Local and average heat transfer coefficients of coke bed in a coke dry quenching chamber

According to the features of coke bed heat transfer in a coke dry quenching (CDQ) chamber, an experimental setup of CDQ chamber heat transfer was established to test the primary parameters such as coke size and cooling gas flow. In order to deal with experimental data effectively, the average heat transfer coefficient was redefined and its dimensionless equation was deduced. The local heat transfer coefficient of coke bed was numerically analyzed based on the inverse heat conduction problem in the single coke. The experimental data show that the change law of average heat transfer coefficient is similar to that of local heat transfer coefficient. Both of them increase with increasing fluid flux and are sensitive to coke size, and the smaller the coke size, the larger the heat transfer coefficients.