Analysis of Flexibility and Energy Consumption Characteristics of Coal-fired Power System Integrated with Molten Salt Thermal Storage
Integration molten salt heat storage has been recognized as a promising technology to enhance the operational flexibility of coal-fired power system.Variable condition and exergy analysis models were established for a coal-fired power system integrated with molten salt heat storage,and the variation law of the operational flexibility and energy consumption characteristics of the coal-fired power system was stud-ied based on two molten salt heat storage systems with reheating steam as heat source which returned to low-pressure cylinder inlet and condenser rspectively after heating with molten salt.The results show that the effects of different molten salt heat storage system configurations on the operational flexibility and en-ergy consumption characteristics of coal-fired power system are different obviously.Integrating two molten salt heat storage systems allows the minimum working loads of coal-fired power system to be reduced from 30%to 20.58%and 24.43%of the rated load respectively,and the system exergy losses are increased by 48.67 MW and 18.7 MW respectively.
coal-fired power systemheat storageexergy analysisoperational flexibility