Gas turbine inlet double-loop cooling system and method utilizing refrigerating station cooling capacity allowance

Abstract

The invention discloses a gas turbine inlet double-loop cooling system and method utilizing refrigerating station cooling capacity allowance. The system comprises a refrigerating station, a cold user,a cooling heat exchanger and a gas turbine, wherein a main pipeline of the refrigerating station is connected with a water inlet of the cold user, a branch pipeline is connected with a first-stage water inlet of the cooling heat exchanger, and a first-stage water outlet of the cooling heat exchanger is converged into a chilled water return main pipe; a main pipeline of the cold user is connectedwith the chilled water return main pipe, the branch pipeline is connected with a second-stage water inlet of the cooling heat exchanger, and a second-stage water outlet of the cooling heat exchanger is converged into the chilled water return main pipe; and the chilled water return main pipe is connected with a water return opening of the refrigerating station, outside air is connected with a gas inlet of the cooling heat exchanger, and a gas outlet of the cooling heat exchanger is connected with a gas inlet of the gas turbine. The two stages of cooling heat exchangers are additionally arrangedat an inlet of the gas turbine, chilled water return is utilized for cooling air at the inlet of the gas turbine, and therefore the temperature of the air at the inlet of the gas turbine is reduced.

Description

technical field [0001] The invention belongs to the technical field of combined cycle power generation, and in particular relates to a gas turbine intake double-loop cooling system and method utilizing the cooling capacity surplus of a refrigeration station. Background technique [0002] The combined cycle generator set has the characteristics of fast start-up and fast peak regulation. As the proportion of the installed capacity of the combined cycle generator in the power grid gradually increases, it plays an increasingly important role in the peak regulation of the power grid. However, in summer with high ambient temperature, due to the increase of gas turbine intake temperature, the output and thermal efficiency of the combined cycle unit are severely reduced, and its peak shaving capability and unit performance are affected. [0003] For distributed combined cycle units, it is often equipped with a refrigeration station to realize the combined supply of cold, heat and el...

AI Technical Summary

Problems solved by technology

However, in the summer with high ambient temperature, due to the increase of gas turbine inlet temperature, the output and thermal efficiency of the combined cycle unit are severely reduced, and its peak shaving capability and unit performance are affected

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