Load-Cycling Performance on The Coal-Fired Power Plants Integrated With Carbon Capture System
Carbon dioxide capture and storage is an important technological pathway to achieve climate change response goals based on ensuring energy security,and is an important strategic choice for achieving carbon reduction in the power as well as industrial sectors.However,high energy consumption and accompanying issues are key to the limit the development of carbon capture and storage at scale.In this paper,the load-cycling performance and exergy distribution of coal-fired power plants integrated with full flue gas carbon capture systems are investigated,and the variable working conditions performance of two turbine configurations of low carbon emission coal-fired units is compared.The results show that the energy consumption of the carbon capture system is 3.9 GJ·t-1 CO2 for full flue gas carbon capture,and the large irreversibility of the absorption and desorption processes leads to low efficiency of the absorber and stripper.After integrating the carbon capture system into the coal-fired power station,the efficiency of the configuration with the heat recovery turbine exhaust system is 1.5％higher than that with the medium-pressure cylinder exhaust,and the efficiency of the unit with the heat recovery turbine exhaust system.
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