Erosion of heat exchanger tubes in fluidized beds
This final report describes the activities of the 3-year project entitled Erosion of Heat Exchanger Tubes In Fluidized Beds.'' which was completed at the end of 1990. Project accomplishments include the collection of a substantial body of wear data In a 24in. [times] 24in. fluidized bed, comparative wear results In a 6in. [times] 6in. fluidized bed, the development of a dragometer and the collection of a comprehensive set of drag force data in the 24in. [times] 24in. bed, Fast Fourier Transform (FFT) analysis of bubble probe data to establish dominant bubble frequencies in the 24in. [times] 24in. bed, the use of a heat flux gauge for measurement of heat transfer coefficients in the 24in. [times] 24in. bed and the modeling of the tube wear in the 24in. [times] 24in. bed. Analysis of the wear data from the 24in. square bed indicates that tube wear increases with increase in superficial velocity, and with increase in tube height. The latter effect is a result of the tubes higher up in the bed seeing greater movement of dense phase than tubes lower down In the bed. In addition, tube wear was found to decrease with increase in particle size, for constant superficial velocity. Three models of tube wear were formulated and provided acceptable prediction of wear when compared with the experimental data.
- Research Organization:
- West Virginia Univ., Morgantown, WV (United States). Dept. of Mechanical and Aerospace Engineering
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC21-87MC24207
- OSTI ID:
- 6815466
- Report Number(s):
- DOE/MC/24207-3136; ON: DE93000220
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
EROSION
FLUIDIZED BEDS
HEAT EXCHANGERS
HEAT FLUX
HEAT TRANSFER
LEVELS
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE SIZE
PROGRESS REPORT
TUBES
VELOCITY
WEAR
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DATA
DOCUMENT TYPES
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
OXIDATION
SIZE
THERMOCHEMICAL PROCESSES
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