Wall-to-bed heat transfer in circulating fluidized beds

Journal Article · Sat May 01 00:00:00 EDT 1999 · International Communications in Heat and Mass Transfer

DOI:https://doi.org/10.1016/S0735-1933(99)00035-4· OSTI ID:355632

Fox, W B; Grewal, N S; Moen, D A ^[1]

---

1. Univ. of North Dakota, Grand Forks, ND (United States). Mechanical Engineering Dept.

Circulating fluidized beds (CFBs) have become increasingly important in recent years for coal combustion and gas-solid reactions. Here, heat transfer from the wall of a circulating fluidized bed to the fast bed suspension has been investigated for several materials. The range of investigation includes dense and dilute phase fast fluidization and pneumatic transport. The overall heat transfer coefficient was found to be a function mainly of cross-sectional average suspension density. Effects of superficial velocity and solids mass flux were obscured by their interrelationship to the suspension density. Two models from the literature are evaluated using present and published data.

• OSTI ID: 355632
• Journal Information: International Communications in Heat and Mass Transfer, Journal Name: International Communications in Heat and Mass Transfer Journal Issue: 4 Vol. 26; ISSN 0735-1933; ISSN IHMTDL
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CIRCULATING SYSTEMS
FLUIDIZED BED BOILERS
FLUIDIZED BEDS
HEAT TRANSFER
MATHEMATICAL MODELS
SUSPENSIONS