An investigation on instantaneous local heat transfer coefficients in high-temperature fluidized beds—II. Statistical analysis

Abstract

Statistical analysis is employed to make a further insight into the nature of instantaneous local heat transfer coefficients obtained in Part 1 of this paper. The computed functions from these coefficients are the variance, autocorrelation function and power spectral density function. These functions and parameters have been employed to characterize the dynamic behaviors around the immersed horizontal tube and thus to investigate the mechanism of bed-to-tube heat transfer in high temperature fluidized beds. The bubble phase heat transfer component is separated from instantaneous local heat transfer coefficients, and is found to be increased approximately exponentially with increasing bed temperature.