[8 Marks) (d) In the Hirukud hydroelectric power station, there are four Kuplan and two Francis turbines, operating unde

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8 Marks D In The Hirukud Hydroelectric Power Station There Are Four Kuplan And Two Francis Turbines Operating Unde 1 (39.66 KiB) Viewed 57 times

[8 Marks) (d) In the Hirukud hydroelectric power station, there are four Kuplan 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.... The design flow rate for the Kaplan turbine is 170 m/s and operating speed 150 rpni. Calculate the shaf power, the electrical power output, and the specific speed. [10 Marks] ii. For Francis turbines, W. = 2.25, and an electrical power rating of Po Ws , 24,000 Kw. Determine the flow rate and the rotational speed. [8 Marks)