EDI utilizes the latest technology and vibration measurement tools to keep a variety of power generation equipment running smoothly. EDI can provide vibration solutions for natural gas turbines, steam turbines, reciprocating compressors, coal fired plants, nuclear plants, diesel engines and other power plant machinery. EDI also works with heat recovery steam generators (HRSG).
Services
- Field Measurements
- Torsional Vibration Analyses
Equipment
- Coal Fired
- Diesel Engines
- Gas Turbines
- Nuclear
- Reciprocating Compressors
- Steam Turbines
Expertise
Due to increased concern about air quality, coal plants are required to have bag houses. EDI has helped evaluate and design foundations and induced draft (ID) fan systems for such projects. The initial foundation design was reviewed by EDI to check for the dynamic characteristics such as natural frequencies, based on the supplied information for soil properties, water levels, etc. EDI also routinely performs torsional vibration analyses of variable frequency drive (VFD) motor driven ID fans.
Another power plant was experiencing foundation vibration of the ID fans. EDI performed shaker tests to evaluate the natural frequencies. The fans were also field balanced.
HRSG’s can have flow induced problems. EDI has evaluated pulsation and vibration levels on these units. HRSG’s use superheated water and pumps. EDI helped solve impeller failures at a power plant. Impeller modes were experimentally determined in the lab and correlated with field measurements.
Blade failures can occur in turbines. EDI tested blade natural frequencies and found a wide variation that could cause some to be coincident with blade passing. A test procedure was developed to reject blades with a natural frequency in the prohibited range. The mode shape was measured and related back to the failure location. EDI works with metallurgists to evaluate vibration failures.
EDI has been involved with several jobs at nuclear power plants. These included backup diesel engines, piping vibration, and the steam generator.
EDI solved torsional vibration problems with engines running on heavy fuel at a power plant. Engine crankshaft failures were related to improper counter-weights installed in the engine causing operation at resonance.
EDI has helped monitor and field balance large steam turbines during startup. Natural gas power plants with gas turbines or combined cycle units. Two gas turbines with waste heat from exhaust powering third steam turbine.
