Remote temperature measurements of a cold start-up on a low pressure steam turbine using phosphor thermography
- Fluorescience Inc., Knoxville, TN (United States)
- Tennessee Technological Univ., Cookeville, TN (United States). Center for Electric Power
- Tennessee Valley Authority, Chattanooga, TN (United States)
The feasibility of using a noncontact, optical method for temperature measurement based on thermographic phosphors was explored during the cold start-up of a low pressure turbine rotor at the TVA Cumberland Steam Plant. A simple optical system delivered low power laser light to a segment of the balance rim and balance weight holes which were coated with phosphor. From analysis of the laser induced fluorescence, temperatures ranging from 37C (99 F) to 121 C (250 F) were determined. There was no discernible condensation of steam on the viewing port optics. This transient temperature history at the exit end of the LP rotor may help to determine the root cause of a recent blade failure experienced in the L-0 blade row of a unit at this plant during an overspeed test.
- OSTI ID:
- 207810
- Report Number(s):
- CONF-951010--; ISBN 0-7918-1488-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laser-induced fluorescence of phosphors for remote cryogenic thermometry
Cumberland last stage blade failure investigation