The averaged heat transfer coeffici

The averaged heat transfer coefficients were computed from the raw data coming from 12 performance tests at anindustrial CFB unit. The packed renewal model offers a convenient way to investigate the impact of key variables on heat transfer in bubbling fluidized beds with Geldart B powder. It was found that the model was satisfactory for all mean bed particle sizes. The average heat transfer coefficient heavily depended upon mean particle size, particle concentration in vicinity of tube surface, bed temperature and also fluidization quality. An effort is made here to develop a correlation for large scale fluidized bed heat exchangers which can be used to predict havg with success. Moreover, a few empirical correlations with satisfactory good fit computational results obtained from a mechanistic model were developed. The obtained correlation functions areapplicable to a wide range of Sauter mean particle diameters, similar fluidization conditions and also staggered tube bundles. These empirical correlations can be useful for engineering design or heat transfer characteristics in fluidized bed heat exchangers with horizontal tube bundles.