Steam Boilers, Engines, Nozzles and Turbines
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

m = a + b × I.P.
I.P. = a × m + b
I.P. = b × m + a
m = (b/I.P.) - a

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