METHOD FOR CALCULATING STEAM TURBINE PRESSURE, METHOD FOR CALCULATING STEAM TURBINE EFFICIENCY, PROGRAM FOR CALCULATING STEAM TURBINE PRESSURE AND PROGRAM FOR CALCULATING STEAM TURBINE EFFICIENCY

摘要

PROBLEM TO BE SOLVED: To appropriately acquire steam pressure even if a steam pressure detector is not installed at an inlet or an outlet of any of a high pressure turbine, a middle pressure turbine and a low pressure turbine.;SOLUTION: A steam pressure characteristic function is prepared by detecting any three of inlet steam pressure of the high pressure turbine, inlet steam pressure of the middle pressure turbine, inlet steam pressure of the low pressure turbine and outlet steam pressure of the low pressure turbine, substituting them for P(x) of a steam pressure characteristic function (P(x)=ab^x+C), substituting the turbine stage number at the steam pressure detection point position for x, and calculating constants "a", "b", "c". Steam pressure at an imaginary detection point position is calculated by substituting the turbine stage number at the imaginary detection point position for steam pressure not detected out of inlet steam pressure of the high pressure turbine, inlet steam pressure of the middle pressure turbine, inlet steam pressure of the low pressure turbine and outlet steam pressure of the low pressure turbine for x of the prepared steam pressure characteristic function.;COPYRIGHT: (C)2006,JPO&NCIPI