5. A single row impulse turbine receives 3 kg / sec steam with a friction etc amount to 15 KW, determine the blading efficiency and the blade velocity coefficient. The nozzle angle is 16° and the blade exist angle is 17°
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- In a single stage impulse turbine the blade angles are equal and the noz-le angle is 20 degrees . The velocity coefficient for the blade is 0.83. Find the maximum blade efficiency possible. If the actual blade efficiency is 90% of maximum blade efficiency, find the possible ratio of blade speed to steam speed.2A steam throttiing valve with iniet conditions of 2MPa and 400C is connected to the inlet of the turbine. The turbine has 200kW power output and heat abstracted of 100KW. If the mass fiow rate is 1kgis and the exit temperature of steam is 300C, find the exit turbine pressure.In a single stage impulse turbine the blade angles are equal and the nozzle angle is 20°. The velocity coefficient for the blade is 0.83. Find the maximum blade efficiency possible. If the actual blade efficiency is 90% of maximum blade efficiency, find the possible ratio of blade speed to steam speed.
- Q 2: - A one cylinders Freon (134a) compressor has a Bore and Stroke 5.4 and 4.8 cm respectively. It is speed 1450 rpm volumetric efficiency c.v 100% working fluid reaches expansion valve at 42°C and the temperature %3D of its suction -8°C:- a- Find the mass flow rate of the refrigerant, heat capacity and COPact& COPtho? b- Find the mass flow rate of the refrigerant, heat capacity and COP & COPtho if the clearance factor will be 5%?Ans. 3908 m/min. 14.5 Find the cylinder dimensions of a single-cylinder, double-acting compressor handling 28.32 e/revolution of air from 99.975 kPaa to 723.954 kPaa. Compression and reexpansion are in accordance with PV135 = C. Use the conventional volumetric efficiency; c = 5% and L/D = 1. %3D %3DA turbine receives steam at 10 MPa, 6000C and exhaust it at 0.2 MPa. (a) for the actual engine,the brake engine efficiency is 84%; the driven generator efficiency is 93% and the rated output of the generator is 30 MW. Compute the combined work, combined heat rate, and the total throttle flow for the rated power.
- Pls. Answer..thank you!? A steam engine develops 60 Bhp with dry saturated steam at 1034.25 kpa absolute and exhaust at 124.1 kpa. Steam consumption is 736.36 kg/hr. Calculate the thermal efficiency in percent of equivalent Rankine engine.What is the turbine output of 100m head and delivering 1 cu. m/ sec in a hydro electric power plant if turbine efficiency is 88%?Q2//The rotational-speed of an impulse turbine wheel is 3000 r.p.m. The nozzles are inclined at 20° and their efficiency is 0.89. The isentropic heat drop for the stage is 159 kJ/kg. If the blade speed ratio is 0.4, the blade speed coefficient is 0.82, and the blade efficiency is 0.76. Find for steam flow rate of 15 kg/s: 1. The mean blade ring diameter. 2. The power developed by the stage. B = 32.4°:Be : 38.5°). %3D %3D Answer (1.355m, 1613.2 kW,
- In a certain stage of impulse turbine the nozzle angle is 20° with the plane oi he wheel. The mean diameter of the blade ring is 2.8m. It develops 54k W at 2400rpm> Four nozzles, each of lcm diameter expand steam isentropically from 1.5MPA, 250°C to 50kPa. The axial thrust is 3.34N. Calculate (1) the blade angles at entrance and exit of the moving blades, (2) The power lost in blade friction, and(3) the stage EfficiencySteam engine with incomplete expansion receives saturated steam at 1.04 Mpa,expands it to 0.105 Mpa where release occurs. Exhaust is to a condenser at 40C.The actual engine uses 6070 kg/h of steam; it has a brake engine efficiency of 60%and a mechanical efficiency of 85%. The electric generator which it drives has anefficiency of 925. (a) For the ideal engine, find the thermal efficiency and the mep.For the actual engine, determine (b) the brake work in kW and the brake thermalefficiency, (c) the indicated work in kW, indicated thermal efficiency and indicatedsteam rate, (d) the combined thermal efficiency and the combined steam rateA steam turbine developed 2372.20 hp when its inlet condition is 1300 BTU/lb enthalpy and 400 ft/s velocity and steam flow of 200 lb/min. The exit enthalpy is 800 BTU/lb. Find the exit velocity.