A steam power plant has two turbines in series which together develop a power output of...

A steam power plant has two turbines in series which together develop a power output of 25MW. The boiler supplies steam at 80 bar, 500°C to the high-pressure turbine in which there is an enthalpy drop of 420 kJ/kg. The exhaust from the high pressure is at a pressure of 15 bar, at which pressure some of the steam is delivered to an open-type feedwater heater while the remainder is reheated to 450°C. The steam from the reheater is expanded in the low-pressure turbine to a condenser pressure of 0.05 bar and 0.92 dryness fraction. The condensate leaves the condenser at 25°C and is pumped into the feedwater heater at 15bar where it mixes with the bled steam from the high-pressure turbine exhaust. The feedwater leaves the heater at 188°C and is pumped into the boiler. You may neglect the feed pump work.

Calculate the mass flow rates through the high and low-pressure turbines

Expert Solution

samet mamat answered 2 years ago

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