《电力勘测设计》杂志社有限公司

文章首先构建了火电机组物理模型，并以300 MW机组THA、75%THA和50%THA工况的设计值与模型计算值进行对比，验证模型的准确性。然后以三元熔盐作为储热熔盐，经过多种储热及释热组合工况的比选，以抽主蒸汽、疏水加热凝结水作为储热过程的优选工况，熔盐加热产生供热蒸汽作为释热过程的优选工况。最后以亚临界300 MW一次再热的供热机组为例，进行熔盐储热系统的方案设计以及技术经济评价。结果表明，按照福建省调峰辅助服务规则，在平均负荷率为50%，平均调峰补偿价格0.2元/kWh的情况下，熔盐储热系统的总投资约为3 870万元，静态投资回收年限约为21.2 a。

This paper firstly constructs a physical model of thermal power generation units, and compares the calculated data of the model with the design data of THA, 75% THA, and 50% THA operating condition of 300MW units to verify the accuracy of the model. Then, the ternary molten salt is used as the heat storage molten salt. After comparing multiple combined conditions of heat storage and release, the optimal working condition of the heat storage process is to extract the main steam and heating the condensate, and the optimal working condition of the heat release process is to directly produce steam by molten salt. Finally, taking the subcritical 300 MW reheating heating unit as an example, the scheme design and technical and economic evaluation of the molten salt heat storage system are carried out. The results showed that according to the peak shaving auxiliary service rules of Fujian Province, with an average load rate of 50% and an average peak shaving compensation price of 0.2 yuan/kWh, the total investment of the molten salt heat storage system is about 38.7 million yuan, and the static investment recovery period is about 21.2 years.