Effect of Carbon Capture Technology Application on Peak Shaving Capacity of Coal-Fired Units

Abstract

ObjectivesThe mechanism of the impact of carbon capture technology on the peaking capacity of coal-fired power plants was analyzed, and the impact on the carbon capture technology on the power generation efficiency of coal-fired power plants was quantified.MethodsA typical coal-fired power plant was used as an example, and a post-combustion carbon capture scheme was selected. The simulation model of the conventional coal-fired thermal power unit and the carbon capture power plant was constructed by EBSILON software. The operation interval of the carbon capture power plant was derived. A comparative analysis of the operation of the carbon capture power plant and the conventional coal-fired power plant was conducted, and the variation in peaking performance was investigated.ResultsThe equivalent output power of the carbon capture power plant decreased by 1%-2%, the net output power decreased by 20%-30%, and the net efficiency of the whole field decreased by 8%-10% compared with the conventional coal-fired power plant.ConclusionsThe addition of a carbon capture system allows the plant to gain greater downward peaking depth and faster peaking response, although it reduces efficiency.

Keywords

• carbon capture, utilization and storage(ccus)
• coal-fired power plants
• carbon capture power plants
• peak shaving