal long-time energy storage and a control method. By constructing a low-temperature underground aquifer energy storage unit (ATES), combined with an electric heat pump unit (EHP) to recover the waste heat of a cogeneration unit (CHP), the CHP is deeply decoupled from heat and electricity through collaborative operation. Through intelligent scheduling strategy, the heat supply ratio is dynamically allocated, the power generation adjustment range of the cogeneration unit (CHP) is improved, the wind power consumption capacity is improved, the wind power curtailment rate is reduced, and it is suitable for centralized heating scenarios with high wind power penetration rate.

The invention belongs to the technical field of comprehensive energy utilization, and relates to a multi-energy cogeneration carbon dioxide power cycle system and a method thereof. The multi-energy cogeneration carbon dioxide power cycle system comprises a gas storage bin, a first compressor, a first cooler, a liquid storage tank, a first turbine, a rear preheater, a hot water supply unit, a waste heat recovery unit and a cold energy recovery unit. The hot water supply unit supplies hot water to absorb heat generated by multi-stage compression of carbon dioxide to obtain steam, so that the steam is supplied to a user, and the waste heat recovery unit and the hot water supply unit are matched to absorb and store the waste heat of the system to heat the carbon dioxide after expansion acting. And then the cold energy recovery unit is used for recovering the cold energy in the carbon dioxide subjected to expansion acting so as to supply cold water to a user or make ice, so that the waste heat and the cold energy in the power circulation process can be recovered, steam and the cold energy including electric energy are output, the energy consumption of the system is reduced, and the energy utilization efficiency of the system is also improved.

The invention discloses a heat and power load intelligent distribution method of a heat and power cogeneration system, and mainly relates to the field of heat and power cogeneration unit load distribution. Comprising the following steps: S1, establishing a combined heat and power generation unit and performing system analysis; s2, determining an optimization target and a constraint condition of multi-unit thermoelectric load distribution and an operation domain of the units; s3, coupling a thermoelectric load power station economy calculation model by using a random forest algorithm; s4, establishing an improved particle swarm algorithm model; and S5, carrying out heat and power load distribution on the cogeneration system by adopting the improved particle swarm optimization model established in the step S4. The method has the advantages that load optimal distribution of the cogeneration system can be achieved, it is ensured that the system keeps a low coal consumption level during operation, the calculation process is simplified, the scheduling cost of the system is reduced, the improved particle swarm optimization is introduced, the problems that the algorithm is long in operation time and the calculation result is unstable are solved, and the method is suitable for large-scale popularization and application. Therefore, a better optimization result is obtained.

The utility model relates to a heat exchange tube, a heat exchange device, a cascade unit and a cold and heat cogeneration system, the heat exchange tube comprises a tube body and a first heat exchange structure, and the tube body is internally provided with a first channel used for containing a first working medium; the multiple first heat exchange structures are arranged on the peripheral face of the pipe body and used for making contact with a second working medium for heat exchange; the first heat exchange structure comprises a heat exchange main body and a turbulent flow part which are in angular connection. The first heat exchange structure of the heat exchange tube comprises the heat exchange main body and the turbulent flow part which are in angular connection, in the process that the second working medium firstly makes contact with the heat exchange main body and flows to the peripheral face of the tube body along the heat exchange main body, part of the second working medium makes contact with the turbulent flow part, turning of the flowing direction is achieved, and heat exchange efficiency is improved. Therefore, turbulent motion is generated at the turbulent flow part, the first heat exchange structure and a flowing boundary layer outside the tube body are damaged by enhancing disturbance on the second working medium, and the heat transfer efficiency and the heat exchange effect of the heat exchange tube can be improved.

The invention discloses a gas power plant combined heat and power generation real-time optimization method based on SIS data. The method comprises the steps of obtaining real-time SIS data of a gas power plant; based on the real-time SIS data and the historical SIS data, a dynamic safe operation boundary matched with the current operation condition is dynamically determined through an unsupervised learning algorithm, and the dynamic safe operation boundary is a variable constraint set representing the safe operation limit of gas power plant equipment and changing along with operation condition parameters; and by taking the dynamic safe operation boundary as a constraint condition of optimization solution, generating an operation control instruction for controlling the operation of the cogeneration unit. The safety boundary matched with the operation condition is dynamically identified through an unsupervised learning algorithm, and real-time optimization is performed by taking the safety boundary as a constraint, so that the conservative property of a traditional fixed boundary method is effectively overcome, and the economical efficiency of cogeneration operation is remarkably improved on the premise of ensuring the safety of a unit.

The embodiment of the invention provides a flywheel direct-driven cogeneration unit dynamic adjusting system and a control method thereof, in the embodiment of the invention, a magnetic suspension technology is adopted to eliminate friction of a traditional mechanical bearing, and quick starting and stopping of the rotating speed of a flywheel are realized; the high-temperature superconducting magnetic clutch achieves instantaneous mechanical coupling / decoupling of the flywheel and the circulating pump through the zero resistance characteristic, and the response time is short. The frequency modulation requirement of a new energy power grid can be matched, and meanwhile hard constraint of thermal load fluctuation on electric energy output is avoided. The mechanical direct-drive path directly utilizes the kinetic energy of the flywheel to drive the circulating pump, so that a multi-stage energy conversion link in a traditional mode is omitted; the electric adjusting path realizes bidirectional power exchange between the flywheel and a power grid through an energy interface device, and the loss of an inverter is reduced; and the high-temperature superconducting magnetic clutch realizes zero-energy-loss transmission in a coupling state. The magnetic suspension flywheel set adopts a non-contact suspension technology, so that mechanical wear is eliminated; the high-temperature superconducting magnetic clutch achieves non-contact transmission through magnetic coupling, and friction loss is avoided.

The invention provides a wind power-heat storage combined system optimization method based on scene clustering, and the method comprises the steps: collecting the real-time data of a combined heat and power generation unit, a wind turbine generator and a heat storage device, carrying out the clustering based on the real-time data through employing a K-means clustering algorithm, and determining the type of a current scene; the historical operation data and the current environment data are fused, and a next scene type is predicted by using a long short-term memory network; determining a scene switching time period in combination with the current scene type and the next scene type; a switching optimization objective function is constructed, and an optimal decision variable in a scene switching time period is solved in combination with a mixed integer dynamic programming algorithm; controlling the cogeneration unit, the wind turbine generator and the heat storage device to operate according to the optimal decision variable in the scene switching time period; optimization of a traditional static scene is converted into optimization of a dynamic conversion scene, wind power resources can be fully consumed, the thermal load requirement can be stably met, and efficient operation of the combined system in complex and changeable actual working conditions is guaranteed.

The invention relates to a modular methanol reforming and high-temperature membrane fuel cell coupled heat and power cogeneration system, which comprises a modular methanol reforming hydrogen production system, a modular high-temperature membrane fuel cell power generation system and an electric control system, and is characterized in that the modular methanol reforming hydrogen production system comprises a methanol reforming hydrogen production module, a methanol aqueous solution main pipeline and a tail gas main pipeline; the number of the methanol reforming hydrogen production modules is multiple, the methanol aqueous solution main pipeline is connected with the methanol reforming hydrogen production modules, and the methanol reforming hydrogen production modules convey obtained reformed hydrogen to the high-temperature fuel stack module; the high-temperature membrane fuel cell power generation module supplies power according to electric energy generated by reforming hydrogen; the electric control system is connected with the methanol reforming hydrogen production module, a temperature alarm value and a starting temperature value are set, the methanol reforming hydrogen production module is closed when the actual temperature of the methanol reforming hydrogen production module exceeds the temperature alarm value, the methanol reforming hydrogen production module is restarted when the actual temperature is lower than the corresponding starting temperature value, and the power supply cost can be reduced.

The invention discloses a spray cooling intelligent management and control system optimization algorithm for a 330MW cogeneration unit, and relates to the technical field of thermal equipment cooling, and the algorithm comprises the steps: obtaining unit operation parameters, environment meteorological data, a spray system state and resource price information, and forming multi-source synchronous input data; on the basis of multi-source synchronous input data, feasibility judgment is carried out according to preset temperature, load and water source conditions, and a spraying enable signal is output; based on historical unit operation data, optimizing a time sequence prediction model constructed by hyper-parameters through a genetic algorithm, in response to the spray enable signal, performing rolling prediction on the saturation temperature of the condenser by using the time sequence prediction model in combination with a candidate spray strategy to obtain a temperature change sequence; according to the temperature change sequence, power generation benefit increment is calculated in combination with thermal characteristics of the steam turbine, spraying energy consumption and water consumption cost are deducted, and an optimization function is constructed; on the basis of the optimization function, supercooling prevention, condensation prevention, amplitude limiting execution and water source total amount limitation are embedded as hard constraint conditions.

The system comprises a power generation system and a heat supply system, the power generation system comprises a boiler, a carbon dioxide turbine, a heat regenerator, a precooler, a compressor and a motor generator, an outlet of the boiler is connected with an inlet of the turbine, an outlet of the turbine is connected with a hot side inlet of the heat regenerator, and an outlet of the compressor is connected with a hot side inlet of the precooler. An outlet of the precooler is connected with an inlet of the compressor, an outlet of the compressor is connected with a cold-side inlet of the heat regenerator, a cold-side outlet of the heat regenerator is connected with an inlet of the boiler, and the compressor and the turbine are respectively connected with the motor generator. The heat supply requirement can be met, complete thermoelectric decoupling is achieved, and the flexibility of the supercritical carbon dioxide cycle generator set is fully exerted while stable heat supply is achieved.

The application provides a geothermal water cascade utilization based combined production system and method of heat, electricity and helium, which comprises, in sequence, a geothermal exploitation pretreatment unit, a thermal energy cascade utilization unit, a water-soluble helium gas purification and storage unit, a tail water reinjection unit and a valve control unit, wherein the valve control unit is provided with valve groups matched with the units according to functions. According to the application, the geothermal exploitation pretreatment unit, the thermal energy cascade utilization unit, the water-soluble helium gas purification and storage unit and the tail water reinjection unit are connected in sequence to realize the collaborative operation of the geothermal water cascade utilization and the water-soluble helium extraction. The valve control unit matched according to functions and the system interlocking control logic are provided to provide a targeted control structure for each process unit, realize the accurate control of process parameters and the flexible switching of working conditions, provide a structural basis for the online maintenance of subsequent equipment and the recycling of helium extraction, improve the overall operation stability of the system and improve the comprehensive utilization efficiency of geothermal resources and water-soluble helium resources.

The invention discloses an electric-thermal coupling system cooperative load recovery method and system considering electric vehicle aggregation charging and discharging. The method comprises the following steps: step 1, establishing an objective function with the minimum load loss amount of the electric-thermal integrated energy system; 2, constructing an electric-thermal coupling system collaborative load recovery model, wherein the model comprises load recovery stage network topology constraint, power system steady-state operation constraint and regional heat supply system steady-state operation constraint; and step 3, solving by using an interior point method to obtain output of a power distribution network, a regional heat supply system network topology, a transformer substation, a distributed power supply and a cogeneration unit in the electric-thermal coupling system. The method provided by the invention can be practically applied to formulating a toughness improvement strategy of the park-level electro-thermal coupling system, fully exploits the flexibility of an electric vehicle cluster, reduces the overall load loss amount of the system, enhances the ability of the system to cope with sudden faults, and ensures the safe and stable operation of the system.

The utility model provides a combined heat and power supply air supply system of a fuel cell, which utilizes a byproduct high-pressure pure oxygen generated by hydrogen production through water electrolysis as a working fluid, realizes air humidification and cyclic utilization of electric pile waste gas through combination of an injection device and an air compressor branch, reduces the use of a humidifier and an intercooler, and reduces the complexity and air flow resistance of the system. The system comprises an air inlet main path, an oxygen inlet branch path, an air inlet branch path and an injection device, waste oxygen is introduced into the oxygen inlet branch path, the air inlet branch path is provided with an air compressor, and the injection device mixes the waste oxygen and fresh air and supplies the mixed waste oxygen and fresh air into a galvanic pile. The air outlet pipeline is connected with the water segregator, waste gas is recycled to humidify fresh air, and a backflow adjusting valve is arranged. The system reduces the power consumption of the air compressor and improves the cogeneration efficiency of the fuel cell.

The invention relates to the technical field of flue gas recovery, and discloses a flue gas waste heat recovery device for combined heat and power generation, which comprises an energy conversion mechanism positioned in a main fixed rack, and is matched with an input tank body, a three-way input pipe and an assembly rack for contacting sucked flue gas; the heat exchange dissipation mechanism is located in the fixing shell and used for dissipating heat generated by the electronic element. The wind driven generator is located in the fixing shell and matched with the output shaft for wind power generation. By means of the liquid storage pool and the filter plate structure, heat energy in high-temperature flue gas is transmitted through contact of water and flue gas, water is heated, and therefore the heat energy is recycled, waste heat resources of the flue gas are fully utilized through the design, the heat energy utilization efficiency is improved, flow of the high-temperature flue gas drives turbofan blades to rotate, then the output shaft is driven to rotate, and the heat energy utilization efficiency is improved. Energy is converted into electric energy through the wind driven generator, the kinetic energy of the waste smoke can be directly converted into the electric energy, and an effective combined heat and power generation mode is formed.

The application relates to a combined heat and power system, which comprises a boiler, a generator unit, a molten salt heat storage subsystem and a steam heat storage subsystem; the generator unit comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder; the molten salt heat storage subsystem comprises a cold salt tank, a hot salt tank, a heat storage heat exchanger and a heat supply heat exchanger, the heat storage heat exchanger is provided with a first low-temperature medium flow channel and a first high-temperature medium flow channel, the heat supply heat exchanger is provided with a second low-temperature medium flow channel and a second high-temperature medium flow channel; the first high-temperature medium flow channel is connected with a steam extraction end of the medium-pressure cylinder; one end of the second low-temperature medium flow channel is connected with a water supply end, and the other end is connected with a heat user; the steam heat storage subsystem comprises a steam heat storage tank, an input end of the steam heat storage tank is connected with the steam extraction end of the medium-pressure cylinder, an output end is connected with a steam inlet end of the low-pressure cylinder, and the steam heat storage tank has the advantages of being able to meet different scheduling requirements and increasing the flexibility of scheduling.

The invention discloses a hydrogen fuel cell heat and power cogeneration system for zero-carbon energy supply of a building, and the system comprises a fuel cell power generation module which is used for receiving high-purity hydrogen as a fuel and generating direct current through electrochemical reaction so as to supply power to an electric load of the building. And the heat recovery and heat supply module is used for recovering heat generated in the operation process of the fuel cell power generation module so as to supply heat to a building heat load. And the hydrogen supply module is connected with the fuel cell power generation module and is used for providing hydrogen required by the fuel cell power generation module. And the intelligent energy management module is used for monitoring electric / thermal load requirements in real time and dynamically adjusting the output power of the fuel cell power generation module. The method has the advantages that zero carbon emission can be realized; the energy is efficiently utilized; the modular design supports flexible expansion from kW level to hundred kW level, and adapts to different building scales; the system has the capabilities of automatic start and stop, load following and grid-connected / off-grid switching; the environment adaptability is high; and the technology maturity is high, and a large-scale deployment basis is provided.

The invention provides a novel system for efficiently carrying out heat-work conversion by taking liquid ammonia / water as a circulating working medium, low-grade sensible heat can be recovered, latent heat is recovered by using an ammonia compressor to compress and heat a circulating working medium gasification heat source, and the heat-work or thermoelectric conversion efficiency is greatly improved. According to the invention, the liquefied latent heat of the working medium is effectively utilized as an internal heat source for circulating gasification, the economic and technical bottleneck of low efficiency of implementing low-grade thermoelectricity or heat-work conversion in the existing combined heat and power generation or ammonia working medium is well broken, the energy consumption and the working medium circulation amount can be greatly reduced, and the method has wide popularization and application values and is worthy of popularization and application. And greater economic and social environmental protection benefits can be created, and energy conservation and emission reduction are greatly realized.

The present application relates to the technical field of energy utilization, and particularly to a combined heat and power generation system capable of efficiently and flexibly heating by means of dual-unit combined supply, comprising a high backpressure unit and a conventional unit, and further comprising a first-stage heating unit, a second-stage heating unit, a third-stage heating unit, and a fourth-stage heating unit. In the present application, four stages of different heating units are provided and are simultaneously communicated with a conventional backpressure unit and the high backpressure unit, and a low-pressure cylinder crossover pipe heating mode and a low-pressure cylinder zero-output heating mode are flexibly selected on the basis of the total steam consumption demand of the third-stage and fourth-stage heater in combination with the real-time electric load condition of the conventional backpressure unit, so that the heating load of the units can be adjusted more flexibly; and when an electric load is determined, the external heating loads of the conventional and high backpressure units can fluctuate between -50% and +50%, and a high thermal-electric decoupling capability is realized.

Arrangement (1) for pasteurizing and subsequently separating solids from a slurry containing solid and liquid components, comprising: • a heating device (2) for heating the slurry containing solid and liquid components, • a storage container (5) for the slurry upstream of the heating device (2), namely a biogas plant, • a pasteurization device (3) downstream of the heating device (2) for pasteurizing the slurry containing solid and liquid components, • a pressing device (4), preferably a screw press separator, further downstream for separating the solids from the previously pasteurized slurry, • a combined heat and power plant (7) that can be operated by burning a gas phase (6), preferably biogas, escaping from the slurry stored in the storage container (5), wherein the heating device (2) for heating the slurry is designed to utilize at least part of the waste heat from the combined heat and power plant (7).and• a gassing vessel (8) for directly heating the slurry contained therein by direct supply and / or dispersion of a waste heat stream (13), namely a hot exhaust gas stream, from the combined heat and power plant (7) into the slurry.

The invention discloses a CHP low-carbon scheduling method and system considering carbon emission-fuel-power coupling, and belongs to the technical field of optimization control of a combined heat and power generation system. The method comprises the steps that carbon emission-fuel-power coupling is considered, and a CHP operation domain model is established; fitting a plurality of planes of the CHP operation domain by adopting an IRANSAC (Irregular Random Sample Consensus) algorithm; performing convex enveloping on the plurality of planes fitted by the IRANSAC algorithm, and then performing triangular segmentation to obtain a CHP operation domain convex reconstruction model; and building a CHP low-carbon scheduling model by considering the start-stop and climbing constraints of the CHP to perform CHP scheduling. According to the method, the real operation condition of the CHP is simulated and represented, meanwhile, an iterative RANSAC algorithm is provided, mixed integer linear form reconstruction of the carbon emission-fuel-power coupling relation is achieved in combination with the triangular segmentation theory, convex representation is conducted on the trade-off relation between low carbon and economy, and the method can be conveniently integrated into the low-carbon scheduling problem.