Combined power generation method of gas turbine and fuel cell

Abstract

The invention discloses a gas turbine and fuel cell combined power generation system and a running method thereof. The system comprises a gas turbine and a fuel cell. A combustion chamber of the gas turbine comprises a rich combustion chamber and a poor combustion chamber. During start, after air enters an air compressor, one part of the air enters the rich combustion chamber to be subjected to the partial oxidization rich combustion reaction with the fuel so that high-temperature synthesis gas can be generated, the high-temperature synthesis gas enters the poor combustion chamber to be reacted with the other part of compressed air so that high-temperature smoke can be generated, and the high-temperature smoke enters the turbine and drives a power generator to generate power. During normalrunning, the high-temperature synthesis gas generated by the rich combustion chamber enters a fuel cell anode and is subjected to the high-temperature electrochemical reaction with air entering a fell cell cathode so that power generation can be achieved. During variable work condition running, the high-temperature synthesis gas generated by the rich combustion chamber mainly enters the poor combustion chamber, and accordingly the excellent variable work condition performance of the gas turbine is utilized. The gas turbine and fuel cell combined power generation system and the running methodthereof have the advantages that start is rapid, and running and adjusting are flexible.

Description

technical field [0001] The invention relates to a combined power generation method of a gas turbine and a fuel cell, and belongs to the technical field of power generation. Background technique [0002] A fuel cell is one of the most efficient devices that can directly convert fuel chemical energy into electrical energy. Its energy conversion efficiency is not limited by the Carnot cycle and can theoretically be as high as 80%. Fuel cells are considered by the international energy community to be one of the most attractive power generation methods in the 21st century due to their higher energy utilization efficiency, low emissions, and low noise. However, fuel cells currently have the following two disadvantages in the field of high-power power generation: one is slow start-up and poor performance under variable working conditions; For battery utilization, hydrocarbon fuel needs to be reformed to generate carbon monoxide and hydrogen, and then delivered to the fuel cell. F...

AI Technical Summary

Problems solved by technology

However, fuel cells currently have the following two disadvantages in the field of high-power power generation: one is slow start-up and poor performance under variable conditions; For battery utilization, hydrocarbon fuel needs to be reformed to generate carbon monoxide and hydrogen, and then delivered to the fuel cell

Some current research on combined power generation of gas turbines and fuel cells mainly focuses on how to improve power generation efficiency, such as utilizing the residual fuel of fuel cells and high-grade waste heat through gas turbines, but there are few studies on improving the start-up and variable-condition performance of power generation systems

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