IEA Grimethorpe 2 x 2M PFBC facility: turbine materials testing in a cascade loop

Conference · Fri Jun 01 04:00:00 EDT 1984 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:6523579

Minchener, A J; Anderson, J S; Erbe, G; Mainhardt, P J; Mc Carron, R L; Mountford, R A

The Grimethorpe pressurised fluidised bed combustor (PFBC) facility of the International Energy Agency is equipped with an off-gas loop in which gas turbine blades are being exposed to assess the potential for erosion, corrosion, or deposition in a PFBC gas turbine. The flue gas from the PFBC is passed through four stages of cyclones before entering the cascade test section. Depending on operating conditions, the loop passes between 5.0 and 6.4 kg/sec of gas, which allows aerofoils of about the same size as the General Electric MS 1002 turbine blading to be tested. The cascade contains four stages of nine blades each, as well as three erosion targets. The first three stages are impulse blades and experience a gas velocity in the range 200 to 230 m/sec, while the fourth stage of reaction aerofoils accelerates the gas to between 300 and 400 m/sec before it passes over the erosion targets. Both uncooled (700-850/sup 0/C) and cooled (500-650/sup 0/C) blades are used. Results from initial running of the cascade loop have indicated a dust loading to the cascade of the order of 100 ppm, with median particle sizes in the range of 1 to 2 microns, and an average alkali level (K plus Na) of 1.1 ppm. The blades exhibited the aerodynamically-expected pattern of behaviour, and the results are generally considered encouraging. The continuing overall test program design is discussed.

• Research Organization: National Coal Board, Coal Research Establishment, Cheltenham, Gloucestershire
• OSTI ID: 6523579
• Report Number(s): CONF-840611-
• Conference Information: Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Journal Volume: 84-GT-291
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
CHEMICAL REACTIONS
COMBUSTORS
CORROSION
EROSION
FLUE GAS
FLUIDIZED-BED COMBUSTORS
GAS TURBINES
GASEOUS WASTES
MACHINERY
MATERIALS TESTING
SCALING
TEST FACILITIES
TESTING
TURBINE BLADES
TURBINES
TURBOMACHINERY
WASTES