3results about How to "Improve cycle thermal efficiency" patented technology

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.

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 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.