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How does steam actually power a turbine?

what from the steam physically makes the turbine spin ??

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  • 9 years ago
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    The steam turbine operates on basic principles of thermodynamics using the part of the Rankine cycle. Superheated vapor (or dry saturated vapor, depending on application) enters the turbine, after it having exited the boiler, at high temperature and high pressure. The high heat/pressure steam is converted into kinetic energy using a nozzle (a fixed nozzle in an impulse type turbine or the fixed blades in a reaction type turbine). Once the steam has exited the nozzle it is moving at high velocity and is sent to the blades of the turbine. A force is created on the blades due to the pressure of the vapor on the blades causing them to move. A generator or other such device can be placed on the shaft, and the energy that was in the vapor can now be stored and used. The gas exits the turbine as a saturated vapor (or liquid-vapor mix depending on application) at a lower temperature and pressure than it entered with and is sent to the condenser to be cooled.

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  • 9 years ago

    It is the steam moving that pushes on the propellers inside the turbine that turn it. You could do the same with air. But steam can build up a lot of pressure and so it turns the impellers easier.

    Have you ever put a fan outside the car window as it was moving down the road, and the fan started turning? That is the air turning the fan. The steam does the same thing, only inside the turbine and this turning of the impeller (called because it is inside), then turns the generator, which makes electricity.

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  • 3 years ago

    How Do Steam Turbines Work

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  • 9 years ago

    Steam expands and moves under pressure. The steam exerts this pressure on whatever is in it's path, pushing it. The turbine moves on a pivot under the pressure of the steam.

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  • 9 years ago

    Steam pressure is what is funneled into the turbine's vanes and this is what causes it to spin, creating the electricity.

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  • 9 years ago

    The fact that it's blasting over the turbine vanes at several times atmospheric pressure.

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