燃气-蒸汽联合循环机组给水泵驱动改造及节能分析

Transformation and Energy Efficiency Analysis of Feedwater Pump for Gas Steam Combined Cycle Unit

本文提出了一种燃气-蒸汽联合循环机组给水泵改造方案,并建立了热效率计算模型。以某典型燃气-蒸汽联合循环机组在不同负荷下(60%～100%负荷)的运行参数为例,经计算分析得出:采用小汽轮机驱动给水泵的方式较电动机驱动每年可节约运行成本21. 4～36. 2万元,全厂热效率也有所提高,具有显著的经济效益。

The paper discussed the energy conservation of the steam turbine-driven fans.Based on the thermal efficiency calculation,and taking a typical gas steam combined cycle unit under different loads(60%~100%)of the operating parameters as an example,The results show that the steam turbine-driven feedwater pump has economic benefit than the electric drive,which can reduce by 214~362 thousand yuan per year and improve the thermal efficiency.