In order to analyze thermal economy of thermal system with steam turbine generator placement in high and low platform separately(new replacement scheme)

the resistance change of the thermal system before and after the new scheme is employed was calculated based on fluid mechanics

and the detailed thermodynamic model for domestic typical 1 000 MW unit with single-and double-reheat cycle was established

on the basis of the EBSILON? software. Moreover

the thermal efficiency of the thermal system using regular scheme and the new scheme was compared. The result shows that

in the new scheme

the heat rate drops caused by resistance drop in the main steam pipe and reheat steam pipe are in the same order of magnitude. For reheat units

because the system resistance decreases after the new replacement scheme is used

the coal consumption rate of power generation reduces by 0.5 g/(kW·h). For double-reheat units

the coal consumption rate of power generation reduces b y1 g/(kW·h)

which is as twice as that of the reheat-units.