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Language: English Portuguese
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Training Time: 15 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese
The steam turbine generators used today produce approximately 85% of the electricity in the United States. In a typical turbine, steam flows in at a speed near 100 miles per hour and at temperatures from 400 to 950 degrees Fahrenheit. This course describes the differences between Impulse and Reaction turbines, how steam turbines are classified, and some typical operational issues associated with steam turbines.
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The following key questions are answered in this module:
What is the scientific theory behind steam turbine operation? According to the 1st Law of Thermodynamics, energy is neither created nor destroyed; it can only be changed from one form to another.
What are the major components of a steam turbine? A casing; a rotor; fixed and moving blades; diaphragms; journal bearings; thrust bearings; shaft seals; an inlet valve or vales; and a speed-regulating device.
What are the two types of steam turbine designs? Impulse and reaction. Impulse designs operate by a rotor turning due to the force of the steam striking the blades, while reaction designs operate on the principle that the rotor derives its rotational force from the steam exiting the blades.
What are some different types of steam turbine protective devices? Overspeed trip; sentinel valves; high vibration trip; low lube oil trip; high temperature trip; low vacuum trip; and thrust bearing failure trip.
Below is a transcript of the video sample provided for this module:
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