The operation of the high pressure heater has important influence to unit efficiency. With 300 MW steam turbine thermal system as an example

combined with the high pressure heater end difference

extraction steam pressure loss and radiation loss

concluded the relationship between unit thermal efficiency and the operation of high pressure heater. The intensity coefficients of unit efficiency were calculated

the intensity coefficients was drawn out

and the curve between coal consumption rate and unit load was concluded. Get the important monitoring parameters of unit operation and the retrofit scheme of system. Theoretical foundation was provided for unit optimal operation and modification work.