Thermodynamic system for improving fuel gas-steam combined cycle performance and working method thereof

Abstract

The invention discloses a thermodynamic system for improving gas-steam combined cycle performance and a working method of the thermodynamic system, and belongs to the technical field of heat energy power. Comprising a gas compressor, a combustion chamber, a gas turbine, a gas turbine generator, a waste heat boiler, a steam turbine, a steam turbine generator, a water vapor condenser, a boiler water feeding pump, a compressor, a mechanical refrigeration condenser, a mechanical refrigeration throttling valve, a mechanical refrigeration evaporator, an absorption refrigeration heat source heat exchanger and an absorption refrigeration condenser. And an absorption refrigeration throttle valve and an absorption refrigeration evaporator. The gas inlet temperature of the gas compressor of the gas turbine can be greatly reduced, the power consumption of the gas compressor is greatly reduced, the gas density is increased, the mass flow rate of the gas compressor is increased, the output power of the gas turbine can be improved, and the influence of environment humidity is avoided. In addition, heat released by the absorption refrigeration condenser and the mechanical refrigeration condenser can be absorbed by circulating condensate water of the steam turbine, heat waste is avoided, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of thermal power, and in particular relates to a thermal system and a working method for improving the performance of a gas-steam combined cycle. Background technique [0002] Since the birth of gas turbines, the pursuit of higher performance has been one of the main goals of researchers, such as greater single-machine output power and higher thermal efficiency. Among them, greater output power can achieve lower manufacturing cost per unit power, and higher efficiency means that the same power can be generated, and less fuel is required, which has better economy. In order to improve the economy of the power cycle, the gas turbine used for ground power generation often adopts the form of gas-steam combined cycle, that is, the gas turbine cycle is used as the top cycle, and the coupled steam turbine cycle is used as the bottom cycle to make full use of the heat of the exhaust gas of the gas turbine, so that th...

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Problems solved by technology

[0004] However, the technical solution of water spray humidification at the inlet of the gas turbine has obvious limitations, for example, it can only be used in a dry and high-temperature intake environment, but for a high-temperature and high-humidity environment, this technology is powerless

Arranging a refrigeration system at the inlet of the gas turbine can reduce the power consumption of the low-pressure gas turbine and improve the cycle performance in a high-temperature and high-humidity environment, but the system is complicated and it is not convenient to further improve the cycle performance, and each system has independent heat-radiating components, and the heat cannot be greater make the most of

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