Journal ArticleDOI
Emulsion phase residence time and its use in heat transfer models in fluidized beds
Taner F. Ozkaynak,John C. Chen +1 more
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In this article, the root-square-mean residence times were used in a modified packet model to predict effective heat transfer coefficients, and the model was applied to a vertical tube in fluidized beds.Abstract:
Heat transfer from a vertical tube in fluidized beds was investigated by measurement of emulsion packet residence times. The root-square-mean residence times were then used in a modified packet model to successfully predict effective heat transfer coefficients.read more
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Numerical calculation of wall‐to‐bed heat‐transfer coefficients in gas‐fluidized beds
TL;DR: In this article, a computer model for a hot gas-fluidized bed has been developed based on a TFM approach in which both phases are considered to be continuous and fully interpenetrating, and local wall-to-bed heat-transfer coefficients have been calculated by the simultaneous solution of the TFM conservation of mass, momentum and thermal energy equations.
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Heat transfer and bubble characteristics in a fluidized bed with immersed horizontal tube bundle
TL;DR: In this paper, the effect of gas velocity on the average and local heat transfer coefficients between a submerged horizontal tube (25.4 mm-OD) and a fluidized bed has been determined.
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Heat transfer in fluidized beds: design methods
TL;DR: In this article, a mechanistic model that incorporates the key factors influencing heat transfer, assumes fully developed transfer, and utilizes results from large-scale units is recommended for industrial-scale circulating beds.
Journal ArticleDOI
Microencapsulated phase-change materials as heat transfer media in gas-fluidized beds
TL;DR: In this paper, the authors investigated microencapsulated phase-change materials as heat transfer media in gas-fluidized beds, including shells of polymethylene-urea, cross-linked nylon, and gelatin and cores of octadecane and paraffin.
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Investigation of heat transfer between a horizontal tube and gas–solid fluidized bed
TL;DR: In this article, a cluster-based model has been proposed to predict the heat transfer coefficient from the fluidized bed to a horizontally immersed tube, and a close agreement was found between the model predictions and the experimental findings.