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In: Mechanical Engineering

A single stage steam turbine is supplied with steam at 5 bars, 200 C at the...

A single stage steam turbine is supplied with steam at 5 bars, 200 C at the rate of 50kgmin. It exhausts into a condenser at a pressure of 0.2 bars. The blade speed is 400msec. Nozzles are inclined at an angle of 20 to the plane of the wheel and outlet blade angle 30. Neglecting friction losses, the power developed by the turbine will be?

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Expert Solution

Answer:

Given Data,

Pressure of Steam, P = 5 bar

Temperature of Steam, T = 200oC

Steam Flow Rate = 50 Kg/Min

Condebser Pressure, Pc = 0.2 bar

Blade Speed, N = 400 m/sec

Nozzle Inclination = 20o

Blade Inclination = 30o

Negelecting Friction

Solution:

From Steam tables,

At 5 bar & 200oC,

Enthalpy, H = 2855 kJ/kg

Entropy, S = 7.06 kJ/kgK

At 0.2 bar,

Hf = 952 kJ/kg

Hfg = 2358 kJ/kg

sf = 0.8321

sfg = 7.0773

Power developed by Turbine = H - Hc = 2855 - 2327 = 528 kJ/kg

samet mamat answered 2 years ago
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