Heat transfer studies in fine particle fluidized beds
Experiments were carried out to determine the heat transfer coefficient between fluidized beds and immersed fine, freely moving wires. The wires varied in diameter from 50-810 ..mu..m, and were made of Alumel, while the bed material consisted on uniformly sized sand, aluminum, polyethylene and glass beads, from 105 to 754 ..mu..m. Each wire was approximately 20 cm long, was totally immersed in a bed 14 cm ID, and was heated by an electric current. The current and voltage drop across the wire were measured independently and from these measurements the heat transfer coefficient and wire temperature were determined. Results indicate that for wires and bed particles of the same diameter the heat transfer coefficient is greater than for wires in air alone. This result supports the argument than a limiting Nusselt number exists for gas-particle heat transfer in fluidized beds.
- Research Organization:
- Dept. of Chemical Engineering, Oregon State Univ., Corvallis, OR 97331
- OSTI ID:
- 6417478
- Report Number(s):
- CONF-861146-; TRN: 87-023671
- Resource Relation:
- Conference: AIChE winter annual meeting, Miami, FL, USA, 2 Nov 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLUIDIZED BEDS
ELECTRIC HEATING
HEAT TRANSFER
ALUMINIUM
ALUMINIUM ALLOYS
DIMENSIONS
ELECTRIC CURRENTS
GAS FLOW
GLASS
MEASURING METHODS
NUSSELT NUMBER
PARTICLE SIZE
POLYETHYLENES
SAND
TEMPERATURE MEASUREMENT
THERMODYNAMICS
VOLTAGE DROP
WIRES
ALLOYS
CURRENTS
ELEMENTS
ENERGY TRANSFER
FLUID FLOW
HEATING
METALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
SIZE
420400* - Engineering- Heat Transfer & Fluid Flow