Abstract: | The temperature of carbon particles undergoing combustion in a fluidized bed is measured. Heat-transfer laws are ascertained.Notation
a
diffusivity of air
- c
heat capacity of air
- D
diffusion coefficient of oxygen in air
- d0, d
initial and running diameters of carbon sphere
- di
diameter of inert particles
- k
rate constant for carbon monoxide combustion
- q
calorific value of carbon oxidation to CO2
- T
temperature difference between burning particle and fluidized bed
- X, Xn
oxygen concentration in the fluidized bed and on the surface of the burning particle
- Z, Zn
running concentration of carbon monoxide and concentration on the surface of the burning particle
-
heat-transfer coefficient between fluidized bed and burning particle
- m
maximum heat-transfer coefficient between fluidized bed and a stationary body submerged in the bed
-
masstransfer coefficient between fluidized bed and burning particle
-
thermal conductivity of air
-
kinematic viscosity of air
- 0, gr, 4
density of oxygen, air, and inert material
-
relative thickness of burning gas layer
-
relative thickness of diffusion boundary layer
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 42, No. 1, pp. 21–27, January, 1982. |