Fed air conditioning system of gas-steam combined cycle power plant and use method of fed air conditioning system

Abstract

The invention provides a fed air conditioning system of a gas-steam combined cycle power plant and a use method of the fed air conditioning system. The air outlet end of a gas turbine is communicated with a heat recovery boiler; the heat recovery boiler is communicated with a steam turbine. The fed air conditioning system comprises a surface air cooler unit and a lithium bromide absorption chiller, wherein the air outlet end of the surface air cooler unit is communicated with the air inlet end of the gas turbine; a heat exchange water pipe is arranged in the surface air cooler unit and is communicated with the heat recovery boiler; the lithium bromide absorption chiller is communicated with the heat exchange water pipe. The fed air conditioning system is used for increasing the unit output under summer working conditions, and simultaneously improving the unit efficiency under winter working conditions and the unit efficiency under partial loading working conditions, so that the occurrence of the supply-demand non-matching problem of the unit and a power grid at different running stages is reduced, and simultaneously the running economy and flexibility of the gas-steam combined cycle power plant are improved.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to an intake air-conditioning system of a gas-steam combined cycle power plant and a method for using the same. Background technique [0002] The operating performance of the gas turbine and its combined cycle power plant will inevitably be affected by the ambient temperature. As the ambient temperature increases, the density of the air decreases, while the specific volume increases, and the amount of air sucked by the compressor decreases. The power generation of the gas turbine and its combined cycle decreases with the increase of the ambient temperature. This will cause the problem that the performance of the unit does not match the user's needs during some special operating periods, such as summer operating conditions, winter operating conditions or partial load operating conditions. For example, in the high electricity load demand stage of the peak summer, the unit output will...

AI Technical Summary

Problems solved by technology

When heating the intake air, the closed-loop cooling water of the power plant with a lower temperature is selected as the heat source working medium for heating the intake air. Since the temperature of the closed-loop cooling water is not much different from the ambient temperature of the atmosphere, its The technical solution can only prevent the cold air from freezing below its dew point temperature in winter, and cannot adjust the intake air temperature to a large extent

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