Measurements of Heat Transfer Coefficients between Gas and Particles for a Single Sphere and for Moving Beds.

For obtaining the convective heat transfer coefficient between gas and particles at high temperature, heat transfer experiments and mathematical model simulation were carried out both for a single sphere and for a counter-current moving bed.If the radiative heat transfer should be evaluated quantitatively, the convective heat transfer coefficient based on the previously empirical equations reported by Ranzand other researchers were available for the evaluation of convective heat transfer around a single sphere.Fromthe experiments andthe mathematical modelsimulation with heat transfer of the moving bed, the following empirica[ equation was obtained as the equation for determining the convective heat transfer coefficient in the moving bed.Nu = 2. O+ 0.39Re'pl•pr* l-