8results about How to "Improve cycle thermal efficiency" patented technology

The invention discloses a methane pre-cooling fuel gas generator circulation turbine enhanced combined power system which comprises a fuel turbine, a heat exchanger, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator, a gas generator and a gas generator, and is characterized in that the heat exchanger is used for providing heat for fuel from a fuel pump and conveying high-temperature fuel gas to the fuel turbine so as to drive the fuel turbine to rotate; the oxidant turbine is used for driving the oxidant turbine to rotate by taking the high-temperature fuel gas output by the heat exchanger and the high-temperature fuel gas flowing out of the fuel turbine as power, so that the oxidant turbine drives the oxidant pump to work; high-temperature fuel gas obtained after the fuel from the fuel pump is heated by the heat exchanger is also used for being converged with high-temperature fuel gas sequentially passing through the fuel turbine and the oxidant turbine and then entering the fuel gas generator; liquid methane is adopted for precooling incoming flow, the total temperature of incoming flow behind an air inlet channel is effectively reduced, the upper limit of the working Mach number of the turbine core machine can be expanded to be larger than Ma3.5, a stamping mode matched with the turbine core machine only needs to consider the working speed range larger than Ma3.5, and the working performance of the turbine core machine can be well released.

The invention relates to the technical field of gas turbines, in particular to a gas turbine combustion chamber outlet temperature optimizing and adjusting method and system.The method comprises the steps that a combustion chamber three-dimensional combustion calculation numerical model is established, and combustion chamber flow field characteristic parameters under the typical load working condition are calculated; the gas specific heat ratio of a combustion chamber outlet and the total pressure loss coefficient of the combustion chamber under the typical load working condition are obtained; fitting to obtain a calculation formula of the gas specific heat ratio and the total pressure loss coefficient of the combustion chamber; establishing a turbine inlet temperature calculation formula, and calculating the turbine inlet temperature; and the turbine inlet temperature obtained through calculation and combustion pressure pulsation data obtained from the operation data of the gas turbine generator set are fed back to a gas turbine control system, and the IGV opening degree and the fuel flow are adjusted. By accurately adjusting the outlet temperature of the combustion chamber, the circulating heat efficiency of the gas turbine and the operation safety of the gas turbine can be improved.

The present application belongs to the field of coal-fired power generation and energy storage technology, and particularly relates to a peak shaving device coupled with a supercritical carbon dioxide energy storage system of a coal-fired power unit. The present application uses supercritical carbon dioxide (sCO2) as an energy carrier to build a closed Brayton cycle comprising a compressor, a turbine, a heat exchanger and a storage tank, thereby improving the cycle thermal efficiency of the energy storage medium, avoiding the risks of solidification, leakage and corrosion of the working medium, and improving the safety of system operation. The device directly communicates the hot side inlet of the first heat exchanger with the inlet of the high-pressure cylinder of the coal-fired power unit, directly heats the sCO2 compressed by the compressor with high-temperature and high-pressure steam at the highest parameter of the boiler outlet, and does not need to be supplemented with heating. The waste heat of the sCO2 turbine exhaust is used to heat the feed water at the outlet of the deaerator and the condensate water at the outlet of the condensate water pump in sequence through the designed second and third heat exchangers, thereby reducing the amount of steam originally required to be extracted by the steam turbine and greatly increasing the power generation.

The invention relates to the technical field of boiler flue gas waste heat utilization, and particularly discloses a boiler waste heat composite utilization system and method.The system comprises a boiler and a sulfur removal tower, and the boiler is connected with the sulfur removal tower; the boiler flue gas desulfurization system is used for carrying out flue gas desulfurization on boiler flue gas and is connected with the desulfurization tower through a pipeline; the flue gas guide and drainage system is used for shunting desulfurized flue gas output by the boiler flue gas desulfurization system and respectively guiding and shunting the desulfurized flue gas to the air preheating system, the lignite drying system, the hot water network heating system and the condensed water heating system through four passages; the air preheating system is connected with the boiler; the flue gas guide drainage system synchronously controls the air preheating system and the lignite drying system; and the flue gas guide drainage system synchronously controls the hot water network heating system and the condensate water warming system. According to the invention, the flue gas waste heat discharged by the boiler can be effectively recovered and used for multiple purposes, so that the utilization efficiency of energy is remarkably improved, and the energy waste is reduced.

This invention discloses a multi-energy synergistic S-CO2 energy storage system and method suitable for industrial parks, relating to the fields of supercritical carbon dioxide energy storage and comprehensive energy utilization in industrial parks. The system includes an energy storage, pressure stabilization, and temperature control subsystem; a compression heat storage subsystem; a multi-energy cascade heat replenishment subsystem; and an expansion work and regeneration subsystem. Through pressure stabilization and temperature regulation of the low-pressure working fluid followed by compression energy storage; primary heat replenishment during the energy release phase after compression heat storage; secondary heat replenishment using an S-CO2 heat pump unit to upgrade low-grade waste heat in the park; and preheating and tertiary heat replenishment using a main regenerator and a solar-powered molten salt heat storage unit, the working fluid enters the main expander unit to generate electricity. Through synergistic regulation, heat source fluctuations and temperature and pressure disturbances are suppressed, maintaining the working fluid in a supercritical stable operating state throughout the process. This invention enables efficient electrical energy storage and release, multi-grade heat energy cascade utilization, and coordinated operation of power supply and heating in the industrial park.

The invention provides a gas oxidation treatment and carbon capture comprehensive utilization method and device. The device comprises a gas oxidation treatment power generation system, a heat recovery system, a carbon capture system, a carbon dioxide refining system, an energy recovery system, a carbon dioxide gasification system, a carbon conversion system and a heat exchange system. The gas oxidation treatment power generation system is connected with the heat recovery system and the carbon dioxide refining system, the gas oxidation treatment power generation system and the heat recovery system are connected with the carbon capture system and the carbon dioxide refining system, the carbon capture system is connected with the carbon dioxide refining system, and the energy recovery system is connected with the carbon dioxide refining system. The carbon dioxide gasification system is connected with the carbon dioxide refining system and the carbon conversion system. According to the invention, the energy of all gases in the system is fully recycled, the exhausted gases completely reach the environmental protection standard, energy is saved, emission is reduced, carbon dioxide is recovered and refined through carbon capture, and the refined carbon dioxide is further converted into chemicals and fuels such as methanol, methane, formic acid, carbon monoxide and the like.

The invention relates to a complete machine performance calculation method of a pulse detonation turbofan engine, which comprises the following steps of: performing design point performance calculation according to an air inlet channel, a fan component, an air compressor component, a mixing chamber and an exhaust nozzle of the pulse detonation turbofan engine; according to the method, performance calculation is sequentially carried out on a gas compressor component, a pulse detonation combustion chamber and a turbine component in the inner duct and the outer duct, obtained outlet parameters of the inner duct and the outer duct are compared with an iterative fan pressure ratio for judgment till static pressure balance of the inner duct and the outer duct is achieved, and finally performance parameters of the engine are obtained. The engine thrust is FN, the engine unit thrust is FS, and the engine unit oil consumption rate is SFC. When the method is used for overall design of the aero-engine, the pressure ratio of compression parts of the pulse detonation turbine engine can be effectively reduced, then the number of stages of a gas compressor and a turbine is reduced, the mass of the engine is reduced, the thrust-mass ratio of the engine is increased, finally, the performance of the engine is improved, and the iteration period of the overall design of the pulse detonation turbine engine is effectively shortened.

The present application relates to a kind of engine exhaust emission circulating system and its use method, belong to energy-saving and emission-reducing technical field, can improve the energy utilization rate when diesel generator burns, reduce exhaust pollution and problem.The engine exhaust emission circulating system of the present application includes engine, oil tank, supplemental combustion combustor, turbine, first compressor, air valve and intercooler, the exhaust gas of engine is burned in supplemental combustion combustor after secondary combustion, and turbine is driven to work, turbine drives compressor rotation to provide the required fresh air for engine and supplemental combustion combustor, while turbine drives generator to generate electricity and recovers residual energy.HC, CO and particulate matter in engine exhaust emission are converted into harmless substances by secondary combustion in the supplemental combustion combustor of the present application through supplemental combustion technology, while providing conditions for inhibiting the generation of NO X , can solve the problem of engine emission, and the secondary combustion of HC, CO, particulate matter and other substances further improves the energy utilization efficiency.