engleski

Analysis of temperal and spatial temperature gradients at pronouncedly fluctuating cooling conditions

Realised cooling velocities of a probe (cylinder) at discrete radius points during cooling at pronouncedly fluctuating cooling conditions are presented.. Submerging the probe into an air - corundum (Al2O3) fluidised system of insufficient cooling capacity imposes the fluctuating cooling conditions. The particle have average granulation of 95 microns ; the cylindrical probe beneth its surface are measured with built- in thermocaples. The thermcaples have a very high sensitivity, which enables temperature variation recording according to the cooling dynamics. The relevant cooling time is 125 seconds. The temperature changes in discrete points of the cylinder radius are determined by control volume method. The calculation results indicate a shift of the maximum cooling velocity towards the interior of the cylinder.

luidized bed; cooling velocity; cylinder probe; experimental data; fcontrol volume method

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