Determination of entry length of a fluidized bed dryer using volumetric heat transfer coefficient

Abstract

Fluidized bed dryers are widely used in several fi elds of industry. Suffi ciently accurate thermal models provide an opportunity to increase the effectiveness of dryers. The required size of a fl uidized bed dryer can be defi ned with the application of mathematical model. This work is aimed at developing mathematical model to investigate the infl uence of operating parameters in a fl uidized bed dryer using volumetric heat transfer coeffi cient. After the defi ning the input parameters of the differential equations, the required entry length of the dryer which effective heat and mass transfer between gas and particles takes place can be estimated. The correct estimation of the entry length is useful in optimal design of a fl uidized bed dryer. Using the model the impact of the drying parameters can be determined to the required length. Keywords: fl uidized bed dryer, heat and mass transfer, volumetric heat transfer coeffi cient, mathematical model

Dynamical Behavior of a Heat Pump Coaxial Evaporator Considering the Phase Border’s Impact on Convergence

“…Kajtar and Kassai [12][13][14][15] dealt with computerized simulation of the energy consumption. Some further works [16][17][18][19][20][21] dealt with the same topics as in this paper, including mathematical modeling, numerical procedures, heat pump and heat pump heating-cooling system.…”