Heat-transfer from single horizontal tubes in fluidized beds: Influence of tube diameter, moisture and diameter-definition by Geldart C fines content

Effects of particle size and bubbling behavior on heat transfer in gas fluidized beds

“…The simulations were compared to an experimental rig conducted by Olsson and Almstedt [12] to measure the local instantaneous bed-totube HTC in a cold pressurized laboratory-scale fluidized bed. An experimental study was conducted by Merzsch et al [10] to investigate heat transfer in fluidized beds with a single horizontal tube using extreme poly-dispersed materials. In industries, this kind of pressurized steam fluidized bed was commonly used for drying of lignite.…”

Modeling the Heat Transfer Coefficient Between a Surface and Fixed and Fluidized Beds With Phase Change Material

“…where Ar is the Archimedes number. This correlation has been accepted by many researchers as a good estimation of the gas convective coefficient over a wide range of fluidizing conditions [24,[60][61][62][63][64][65]. The contribution from the gas phase will be low due to the lower thermal conductivity of the gas phase compared to the dense phase.…”

Heat transfer process in gas–solid fluidized bed combustors: A review

“…However, the reliable prediction of the heat transfer behavior in a certain fluidized system requires knowledge of many interacting factors such as the size of fluidization vessel, the design of the fluid distributor and vessel internals, and the operating temperature and pressure [20]. Heat transfer between a bed and immersed surfaces in BFBC is influenced by many factors, such as superficial fluidizing velocity [21][22][23][24][25], particle size and its packed density [23,26], thermo-physical properties of particle and gas [17,26], the shape, size and placement of the immersed surfaces [20,22,27,28], size of FBC [29], and the type of the gas distributor. Table 1 shows literature data from previous studies related to heat transfer between a bed and immersed surfaces in bubbling fluidized bed.…”