Experimental studies of heat transfer between a bundle of horizontal tubes and a gas-solid fluidized bed of small particles

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · Ind. Eng. Chem. Process Des. Dev.; (United States)

DOI:https://doi.org/10.1021/i200022a005· OSTI ID:5534319

Grewal, N S; Saxena, S C

Experimental data were obtained for the heat transfer coefficient between electrically-heated horizontal tube bundles and square fluidised beds of silica sand and alumina as a function of air fluidising velocity. Heat transfer data for a bundle of tubes are compared with a single tube under otherwise identical conditions, and are compared with existing correlations and theoretical models in the literature for maximum heat transfer coefficient. A correlation for the maximum heat transfer coefficient between horizontal tube bundles and a gas-solid fluidised bed of small particles is proposed which includes the influence of tube pitch in the bundle. This correlation will be particularly useful in the design of a low-rank coal fluidised-bed combustor where crushed coal is burnt in an inert bed of silica sand or alumina of particle size less than 1 mm.

• OSTI ID: 5534319
• Journal Information: Ind. Eng. Chem. Process Des. Dev.; (United States), Vol. 22:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
FLUIDIZED-BED COMBUSTORS
HEAT TRANSFER
ALUMINIUM OXIDES
COAL
COMPARATIVE EVALUATIONS
CORRELATIONS
FLUIDIZATION
FLUIDIZED BED
PARTICLE SIZE
SAND
SILICA
TUBES
VELOCITY
ALUMINIUM COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
COMBUSTORS
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
MATERIALS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SIZE
014000* - Coal
Lignite
& Peat- Combustion