What's the difference between a gas turbine and a steam turbine?

Question

If I want to build a powerplant which one do I choose.

Answer 1

Gas turbine, run on gas.
Steam turbine runs on steam. If you decide on steam, you have build a boiler and keep feeding it to make the steam.
The Gas, You still have to build or by a gas boiler, but not as big as the steam boiler!!

Answer 2

Gas Turbine And Steam Turbine

Answer 3

Steam turbines rotate in the currents caused by the hot water vapour. They form part of a closed water cycle in which water condenses and is then heated until it evaporates again. Steam turbines therefore do not come into contact with the fuel deployed and work at temperatures between 500 and 650 °C. Several steam turbines are often arranged in a row so that – configured for high, medium and low pressure – they are able to optimally convert the respective steam pressure into rotational movement.

Gas turbines on the other hand rotate directly in the hot combustion gases. With temperatures up to 1500 °C, these gases are much hotter than those in steam turbines. For this reason the blades are cooled with air that flows out of small openings and creates a “protective film” between the exhaust gases and the blades. Without cooling, the blade material would quickly wear out.


https://www.electrikals.com/

Answer 4

A gas turbine is basically a jet engine. It is, however, built so that most of the available power is produced in a rotating shaft rather than in thrust.
A steam turbine uses steam produced in a boiler that can be heated by a variety of fuels.
Steam turbines can be built very much larger than gas turbines and greater efficiencies can be realized.
Gas turbines can be started up very quickly from cold, Steam turbines cannot (it takes a while to get the boilers up to temperature and pressure.

Gas turbines are good for situations where we need standby power generation or generation to cope with peak loads. Steam turbines are best suited to the continuous generation of very large amounts of energy.

Answer 5

1

Answer 6

I understand your question....steam is a vapor. However in the case of a steam turbine, the specified gas is water vapor.

It common now to use exhaust gases from the combustion of methane or other fuels to turn a turbine. This is essentially the same type of turbine used in a modern jet engine. But it's not uncommon to use gas turines to turn the shaft on electrical gnerators. In this application, the jet engine, or gas turbine is coupled to a shaft that rotates the electrical generator. Then the exit gas is used to heat water to make steam and that steam is used to push what is commonly called a helper turbine.

By doing this, you can improve the energy efficiency of the power cycle.

Other applications of gas turbines include what is commonly called a "turbocharger" on a car engine. These are common on race cars to increase the horsepower of the engine. In this application, the exhaust from the car engine is used to turn a turbine that compresses air and allows you to push more air and fuel into the piston chamber.

Bottom line, is a steam turbine and a gas turbine are essentially the same thing....one just uses water in the form of steam and the other uses some type of high pressure gas.

Answer 7

• Steam turbine uses high pressure steam as the working fluid, while the gas turbine uses air or some other gas as the working fluid.
• Steam turbine is basically an expander delivering torque as the work output, while a gas turbine is a combined device of compressor, combustion chamber, and turbine executing a cyclic operation to deliver work as either torque or thrust.
• Steam turbine is only a component executing one step of the Rankine cycle, while gas turbine engine executes the whole Brayton cycle.
• Gas turbines can deliver either torque or thrust as the work output, while steam turbines almost all the time delivers torque as the work output.
• The efficiency of the gas turbines is much higher than the steam turbine due to higher operating temperatures of the gas turbines. (Gas turbines ~1500 0C and steam turbines ~550 0C)
• The space required for the gas turbines is much less than steam turbine operation, because steam turbine requires boilers and heat exchangers, which should be connected externally for heat addition.
• Gas turbines are more versatile, because many fuels can be used and working fluid, which has to be fed continuously, is readily available everywhere (air). Steam turbines, on the other hand, require large amounts of water for the operation and tend to cause problems in lower temperatures due to icing.

http://mda139.net/steamturbine/index.html

Answer 8

Gas turbines are designed to run off the exhaust gasses from combustion, and necessarily run at very high temperatures. Because of this, their initial cost and maintenance costs are higher than the costs for the same capacity steam turbine.

On the other hand, steam turbines generally require high pressure steam boilers, so you have the maintenance of the boiler system as well as ther turbine to consider.

Answer 9

A gas turbine is exactly that and is driven by burning gas
Steam turbine ,water is heated to produce steam and steam drives the turbine.

Answer 10

If you are planning to start on your woodworking project, this isn't something you should use, it's something that you would be insane not to. Go here https://tr.im/dOHHk
Truth is, I've been a carpenter for almost 36 years, and I haven't found anything like this for less than 10's of thousands of dollars.