摘要
本文通过建立包括汽动引风机、汽动给水泵在内的机组全热力系统变工况热力性能分析模型,对超超临界1 000 MW机组,计算了引风机背压式汽轮机驱动改造前、后在主要负荷工况下的热效率和供电煤耗的变化,比较了引风机电动机定速驱动和汽轮机变速驱动下的能量转换效率与经济性。结果显示:背压式汽动引风机改造后,当机组负荷低于90.0%时,既节能又经济;机组负荷高于90.0%时,不节能但经济。在机组目前年负荷率情况下,改造后年增经济效益881.36万元。
Thermal performance calculation program, to study the efficiency and economics after turbine-driven retrofit for axial draft fan using back pressure turbine, aimed for 1 000 MW Ultra-Supercritical Unit are developed. The paper demonstrates that, by compa- ring the thermal cycle efficiency and net coal consumption rate of unit post-and after-retrofit, it is both energy-saving and economical when load factor is below 90%, while it is economical but not energy-saving when load factor exceeds 90%. According to the distribu- tion of unit＇ s present load factor, the calculation result shows that it can bring the plant 8. 8136 million RMB yearly after retrofit.
出处
《燃气轮机技术》
2013年第3期33-37,共5页
Gas Turbine Technology
关键词
1000
MW超超临界机组
引风机
汽动
电动
1 000 MW ultra-supercritical unit
induced draft fan
steam-driven
electric-driven
