Heat transfer at high temperatures in a PCFB

Because of the rarity of heat transfer data in the literature, the exploration of pressurized circulating fluidized bed (PCFB) systems as components of combined cycle systems, which could lead in the development of the next generation of high efficiency power plants, has been slowed. The present work describes measurement of heat transfer in a bench scale PCFB operated at three bed temperatures, four different pressures, two particle sizes, and difference suspension densities and superficial velocities. The heat transfer coefficients calculated from the experimental data show dependence on bed temperature, operating pressure, suspension density, and particle size. This behavior and the heat transfer coefficient values obtained correlate with the limited literature picture and should help system designers trying to integrate PCFBs into their designs.