DRYING'91

edited by A.S. Mujumdar
I. Filkova

ELSEVIER, Amsterdam - London - New York - Tokyo 1991
PREFACE v
Section I
KEYNOTE LECTURES
Heat and Mass Transfer in Polymer and Gel Drying
M.A. Roques
1
Physical Structure and Quality of Dehydrated Foods
M. Karel
26
Selected Aspects of Drying of Biotechnological Products
C. Strumillo, A.S. Markowski and J. Adamiec
36
Impact of Spray Dryer Design on Powder Properties
K. Masters
56
Spray Drying of Non-Newtonian Liquids
I. Filkova
74
Section II
DRYING THEORY AND MODELLING
Saturation Dependent Effective D'Arcy Permeabilities in 3-D Random Irregular Voronoi Networks
N.A. Vrettos, H. Imakoma and M. Okazaki
84
The Role of Species Momentum Equation in the Drying Processes
S. Whitaker
97
Drying of Highly Shrinking Products: Application to Gels
W. Jomaa, W. Aregba, J.R. Puiggali and M. Quintard
110
Modelling of Drum-Drying
J. Vasseur, F. Abchir and G. Trystram
121
Material Model for Fluidised Bed Drying
K.A. McKenzie and R.E. Bahu
130
Modelling of Impregnating, Drying and Thermal Treating of Fibrous Materials
V.I. Konovalov, A.G. Dvoinin, V.N. Zatona and E.N. Tugolukov
142
Simulation of Drying-Grinding Process for Dispersed Materials
S. V. Fedosov
154
Section III
DRYING KINETICS STUDIES
Studies of the Drying Process by NMR Imaging
J.E. Maneval, M.J. McCarthy and S. Whitaker
170
Drying Curves - A General Process for their Representation
A. Lebert and J.-J. Bimbenet
181
Application of Drying Kinetics Investigation to the Determination of Average Heat Transfer Coefficient in Biosynthesis Materials
E. Mitura, W. Kamiñski and S. Michalowski
191
Drying Kinetics of Particles from Thin Layer Drying Experiments
T.A.G. Langrish, R.E. Bahu and D. Reay
196
Studies of Air Drying by a Two-Component Solid Desiccant Material in a Rotary Packed Bed Dehumidifier
I. Borde, E. Korin and R Eliasy
207
Section IV
DRYING OF PARTICULATE MATERIALS
Modelling Vertical Pneumatic Conveying Dryers
I.C. Kemp, RE. Bahu and D.E. Oakley
217
'Analysis and Simulation of a Rotary Dryer. The Effect of Flight and Gas Mixing
G. Riquelme and R Benavides
228
Freeze-Drying under Vacuum and in an Adsorbing Fluidized Bed: Influence of Operating Pressure on Drying Kinetics
E. Wolff and N. Gibert
237
Numerical Simulation of Fluidized Bed Drying Processes
M.B. Stakic and D.Z. Milojevic
247
Experimental Determination of Transport Coefficients in Two-Component Fluid Bed Driers
G. Donsi and G. Ferrari
258
Convection Drying of Particle Swarms with Real Particle Distributions
H. Roth, E.-G. Hencke and K Geier
270
Drying in Cyclones - An Experimental Study
M. Aparecida Silva and S. Azucena Nebra
281
Infrared/Conductive Drying and Thawing of Minerals and Granular Materials
N. Bedard
292
Section V
DRYING SUSPENSIONS AND PASTES
Spray/Gas Mixing Behaviour Within Spray Dryers
D.E. Oakley and R.E. Bahu
303
The Air-Pumping Behaviour of Rotary Atomizers
R B. Keey, S.S Enevoldsen and C. Werner
314
Two Stage Drying of Synthetic Detergents
G.J. Kaminsky
325
Study of Drying Process on Inert Particles in a Mechanically Spouted Bed Drier
T. Szentmarjay, A. Szalay, E. Pallai and Z. Ormos
334
Fluid-Mechanical and Thermal Characteristics of Spout-Fluid Drier with a Draft Tube
D.S. Povrenovic, Z.B. Grabvcic, Dz.E. Hadzismajlovic, D.V. Vukovic and N. Littman
343
Kinetics of Drying in Drum-Drying
J. Vasseur, R Kabbert and A. Lebert
352
Section V
DRYING OF FOODSTUFF
A Compartment Model to Describe Drying Curves of Foodstuffs under Variable Conditions
J.C. Laguerre, A. Lebert, G. Trystram and J.-J. Bimbenet
361
Evaluation of Selected Mathematical Models for Grain Drying
M. Parti
369
Optimisation of the Impulse Method of Thermal Properties Determination in Agricultural Products
H. Lis, T. Lis and J. Senyk
379
Heat and Mass Transfer in Bread during Baking in an Electric Oven
M. Hasatani, N. Arai, H. Katsuyama, H. Harui, Y. Itaya, N. Fushida and N. Tatsukawa
385
Near-Optimum Heating Profiles in Freeze-Drying in Accordance to the Transport Parameters and Product Nature
J.I. Lombrana, R Mijangos, F. Varona and M.C. Villaran
394
A Mathematical Modelling of Heat Transfer in Freeze Drying
J. Nastaj
405
Section VII
DRYING GRAINS, FRUITS AND VEGETABLES
Through-Circulation Microwave Drying of Corn
U.S. Shivhare, G.S.V Raghavan, T. Kudra, A.S. Mujumdar and F.R. van de Voort
414
Investigations into Moisture Transport Parameters in Wheat Grain using D2O as Labelled Water
B. Aramowicz, B. Adamczyk and A. Musur
423
Drying Lucerne in a Thick Layer
J. Jilek
435
Air Flow in a Corn Drier
L Sun, G. Arnaud and J.-P. Fohr
447
Drying Kinetics of a Majorcan Seedless Grape Variety
A. Berna, C. Rossello, J. Canellas and A. Mulet
455
Simulation of Cyanoglucosidic Compounds Elimination in Cassava during Drying
J.A. Monroy-Rivera, A. Lebert, C. Marty, J. Muchnik and J.-J. Bimbenet
463
Air Drying of Fruit: Effects of Different Pre-Treatments on Drying Rate and Product Quality
D. Barbanti, D. Mastrocola, G. Pinnavaia, C. Severini and M. Dalla Rosa
471
Simultaneous Puffing and Dehydration of Osmotically Pre-treated Apple Cubes in a High Temperature Fluidized Bed (HTFB) Drier
D. Torreggiani and R.T. Toledo
483
Effect of Saccharose on Water Sorption and Rehydration of Dried Carrot
A. Lenart
489
A New Drying Method of Fruits and Vegetables - Quality Improvement of the Final Product
E. Kompany, K. Allaf, J.M. Bouvier, P. Guigon and A. Maureaux
499
Section VIII
DRYING OF WOOD
The Drying of a Wood Plank below Boiling Point. Influence of Internal Gaseous Pressure in 1D and 2D
N. Ouelhazi, G. Arnaud and J.-P. Fohr
507
Air Permeability Coefficients of Birch, Pine, Spruce and Birch Plywood
H. Koponen
518
Solvent Drying of Wood - Some Results
J.G. Salin
529
The Optimization of Humidity Conditions in Timber Drying Kilns Using Heat Pump Dehumidifiers
M. Tamasy-Bano
535
Control Engineering Contribution to the Lumber Drying Process Modeling and Control
M. Cicel und D. Laco
546
Section IX
ENERGY ASPECT IN DRYING
Energy Considerations in Dryer Design
R.E. Bahu
553
Utilization of Flue Gases in Raw Sugar Factories for Bagasse Drying
D.R. McGaw and A.C. Pilgrim
558
Analysis of Paper Dryers Heat Consumption
A. Strawinski
567
A New Quality of Computer Simulation Models Describing Technological Drying Processes
U. Heye, R Löser, M. Melzer and U. Schirmer
579
Section X
MISCELLANEOUS TOPICS
Convective Dryer Design According to Material Properties
B. Cermak
591
The Effect of Ammonia on the Drying Rate and on the Nutritive Value of Alfalfa
J. Stencl and P. Dolezal
603
Unusual Drying Rate Curves
E.-U. Schlünder
615
Preliminary Study on Silkworm Cocoons Drying
S.-R Chen, J.-Y. Chen and A.S. Mujumdar
620

CONTRIBUTORS INDEX
629

SUBJECT INDEX
631