Open forward and inverse cycle coupling triple supply system of electricity, heat and cold based on combustion gas turbine

Abstract

The invention discloses an open forward and inverse cycle coupling triple supply system of electricity, heat and cold based on a combustion gas turbine. The system comprises a gas compressor, a combustion chamber, a high pressure turbine and a generator, as well as an exhaust-heat boiler, an exhaust gas recuperator, an exhaust gas cooler, a low pressure turbine and a refrigeration heat exchanger; wherein an exhaust gas output end of the high pressure turbine is connected with an exhaust gas input end of the exhaust-heat boiler; a steam output end of the exhaust-heat boiler is connected with a steam input end of the combustion chamber; an exhaust gas output end of the exhaust-heat boiler is connected with a hot exhaust gas input end of the exhaust gas recuperator; an exhaust gas output end of the exhaust gas recuperator is connected with an exhaust input end of the exhaust gas cooler; an exhaust gas output end of the exhaust gas cooler is connected with an input end of the low pressure turbine; an exhaust gas output end of the low pressure turbine is connected with an exhaust gas input end of the refrigeration heat exchanger; and an exhaust gas output end of the refrigeration heat exchanger is connected with a cold exhaust gas input end of the exhaust gas recuperator. Through the system disclosed by the invention, the primary energy utilization rate can be improved and the self-balance of water recovery and water consumption is ensured.

Description

technical field [0001] The invention relates to gas turbine technology, in particular to a gas turbine-based open forward and reverse cycle coupled electric heating and cooling triple supply system. Background technique [0002] The gas turbine includes a compressor, a combustion chamber and a flue gas turbine (turbine for short). The compressed air output of the compressor is connected to the air input of the combustion chamber, and the flue gas output of the combustion chamber is connected to the input of the high-pressure turbine. The compressor continuously inhales air from the atmosphere and compresses it (increasing the pressure while raising the temperature), the compressed air enters the combustion chamber, mixes with the injected fuel and burns to become high-temperature flue gas, which then flows into the turbine to expand and perform work (Depressurization and cooling at the same time), the output shaft of the turbine rotates, driving the compressor impeller to ro...

AI Technical Summary

Problems solved by technology

However, due to air humidification, water (steam) is discharged to the atmosphere along with the smoke exhaust, and the system needs to replenish new water from time to time, which consumes a lot of water. It is difficult to achieve a self-balancing of water recovery and water consumption.

At the same time, due to the low dew point temperature of the flue gas, the total amount of latent heat released by the flue gas in the water recovery process is small, and the utilization value is low, which eventually leads to a low primary energy utilization rate

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