| Abstract: | A detailed methodology is presented for the design of small-scale fluidized-bed furnaces (SSFBF) in the 15–250 kW capacity range for domestic space and hot water heating. These bubbling fluidized-bed furnaces burn a beneficiated coal-water slurry mixture, and do not have heat exchange tubes in the bed or freeboard regions. Algorithms are developed, based on this methodology, to calculate furnace design and performance parameters. The heat transfer coefficients are calculated for the dense bed and freeboard of the SSFBF. These are then compared with theoretical and experimental heat transfer coefficients in the published literature. Excellent agreement is found between those in the SSFBF and those in the literature. The finding of this work is that the methodology and the heat transfer coefficients obtained provide excellent design tools for the scale-up of bubbling fluidized-bed furnaces in the 15–250 kW range. |
