Heat transfer mechanism between fluidized bed and its walls (in relation to the heat transfer of heat exchanger in the fluidized bed) 2.
نویسندگان
چکیده
منابع مشابه
Bed Voidage and Heat Transfer in Non-Newtonian Liquid-Solid Fluidized Bed
The presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. Moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. The aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coeff...
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The purpose of this study is numerical modeling of temperature variation of phases in a two phase regime in fluidized bed dryers including particles belonging to Group D of geldart classification. The mass transfer between phases is not taken into consideration in this modeling which has been assumed in three- dimensional, unsteady, and two-phase regime.To verify the modeling we consider the do...
متن کاملbed voidage and heat transfer in non-newtonian liquid-solid fluidized bed
the presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. the aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coefficie...
متن کاملStudy of Heat Transfer in the Poly Ethylene Fluidized Bed Reactor Numerically and Experimentally
In this research, heat transfer of a poly Ethylene fluidized bed reactor without reaction were studied experimentally and computationally at different superficial gas velocities. A multifluid Eulerian computational model incorporating the kinetic theory for solid particles was developed and used to simulate the heat conducting gas–solid flows in a fluidized bed configuration. Momentum exchange ...
متن کاملNumerical Calculation of Wall - to - Bed Heat - Transfer Coefficients in Gas - Fluidized Beds
A computer model for a hot gas-fluidized bed has been developed. The theoretical description is based on a two-fluid model ( TFM) approach in which both phases are considered to be continuous and fully interpenetrating. Local wall-to-bed heattransfer coefficients have been calculated by the simultaneous solution of the TFM conservation of mass, momentum and thermal energy equations. Preliminary...
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ژورنال
عنوان ژورنال: Journal of the Society of Powder Technology, Japan
سال: 1984
ISSN: 0386-6157,1883-7239
DOI: 10.4164/sptj.21.699