To enhance the peak shaving performance of carbon capture coal-fired power plants

a novel power plant integrated with a heat pump and solvent storage process is proposed. A detailed thermodynamic model of the system is established

and a sensitivity analysis of key parameters in the heat pump system is conducted. The peak shaving performance of the novel power plant is compared with that of a reference power plant. In conjunction with the electricity spot market

an economic operation strategy for the carbon capture coal-fired power plant is proposed

and a techno-economic analysis is performed. The results show that under a 90% carbon capture ratio

the power output load range of the reference plant decreases from 300~1 085 MW to 431.7~905.5 MW

while the power output range of the novel plant expands to 103.2~1 085 MW

with near-zero power grid feed-in during peak shaving periods. Compared with the reference plant

the novel plant achieves a monthly coal saving of 10.4 thousand tons

reduces grid feed-in electricity during off-peak hours by 59.5 thousand MW·h

and increases grid feed-in electricity during peak hours by 14.4 thousand MW·h. Annually

it delivers an additional net revenue of approximately 186 million CNY

with a payback period of 4.4 years for the newly added equipment

demonstrating significant economic benefits. This technical pathway not only shows promising potential for engineering application and market promotion but also offers a practical and feasible solution for coal-fired power plants to balance low-carbon constraints with operational flexibility.