An Instrument for Local Radiative Heat Transfer Measurement Around a Horizontal Tube Immersed in a Fluidized Bed

An instrument for the measurement of the radiative component of total heat transfer in a high-temperature gas fluidized bed is described. The main objective of this paper is to emphasize the design, instrumentation, and calibration of this device. The results are presented and discussed elsewhere (A...

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Bibliographic Details
Published in:Journal of heat transfer 1990-05, Vol.112 (2), p.486-491
Main Authors: Alavizadeh, N, Adams, R. L, Welty, J. R, Goshayeshi, A
Format: Article
Language:English
Subjects:
420400 - Engineering- Heat Transfer & Fluid Flow
440500 - Thermal Instrumentation- (1990-)
CALIBRATION
CAVITIES
COMBUSTORS
DESIGN
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELEMENTS
ENERGY TRANSFER
ENGINEERING
Exact sciences and technology
FLUIDIZED BEDS
FLUIDIZED-BED COMBUSTORS
Fundamental areas of phenomenology (including applications)
HEAT FLUX
HEAT TRANSFER
MEASURING INSTRUMENTS
OTHER INSTRUMENTATION
PHYSICAL PROPERTIES
Physics
RADIANT HEAT TRANSFER
SEMIMETALS
SILICON
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TUBES
VERY HIGH TEMPERATURE
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Summary:An instrument for the measurement of the radiative component of total heat transfer in a high-temperature gas fluidized bed is described. The main objective of this paper is to emphasize the design, instrumentation, and calibration of this device. The results are presented and discussed elsewhere (Alavizadeh, 1985; Alavizadeh et al., 1985). The design makes use of a silicon window to transmit the radiative heat flux to a thermopile-type heat flow detector located at the base of a cavity. The window material thermal conductivity is sufficiently large to prevent conduction errors due to the convective component of total heat transfer. Also, its transmission and mechanical hardness are well suited for the fluid bed environment. The device has been calibrated using a blackbody source both before and after exposure to a fluidized bed, indicating the effect of the abrasive bed environment on performance. The instrument has been used to measure local radiative heat transfer around a horizontal tube. Typical results for a particle size of 2.14 mm and a bed temperature of 1050 K are presented and discussed to illustrate instrument performance.
ISSN:0022-1481
1528-8943
DOI:10.1115/1.2910404