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Steam is redirected back into the boiler from the high-pressure turbine for reheating, but the steam from the low-pressure turbine enters into a condenser to become water again.
What else can I help you with?
Where are the requirements for steam turbine maintenance jobs?
To find out more about steam turbine maintenance jobs specifications one would be advised to contact specialists from recruitment agencies or job centers.
In thermal power generation part the steam came from turbine condensed and again resend to steam conversionIn this part my doubt is why return steam need to be cooled?
The low pressure steam from the last stage of the steam turbine is condensed so that it can be pumped back to the steam raising units at high pressure, as water. You can't compress steam as it would condense in the compressor. The only way to use steam as a gas in a gas turbine would be if it was supercritical, but this would mean operating at temperatures well above the limits for most engineering materials, and steam at these conditions would be very corrosive. This type of reactor cycle using a gas turbine has been considered using helium as the working fluid, and it may be built as the "pebble bed" reactor, or it may not. I think you need to understand more of thermodynamics. Read the Wikipedia entry for the "Rankine Cycle", see link below
What is the effect of silica on steam turbine blades?
Although several factors influence the formation of deposits on turbine components, the general effect is the same no matter what the cause. Adherent deposits form in the steam passage, distorting the original shape of turbine nozzles and blades. These deposits, often rough or uneven at the surface, increase resistance to the flow of steam. Distortion of steam passages alters steam velocities and pressure drops, reducing the capacity and efficiency of the turbine. Where conditions are severe, deposits can cause excessive rotor thrust. Uneven deposition can unbalance the turbine rotor, causing vibration problems.The nature of silica deposits found on turbine blades varies greatly. lists a number of silica compounds that have been identified in various studies of turbine blade deposition. Of these, amorphous silica (SiO2) is the most prevalent.Localized Silica Saturation. Turbine deposits are also formed where localized silica saturation occurs and silica condenses from the steam in those areas of the turbine. Partial evaporation of the precipitated silica can then occur with only a portion of the silica being dissolved by the continuous steam flow. Deposits remain as a result.Turbine Velocity. Another factor affecting the location of turbine deposits is the velocity in the turbine. Steam flows from the inlet to the outlet of the turbine in only a fraction of a second. Consequently, deposition is shifted downstream from the saturation point by the high steam velocities.Prevention of Silica DepositsThe most significant factor in minimizing turbine silica deposits is the maintenance of low silica concentrations in the boiler water. External treatment equipment must be operated carefully to limit the amount of silica entering with the makeup water, and the condensate must be monitored to minimize contamination. After silica enters the boiler water, the usual corrective action is to increase boiler blowdown (to decrease the boiler water silica to acceptable levels) and then to correct the condition that caused the silica contamination.
To produce 5 MW of electricity how much steam pressure is needed and water in relevancy. What temperature is needed to produce it and what size pipe should be piped into the steam turbine?
That is a question that does not have one single answer. For instance, if the pressure of the steam is raised, less steam is needed. As pressure rises, temperature will also rise due to adiabatic work done on the steam. Also, higher temperatures are needed at higher pressures to make sure the steam does not condense. Raising the temperature of the steam at a given pressure also means that less steam is needed to provide the same amount of energy. Efficiency will also vary, depending on the turbine, and other factors, such ascondenser vacuum. In general, running a pressure around 40 - 45 PSI, it will take 20,000 - 25,000 pounds of steam per hour to generate one megawatt of electricity during that hour. This is with steam that is just above saturation (around 285°F). So, for 5 MW, you'd need around 100,000 pounds of steam an hour. The pipe size would depend on the turbine. A 55 MW turbine (common for geothermal), might have two pipes bringing steam in (one per side), both of which are around 30" in diameter. For 100,000 pounds of steam an hour, much smaller pipes would suffice. However, expanding and then compressing the steam repeatedly is something you want to avoid. Note that these figures reflect more of a geothermal application. The pressure and temperature of steam from a boiler will typically be much higher.
Could you explain why connect gland steam area of HP turbine with reheat inlet line of IP TURBINE?
BECAUSE IF YOU DIDN'T TEMPERATURE AND PRESSURE DROPS WOULD ALREADY BE TOO BIG TO ALLOW 2 EXTRA STAGES OF TURBINES (IP AND LP'S). EVIDENTLY TO RE-CIRCULATE STEAM BACK TO BOILER AND ON TO IP TURBINE IS MORE COST-EFFECTIVE (I.E.: MAKES YOU GAIN MORE MONEY) THEN PERHAPS NOT BEING ABLE TO ADD ANOTHER 2 STAGES BUT ONLY ONE (I.E.: IP). THIS WAY YOU CAN MAKE SURE TO EXPLOIT ALL ENERGY OF THE STEAM FLOW. IF YOU DIDN'T REHEAT LOSSES WOULD BE GREATER THAN GAINS pleas be more clear in your answer and tll mw th benifet of the hp & lp glands
Where are the requirements for steam turbine maintenance jobs?
To find out more about steam turbine maintenance jobs specifications one would be advised to contact specialists from recruitment agencies or job centers.
Why there is tripping given in vacuum in thermal power station?
Generally the condenser in the power plants are designed to operate under vacuum. The specific volume of the steam is relatively higher than water. The steam coming from the exhaust of the turbine is cooled by the circulating water and the non combustibles are removed by the air removing equipment like ejectors or vacuum pumps. In case these equipment fail condensation of steam fails and it tries to occupy more volume. As the space in the condenser is limited it is pressurized and failure would happen. More over once the condenser is pressurized the flow through the turbine is reduced considerably which leads to churning of steam in the turbine which ultimately heats the turbine blades leading to failure. Hence a tripping of turbine is introduced which cuts of steam flow into the turbine and the condenser.
How much does a small steam turbine cost?
Small steam turbines can range in price from $5,000 to $50,000 depending on the size, capacity, and manufacturer. Additional costs for installation, maintenance, and accessories should also be taken into consideration when budgeting for a small steam turbine system.
What is the meaning of anchor point in terms of steam turbine?
I would suppose the "anchor point" would be the point where the turbine is firmly mounted to its base. The steam inlet, or steam chest, of a turbine is bolted to its foundation firmly, but the exhaust end of the turbine is mounted on sliding feet which allows it room to expand as it heats up. Often multiple casing turbines will have anchor points, or solid mountings for each casing section, and flexible couplings between each shaft section.
In thermal power generation part the steam came from turbine condensed and again resend to steam conversionIn this part my doubt is why return steam need to be cooled?
The low pressure steam from the last stage of the steam turbine is condensed so that it can be pumped back to the steam raising units at high pressure, as water. You can't compress steam as it would condense in the compressor. The only way to use steam as a gas in a gas turbine would be if it was supercritical, but this would mean operating at temperatures well above the limits for most engineering materials, and steam at these conditions would be very corrosive. This type of reactor cycle using a gas turbine has been considered using helium as the working fluid, and it may be built as the "pebble bed" reactor, or it may not. I think you need to understand more of thermodynamics. Read the Wikipedia entry for the "Rankine Cycle", see link below
Explain why throttling is a wasteful process and how the turbine can be used to reduce steam pressure for process work?
a turbine would equally reduce the pressure and gain output work whilst mere throttling would not be of any benefit
What is the use of latent heat in vaporization?
Calculating heat absorbed or released when any gas / liquid transformation takes place. I'm not an engineer, but I would imagine these calculations are performed in designing steam plants to make electricity. Water must be boiled, the steam runs thru a steam turbine, then it is condensed into water and is recycled ... boiledto steam ... thru turbine ... condensed etc.
What energy source powered the steam engine?
Other to coal I suppose you mean. Burning of any fuel like oil, wood, etc. Nuclear reactors. I suspect solar energy would make steam. It would be possible to use natural steam from deep in the ground.
What is the role of sealing steam in steam turbine?
"Our focus for this application is the point where the rotating shaft exits the steam turbine casing. At this point, atmospheric air is on one side of the casing and high or low- pressure steam is on the other side. High-pressure steam exists at one end of the turbine and steam under vacuum exists at the other end. Seals are used to keep the steam in and the air out, however some leakage occurs. If this leakage went unchecked, the moisture would create a humid, dripping environment resulting in rust of the equipment. Also, air would get into the turbine casing and reduce the condenser vacuum, and thus reduce the efficiency of the overall cycle." See http://www.apiheattransfer.com/en/Applications/Power-GlandSteamCondenserPackage.htm
Which process could be compared to how rushing steam turns a water wheel?
The process of rushing steam turning a water wheel can be compared to the concept of using a turbine to convert kinetic energy into mechanical energy. In this case, the steam would be the source of the kinetic energy, which is then harnessed to turn the water wheel, similar to how a turbine harnesses energy to generate electricity.
How do geothermal power plants generate electricity?
Geothermal power plants work in one of two ways.One way is that they drill wells into a geothermal reservoir and extract steam to be used in a turbine. If the reservoir is not quite hot enough, they might have to extract hot water, and flash it into steam by lowering the pressure. In either case, this steam is run through a turbine, which turns a generator to generate electricity. The steam is usually condensed and either used in the plant or reinjected into the ground.The other way some plants work is by using the geothermal steam to heat water contained in a closed loop. This water is turned into steam, and runs the turbine. The steam from the ground would be condensed and reinjected. This has the advantage of keeping the geothermal steam separate from the power plant.Note that other than the source of the steam, a geothermal power plant operates in much the same way most other power plants work. Using steam to turn a turbine, which turns a generator is a very common method. Notable exceptions would be wind farms, solar cells, and hydropower dams, among others.
How do geothermal power generate electricity?
Geothermal power plants work in one of two ways.One way is that they drill wells into a geothermal reservoir and extract steam to be used in a turbine. If the reservoir is not quite hot enough, they might have to extract hot water, and flash it into steam by lowering the pressure. In either case, this steam is run through a turbine, which turns a generator to generate electricity. The steam is usually condensed and either used in the plant or reinjected into the ground.The other way some plants work is by using the geothermal steam to heat water contained in a closed loop. This water is turned into steam, and runs the turbine. The steam from the ground would be condensed and reinjected. This has the advantage of keeping the geothermal steam separate from the power plant.Note that other than the source of the steam, a geothermal power plant operates in much the same way most other power plants work. Using steam to turn a turbine, which turns a generator is a very common method. Notable exceptions would be wind farms, solar cells, and hydropower dams, among others.
