With supercritical ( SC ) and ultra supercritical ( USC ) power unit main / reheat steam parameters increase the unit thermal efficiency being improved than the national average which have a significant effect on energy conservation and environmental improvement .

超（超）临界机组由于主/再热蒸汽参数提高，机组热效率比国内现有平均水平明显提高，且具有显著的 节能和改善环境的效果。