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im a doing a project on the efficiency improvement of a velocity compounded impulse steam turbine. we plan 2 do that by varying the input mass flow rate of steam and finding out the particular mass flow rate at which maximum efficiency is attained.

the data i could collect were: rated power of turbine = 820 kw

speed at full load = 5000 rpm

mass flow rate at full load = 11.3 tn/hr

speed at normal load = 3000 rpm

mass flow rate at normal load= 8.1 tn/hr

to find out the efficiency u need to find out the output shaft power 4 tat mass flow rate

the formula for output shaft power is = (2*3.14*N*T)/60000 KW

but the problem is tat turbine is not fitted with any device(eg dynamometer) 2 find out the torque at the shaft

is there any other method 2 find out the output torque developed on the turbine shaft?

are there any other formulas 2 find out the output power corresponding 2 the input mass flow given?

or are there any other suggestions 2 find out the max efficiency point. pls suggest

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# Steam turbine efficiency

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