彭家辉,倪永中,王元良,廖燕清,徐鸿

• 1:华北电力大学能源动力与机械工程学院

摘要(Abstract)：

随着新能源发电装机量增加导致电网调峰压力增大，火电机组要承担更多调峰任务，但目前火电机组的灵活性和调峰能力都较差。针对某亚临界300 MW燃煤机组，进行熔盐储能改造，提出了6种储热策略和2种放热策略，分析了3种工况下储-放热过程对机组调峰能力及热力性能的影响，并用净现值法进行了技术经济分析。结果表明：抽再热蒸汽储热可行性高，调峰深度能到58.9%，但会增加煤耗；放热时，加热给水产生蒸汽做功的发电增量最大，能到额定发电量的11.3%，但对熔盐的温度水平要求高；高温熔盐代替低压加热器预热给水可行性高，但发电增量低；储-放热全过程中，循环电效率最高可达0.987；进行了储热改造经济性分析，计算得动态投资回收期为11.65年，净现值为4 911.8万元，改造方案可行。

关键词(KeyWords)： 熔盐储热;调峰能力;热力性能;净现值

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2022YFB4100403）~~

作者(Author): 彭家辉,倪永中,王元良,廖燕清,徐鸿

DOI: 10.19666/j.rlfd.202304054

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