(d) In the Hirakud hydroelectric power station, there are four Kaplan and two Francis turbines, operating under an avera

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D In The Hirakud Hydroelectric Power Station There Are Four Kaplan And Two Francis Turbines Operating Under An Avera 1 (31.08 KiB) Viewed 26 times

(d) In the Hirakud hydroelectric power station, there are four Kaplan and two Francis turbines, operating under an average head of 26.5 m. The overall efficiency of the Kaplan type is 90%, and that of the Francis turbine is 88%. Both types have a mechanical efficiency of 94.4% between the turbine and the alternator. i. The design flow rate for the Kaplan turbine is 170 m's and operating speed 150 rpm. Calculate the shaft power, the electrical power output, and the specific speed. ii. For Francis turbines, W, = 2.25, and an electrical power rating of pe= 24,000 Kw. Determine the flow rate and the rotational speed.