Microwave power control strategies on the drying process II. Phase-controlled and cycle-controlled microwave/air drying

The current study was conducted for evaluating the effects of two different strategies viz., phase control and cycle control, on the microwave/air drying process. The evaluation was carried out through combined microwave and convective drying of potato samples. Results showed that different power control methods had different impacts on drying kinetics and product quality. In both drying modes, the drying time increased with the decrease of microwave power density and the increase of air velocity. The drying rates of cycle-controlled drying are significantly higher than those of phase-controlled drying. In terms of rehydration capacity the phase-controlled drying mode produced better results. The product colour and sensory attributes were independent of the power control methods.

[1]  Majeda Khraisheh,et al.  Microwave and air drying I. Fundamental considerations and assumptions for the simplified thermal calculations of volumetric power absorption , 1997 .

[2]  Majeda Khraisheh,et al.  A multiple regression approach to the combined microwave and air drying process , 2000 .

[3]  G.S.V. Raghavan,et al.  ANALYSIS OF HEAT AND MASS TRANSFER DURING COMBINED MICROWAVE CONVECTIVE SPOUTED-BED DRYING , 2001 .

[4]  Suresh Prasad,et al.  Drying of garlic (Allium sativum) cloves by microwave-hot air combination , 2001 .

[5]  Medeni Maskan,et al.  Kinetics of colour change of kiwifruits during hot air and microwave drying , 2001 .

[6]  J. A. Pearce,et al.  Foundations And Industrial Applications Of Microwaves And Radio Frequency Fields. Physical And Chemical Processes. , 1998, Proceedings of the 6th International Conference on Optimization of Electrical and Electronic Equipments.

[7]  Christine H. Scaman,et al.  Characterization of vacuum microwave, air and freeze dried carrot slices , 1998 .

[8]  G.S.V. Raghavan,et al.  COMBINED OSMOTIC AND MICROWAVE DRYING OF STRAWBERRIES , 1999 .

[9]  Marvin J. Fisher.  Power Electronics , 1991 .

[10]  Baden Fuller.  Microwaves: An introduction to microwave theory and techniques , 1979 .

[11]  T. Koryu Ishii.  Practical microwave electron devices , 1990 .

[12]  T. Tulasidas,et al.  Combined Convective and Microwave Drying of Grapes , 1995 .

[13]  Rami Jumah,et al.  Control of Industrial Dryers , 2006 .

[14]  Wojciech Puacz,et al.  Application of Microwave Energy to Cleavage of Sulfur Bonds in the S8Ring in the Simplest Amide Solvents , 1996 .

[15]  Joseph Miltz,et al.  Dehydration of carrots by a combination of freeze drying, microwave heating and air or vacuum drying , 1998 .

[16]  L. P. Kok,et al.  Programming the microwave oven , 1994, Journal of Neuroscience Methods.

[17]  C Davis,et al.  Microwave fixation of rabies specimens for fluorescent antibody testing. , 1997, Journal of virological methods.

[18]  Gustavo V. Barbosa-Cánovas,et al.  Drying of biotechnological products: current status and new developments. , 2003 .

[19]  G.S.V. Raghavan,et al.  SHRINKAGE CHARACTERISTICS OF STRAWBERRIES OSMOTICALLY DEHYDRATED IN COMBINATION WITH MICROWAVE DRYING , 2001 .

[20]  Andrzej M. Trzynadlowski,et al.  Introduction to modern power electronics , 1998 .

[21]  Helmar Schubert,et al.  Microwave application in vacuum drying of fruits , 1996 .

[22]  R. G. Carter,et al.  Electromagnetic waves: Microwave components and devices , 1990 .

[23]  R. G. Mcguire,et al.  Reporting of Objective Color Measurements , 1992 .

[24]  Pedro Fito,et al.  DRYING KINETICS OF APPLE CYLINDERS UNDER COMBINED HOT AIR–MICROWAVE DEHYDRATION , 2004 .

[25]  李幼升,et al.  Ph , 1989 .

[26]  Arun S. Mujumdar,et al.  Microwave Drying of Corn III. Constant Power, Intermittent Operation , 1992 .

[27]  Lilia Ahrné,et al.  Effects of Combined Osmotic and Microwave Dehydration of Apple on Texture, Microstructure and Rehydration Characteristics , 2001 .

[28]  Robert A. Peterson,et al.  Microwave processing and engineering , 1986 .

[29]  John R. Bows,et al.  Microwave phase control heating , 1999 .

[30]  N. Menshutina,et al.  MICROWAVE DRYING OF MULTICOMPONENT SOLS , 1999 .

[31]  G.S.V. Raghavan,et al.  Drying of Corn Using Variable Microwave Power with a Surface Wave Applicator , 1991 .

[32]  Robert Schiffmann,et al.  Microwave and Dielectric Drying , 2020, Handbook of Industrial Drying.

[33]  E. Eckert,et al.  Analysis of heat and mass transfer , 1971 .

[34]  Roger Meredith,et al.  Engineers' Handbook of Industrial Microwave Heating , 1998 .

[35]  Patrick Glouannec,et al.  Experimental survey on the combination of radiating infrared and microwave sources for the drying of porous material , 2002 .

[36]  B. L. Jones.  Power Electronics and Motor Control , 1988 .

[37]  David Finney,et al.  The Power Thyristor and Its Applications , 1980 .

[38]  H. S. Ramaswamy,et al.  Feed‐back Temperature Control System for Microwave Ovens Using a Shielded Thermocouple , 1991 .

[39]  Richard A. Pearman.  Power Electronics: Solid State Motor Control , 1980 .

[40]  Shigeru Kusunoki,et al.  A microwave heating , 1976 .

[41]  Liuming Zhou,et al.  EFFECT OF TEMPERATURE GRADIENT ON MOISTURE MIGRATION DURING MICROWAVE HEATING , 1994 .

[42]  Raymond Southern Ramshaw.  Power Electronics: Thyristor Controlled Power For Electric Motors , 1973 .

[43]  G. D. Saravacos,et al.  Microwave/vacuum drying of model fruit gels , 1999 .

[44]  A. C. Metaxas,et al.  Industrial Microwave Heating , 1988 .

[45]  A. S. Mujumdar,et al.  Microwave Drying of Grapes in a Single Mode Cavity at 2450 Mhz - 11: Quality and Energy Aspects , 1995 .

[46]  Ana Rita A. Nogueira,et al.  Focused microwave-assisted acid digestion of oils: an evaluation of the residual carbon content , 2001 .

[47]  Feng Chen,et al.  Drying of American ginseng (Panax quinquefolium roots by microwave-hot air combination , 1998 .

[48]  A. Cullen,et al.  Introduction to Microwaves , 1970, Nature.

[49]  S. K. Datta.  Power Electronics and Controls , 1984 .

[50]  F. F. Mazda.  Power Electronics Handbook: Components, Circuits and Applications , 1993 .

[51]  A. Mujumdar,et al.  Advanced drying technologies , 2001 .

[52]  Juming Tang,et al.  TEMPERATURE AND MOISTURE CHANGES DURING MICROWAVE DRYING OF SLICED FOOD , 1999 .

[53]  Xiguo Jia,et al.  Mathematical and experimental modelling of heat pump assisted microwave drying , 1993 .

[54]  B. W. Williams,et al.  Power Electronics: Devices, Drivers, Applications and Passive Components , 1992 .

[55]  H. S. Ramaswamy,et al.  Microwave-assisted convective air drying of thin layer carrots , 1995 .

[56]  Muhammad H. Rashid,et al.  Power Electronics: Circuits, Devices and Applications , 1993 .

[57]  Sundaram Gunasekaran,et al.  Microwave-vacuum drying of cranberries : Part I. Energy use and efficiency , 1996 .

[58]  Arun S. Mujumdar,et al.  SOME FUNDAMENTAL ATTRIBUTES OF CORN AND POTATO DRYING IN MICROWAVE FIELDS , 1997 .

[59]  Virgil L. Anderson,et al.  Design of experiments : a no-name approach , 1993 .

[60]  Philip E. Nelson,et al.  Finite element analysis of temperature distribution in microwaved cylindrical potato tissue , 1993 .

[61]  A. Mujumdar.  Handbook of Industrial Drying , 2020 .

[62]  C. W. Hall.  HANDBOOK OF INDUSTRIAL DRYING , 1988 .