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Why given triping value 420 mmhg in vaccme system in steam turbine?
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Why is multistage used in steam turbine?
multistage is used because the expansion of high pressure steam will be gradual and as a result the rotor wont vibrate.suppose we have only 1 stage of blades in a turbine, hence all the steam will expand in the given stage and the speed of the rotor will be in high range around 30,000m/s, which is very difficult to control and operate the turbine.
How a nuclear power station works?
A nuclear power station uses heat given off by the controlled fission of enriched uranium. The heat is used to boil water, the steam blows through the vanes of a turbine, and the turbine spins an electrical generator.
How do you calculate specific fuel consumption of gas turbine?
A simple-cycle gas turbine used for power generation has a thermal efficiency of about 34 percent. Since 1 kwh is theoretically equivalent to 3,415 Btu, the simple-cycle gas turbine has a fuel connsumption of: 3,415 / 0.34 = about 10,000 Btu/kwh. Given the heating value (i.e, heat of combustion) of a fuel, we can easily calculate the simple-cycle gas turbine fuel usage. For example, natural gas has a net heating value of about 21,500 Btu/pound. Thus, the natural gas consumption in a simple-cycle gas turbine would be: 10,000 / 21,500 = 0.47 pounds/kwh = 0.21 kg/kwh. As another example, a typical diesel oil has a net heating value of 130,000 Btu/gallon. Thus, the diesel oil consumption in a simple-cycle gas turbine would be: 10,000 / 130,000 = 0.077 gallon/kwh. (The gallon used just above is the U.S. gallon rather than the Imperial gallon) A combined-cycle gas turbine will have a higher thermal efficiency and, hence, lower fuel consumptions.
What is the difference between turbine and pump?
Pump vs TurbinePump and turbine are two devices that are widely used in many industries. The turbine is a device that is capable of gathering energy and converting it to work. The pump is a device that is used to move fluids. Both of these devices are very important in fields such as electrical engineering, mechanical engineering, civil engineering, constructions, power generation, automobile engineering and numerous other fields. In this article, we are going to discuss what turbine and pump are, the operational principles behind turbine and pump, the types and variations of turbines and pumps, and finally the difference between turbine and pump.PumpA pump is a device that is used to move fluids. Pumps use mechanical energy to transfer these fluids. The most common example for the pump is the air compressor. It takes air from outside and transfer it to the inside overcoming the pressure of the gas inside. The pump is the device which does the work on the fluid in order to get it to a higher energy or entropy state. Most of the mechanical pumps are based on a rotary motion. There are pumps that operate on a linear motion too. Most pumps are driven by either electric motors or fuel engines. A pump does not convert energy to different forms; it rather directs the energy on a desired way. Some energy is always lost as sound, vibrations, and heat; therefore, a pump is not 100% efficient. The three main types of pumps are known as direct lift pumps, displacement pumps, and gravity pumps.TurbineA turbine is a device that is capable of absorbing energy from a given fluid stream and converting it to useful work. A turbine consists of a shaft or an axel which can be rotated around its own central cylindrical axis and blades attached to it. The blades of a turbine have the shape of the blades of a fan. An incoming fluid stream causes the axel to turn. This is the reverse process of a fan. This motion gives a uniform circular motion at the tip of the turbine. This end can be connected to a dynamo to produce energy. It can be connected to a pump to drive water from a deep well to a tank. Windmills and waterwheels are some of the oldest turbines. A turbine loses energy in the form of friction, sound, heat, and vibrations. This means the turbine is not a 100% efficient machine.What is the difference between Turbine and Pump?• A pump absorbs useful energy and converts it to kinetic energy and gives it to a fluid stream.• The turbine does the exact opposite as it absorbs energy from a fluid stream and converts it to work.• A pump increases the energy of the fluid stream whereas a turbine decreases the energy.
What is the importance os the Smith System?
The Smith System is the name given to a driving method that was developed by Harold Smith in 1948. The importance of the system is that it teaches safe driving methods to drivers of all different types of vehicles.
What is the name given to electricity generated by water moving through a turbine?
Hydroelectric energy is created by water powering a turbine.
What do you mean by whirl velocity of turbine?
Whirl velocity of a turbine is determined by how fast the turbine can turn when it is moving. This is a factor considered with airplane manufacturing. Whirl velocity is the number of times in a second that a turbine can rotate, moving at a given speed.
What name is given to the fan-like device that spins in a generator?
turbine
How can you use body waste to generate electricity?
The methane produced from decomposition, and the heat given off by the process itself, can be used to boil water into steam for a turbine system that can power a generator.
What is jet ratio in turbine?
Jet Ratio: it is defined as the ratio of the pitch diameter (D) of the pelton turbine to the diameter of the jet (d). It is denoted by m and is given asm = D/d (=12 for most cases)
What is wind turbine data?
Wind Turbine Data can cover a multitude of things really. If we stick to any one particular turbine of given size, it would especially be the mean power generated at given wind speeds; and the efficiency of the machine expressed as the ratio of available electrical power / wind energy absorbed. Such efficiencies are usually expressed as percentages so that fraction would be multiplied by 100 to turn into a % figure. In more detail are the complicated sets of data required to design the blades, gearing and alternator to convert a given quantity of wind at a given local mean wind speed, to electrical energy.
What is the mechanical advantage of a fan?
The answer lies in "Wheel and Axle". Steering wheel is is example for mechanical advantage. Door knob is also another example. This is a class 1 lever. But the same principle has not so far been utilized to manufacture turbines. I have designed a turbine utilizing wheel and axle example. This is known as "CHALASANI TURBINE". The characteristic feature of this turbine is that output exceeds input. The mechanical efficiency of the turbine will be more than 100%. The turbine can be designed with an efficiency rate of 200%, 1000% etc. When the output exceeds input, pumps can be used to cause the motion of the turbine in a closed circuit. In other words, the given mass of water can generate required quantum of power. In this system, to start the system energy has to be taken from the external sources. But once the system is started, it supplies energy not only for the self maintenance but also to the external load. We can generate energy to the social requirement. To clearly understand this concept please see my entry in "NASA techbriefs.create the future design contest 2010" in sustainable technologies.
What is a turbine barring gear?
When a large turbine rotor stops it will still be hot and will tend to bend in the middle if left to cool normally. To prevent this the barring gear will turn the rotor slightly at given intervals during the cool down period.
Where do nuclear power stations work?
A nuclear power station uses heat given off by the controlled fission of enriched uranium. The heat is used to boil water, the steam blows through the vanes of a turbine, and the turbine spins an electrical generator.
How Nuclear power station work?
A nuclear power station uses heat given off by the controlled fission of enriched uranium. The heat is used to boil water, the steam blows through the vanes of a turbine, and the turbine spins an electrical generator.
Why is multistage used in steam turbine?
multistage is used because the expansion of high pressure steam will be gradual and as a result the rotor wont vibrate.suppose we have only 1 stage of blades in a turbine, hence all the steam will expand in the given stage and the speed of the rotor will be in high range around 30,000m/s, which is very difficult to control and operate the turbine.
What is dearater in power plant?
It removes the gases present in the steam,given by heaters.dearater is necessary otherwise the gases in steam will corrode the boiler and also affect the turbine.
