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Well, the steam turbbine is most likely connected to an A/C generator which gives off the same frequency as the grid, so by running the turbine on a fixed frequency you don't have to condition the electricity before it can be released onto the grid.
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In a wind turbine - does increasing the blade length or decreasing the blade length increases the speed of the turbine?
Decreasing the blade length will increase the rotation speed, and thus the turbine speed ( for constant wind speed ).
What is second critical speed of turbine?
Critical speed means where natural frequency is equal to system frequency.
Difference between francis and kaplan turbines?
The comparison kaplan and francis hydro power turbine is as under: 1. Efficiency of Kaplan hydro power turbine is higher. 2. Kaplan turbine is more compact in cross-section and has higher rotational speed to that of francis hydro power turbine. 3. In Kaplan turbine, the water flow is axia and in francis trubine it is radial. 4. The runner blades in the kaplan turbine is less in number. 5. Specific speed of Kaplan turbine is 2 to 3 times that of Fancis turbine. 6. Friction loss in Kaplan turbine is less. 7. Francis turbine requires medium head while Kaplan trubines are low head hydro power turbines.
What is power-to-weight ratio of steam turbine and gas turbine?
there is a mathematical formula to figure the actual power measured in Inchpounds of torque for both types of turbine engines. due to the light weight of the engine and the very high speeds in which they operate they are very efficient compared to other type of power plants generally the rough power to weight ratio of a typical aircraft turbine engine is around 85 to 95% output power compared to the actual weight of the type engine used.the exception to this would be a turbo-fan engine used on high speed aircraft which the power output is measured in footpounds of thrust
How does ship's engine works?
Turbine i.e., engine converts fuel energy to mechanical energy by means of combustion...This turbine will drive the generator shaft i.e., mechanical input and the output will be electrical power and this electrical power will feed into induction motor which will converts this electrical power to mechanical power i.e., to drive the propeller and the ship will propel. The turbine used may be gas turbine or hydraulic turbine which depends on the speed of the ship should advance.
How does EGT and gas generator speed in a free power turbine with a constant speed propeller behave when power setting is increased?
I.The gas generator speed increases. II. The EGT increases
In a wind turbine - does increasing the blade length or decreasing the blade length increases the speed of the turbine?
Decreasing the blade length will increase the rotation speed, and thus the turbine speed ( for constant wind speed ).
What is the most important of the turbine used in a power station?
Keeping the speed constant is vital if the turbine is to deliver power synchronised with other turbines supplying the 'grid'. If it remains 'on line 'and 'out of phase ' with the 50/60 Hz AC frequency of the grid it will be destroyed.
What is second critical speed of turbine?
Critical speed means where natural frequency is equal to system frequency.
Is it true that the faster the propeller turns on a wind turbine the more electricity it makes?
No, in fact if the wind is strong enough, wind turbines can take power from the grid to help slow the blades down. Modern wind turbines have constant speed blades on them which vary the power to the hub for a given wind speed and keep the blade speed constant. Thus more power may happen at the same blade speed as low wind situations. Often higher blade speeds indicate that the turbine is in idle mode and not producing any power for the grid. Power is cubed so the power available is dependent on the wind solely. A 28 MPH steady wind will allow production of power at 100%. If the wind goes much above this speed, a shut down occurs. If the wind is at 14 mph, the power available is 10% of rated. Speeds of wind systems on the grid should be fairly constant. despite power setting.
What is governing of impulse turbine?
Basically governing of a turbine is controlling the speed of the turbine as the load keeps varying. The turbine needs to rotate at a constant speed. The governing of an impulse turbine is done by varying the jet of water that hits the buckets of the runner. This is done by using a spear arrangement in the pen stock. A pen stock is a type of pipe that provides the jet of water.
What is idle speed of turbine?
warm up speed of turbine,andthe minimum speed of turbine before loading is called idle speed.
What is governing of turbines?
Basically governing of a turbine is controlling the speed of the turbine as the load keeps varying. The turbine needs to rotate at a constant speed. The governing of an impulse turbine is done by varying the jet of water that hits the buckets of the runner. This is done by using a spear arrangement in the pen stock. A pen stock is a type of pipe that provides the jet of water.
What is critical speed of steam turbin?
Answer:Turbine shaft material has its own natural frequency, when turbine rotates on such a speed that frequency of shaft become close to its natural frequency, machine causes noise & high vibrations because of resonance due to matching of frequency. Running of Steam "TURBINE" on this speed is avoided & this is called Critical speed. A turbine may have more then one critical speed, which may depend upon number of couplings.A second critical speed is when the Turbine blade tips approach the speed of sound. This effectively limits the speed of a turbine and explains why power plants tend to have turbines of the same capacity.Critical speed of the turbine is the rotor speed at which natural frequency of the assembled rotor (rotor shaft with discs, blades, shrouding strips etc in assembled condition) becomes equal to the operating speed. This is usually a expressed as a range (critical speed range).There are multiple critical speeds. However, the operating speed of the turbine may be above or below the first / lowest critical speed. Accordingly it is called as a flexible or a rigid rotor.Venkatesh
What is the uses of packing steam in turbine?
The main uses for packing steam in a turbine are to produce electricity and power. The steam creates pressure when in turn spins a turbine at very high rates of speed.
What are reasons for over speed tripping of steam turbine genarator in a combined cycle power plant?
wHAT??
working of hydroelectric power plants?
This question is vague, but here is the way hydro-electric power plants work. Moving water turns a wheel or a turbine. The shaft of the water wheel or turbine is connected to an electric generator. As the generator spins, it produces electric energy. The efficiency of this system depends on the speed of the water past the turbine blades. Efficiency can be increased, and more power produced, if the water speed is increased. A large dam can put the turbine blades several hundred feet below the surface of the lake and increase water speed. A slow moving river can be used to produce electric power, but the main blade of the turbine (water wheel) has to be very large to produce torque. The shaft of the generator would be coupled to the large water-wheel through a set of gears that would increase the speed of the turbine shaft. The electric generator has fixed magnets or electro-magnets installed on the rotor (part that spins). The stator (wire windings in the shell) produce electricity when the magnetic field from the rotor passes near them.
