Q - The rotor of an impulse turbine is 60 cm diameter and runs at 9,600 r.p.m. The nozzles are at 20° to the plane of the wheel, and the steam leaves them at 600 m/sec. The blades outlet angle are 30° and the friction factor is 0.8. Calculate the power developed per kg of steam per second and the diagram efficiency.

Q14: Arancis turbine operates under a head of (24.5m) and consumes (10.5m³/s) of water whilst runnlag at (225 r.p.m). The velocity of flow at inlet (6.5 m/s), the inlet blade angle is (65), assume hydraulic efficiency is (90%) and no volume and mechanical losses and velocity of whirl at exit equal to zero. Calculate i) Diameter of the runner at entry, ii) Specific speed of turbine runner. Q=TD.B.VP)

Cn yu do question 6

Q4: a four cylinder 75 mm bore and 75 mm stroke compressor run at 25 rps and has a volumetric efficiency of 75%. If the volume of the suction gas is 0.248 m3/kg and the machine has operating efficiency of 75%, what power will required on simple saturation cycle when difference between enthalpies of the suction and discharge gases is 150kJ/kg. If the refrigeration effect is 1087 kJ/kg what is the output in kW of refrigeration. State the COP?