315MW机组发电循环系统优化热经济性分析

Analysis on thermal economic efficiency of power generation circulating system optimization of a 315 MW unit

以N315-16.7/538/538型机组为例,把有机工质循环加入火电机组热力循环系统,建立新型发电模型,将水蒸气循环模块和有机工质循环模块相结合,对不同设计工况进行热经济性计算。结果表明,优化模型可减少机组冷源热量损失、降低余热热污染并提高机组的热经济性。

Taking N315- 16. 7 /538 /538 unit as example,the organic working medium cycle was added into thermal circulation system of thermal power unit,and a new power generation model was established. Based on the combination of the water steam circulation module and the organic working medium circulation module,the thermal economic efficiency calculations for different designed conditions were carried out. The result show that the optimal model can reduce the heat loss of the unit cold end and the waste heat pollution,and the unit thermal economic efficiency can be improved.