Volume 46: Energy Transitions toward Carbon Neutrality: Part IX

Coal- fired power plants with large-scale carbon capture systems are optimized using waste heat utilization to operate load-cycling Yue Fu, Yali Yang, Liyuan Wang, Ming Liu, Junjie Yan

Abstract

Coal-fired power plants integrated with post-combustion carbon capture technology are selected as an effective way to meet the demand for electricity, and to ameliorate the environmental pollution caused by the burning of fossil fuels. However, there is energy loss in the coal-fired power plants integrated with large-scale carbon capture systems. To obtain the optimal system parameter of coal- fired power plants integrated with large-scale carbon capture systems, the inlet temperature of the stripper and the irreversibility of the system is first analyzed, followed by waste heat utilization. As renewable power generation deployment grows, fossil fuel plants, including coal-fired units with coupled carbon capture systems, are being forced to operate more flexibly. The performance of coal-fired power plants integrated with large-scale carbon capture systems under load-cycling operation conditions is analyzed. It turns out that the exergy efficiency of CPCC under 30%THA is the lowest, only 2.9%. The structures should be restructured under low load ratio.

Keywords carbon capture and storage; load cycling operation conditions, exergy analysis; optimization