The efficiency of turbine stage at designing point increases 15%, and the flow rate and efficiency of turbine stage are enhanced remarkably within a wide working range.

The efficiency of a coal-fired thermal plant is typically in the range of 30%-35%. In a combined cycle gas turbine system running on natural gas, the maximum efficiency is in the range 45%-50%.

Recuperator, as the key part in recuperated cycle, plays the important role in efficiency increasing of gas turbine.