Investigation of Hydrodynamics, Kinetics, Energetic and Exergetic Aspects of Fluidized Bed Drying of Rough Rice
-
Majid Khanali
and
Shahin Rafiee
Abstract
The hydrodynamics, kinetics as well as energy and exergy analyses of fluidized bed drying of rough rice under various experimental conditions were investigated. Drying experiments were conducted at drying air temperatures of 55, 60, and 70°C, superficial fluidization velocities of 2.3, 2.5, and 2.8 m/s, solid holdups of 0.66 and 1.32 kg, and rough rice initial moisture content of 0.25 d.b. Various popular drying models were used to fit the drying data. It was found that the fluidized bed hydrodynamics of the rough rice was uniform and stable. The drying rate was found to increase with increase in drying air temperature and superficial fluidization velocity, while decreased with increase in solid holdup. Statistical analyses showed that the Midilli et al. model was the best model in describing fluidized bed drying characteristics of the rough rice. The results showed that the values of energy efficiency were higher than the corresponding values of exergy efficiency during the entire drying process. Furthermore, at initial stage of drying, the energy and exergy efficiencies were higher than those at the end of drying. It was also found that both the energy and the exergy efficiencies increased with increasing drying air temperature and solid holdup, whereas decreased with the increase in superficial fluidization velocity.
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©2014 by Walter de Gruyter Berlin / Boston
Articles in the same Issue
- Frontmatter
- Mass Transfer Coefficients and Correlation of Supercritical Carbon Dioxide Extraction of Sarawak Black Pepper
- Higher Order Predictive Functional Control Versus Dynamical Matrix Control for a Milk Pasteurisation Process: Transfer Function Versus Finite Step Response Internal Models
- Fluidized Bed Drying of Sprouted Wheat(Triticum aestivum)
- Investigation of Hydrodynamics, Kinetics, Energetic and Exergetic Aspects of Fluidized Bed Drying of Rough Rice
- Flux Behavior and Quality of Effluent from a Poultry Processing Plant Treated by Membrane Bioreactor
- Experimental Analysis and Numerical Modeling of Microwave Reheating of Cylindrically Shaped Instant Rice
- Microwave, Air and Combined Microwave-Air Drying of Grape Leaves (Vitis vinifera L.) and the Determination of Some Quality Parameters
- Modelling the Influence of Time and Temperature on Respiration Rate of Fresh Fig and Diced Papaya
- Identification of Peanut Pods with Three or More Kernels by Machine Vision and Neural Network
- Effect of Drying Pre-treatments on the Yield and Bioactive Content of Oil Extracted from Gac Aril
- Effect of Pulsed Electric Field on Microstructure of Some Amino Acid Group of Soy Protein Isolates
- A Novel Modified Starch/Carboxymethyl Cellulose/Montmorillonite Bionanocomposite Film: Structural and Physical Properties
- Effects of Spray Drying Conditions on the Stability and Antioxidant Properties of Spray-Dried Soluble Maté
- Effect of Frying Time and Temperature on the Functional Properties of Carrot Pomace, Pulse Powder and Rice Flour–Based Extrudates
- Effects of Moisture Content and Impact Energy on the Cracking Characteristics of Walnuts
- Spray Drying of Karkade (Hibiscus sabdariffa L.) Calyces and Evaluation of the Product
- Optimization of Closed-Cycle Fluidized Bed Drying of Sesame Seeds Using Response Surface Methodology and Genetic Algorithms
- Assessment of Heat Transfer and Mass Change During Fruits and Vegetables Impingement Pre-Cooling
- High Temperature Short Time Air Puffed Ready-To-Eat (RTE) Tapioca–Peanut Snack: Process Parameters Optimization
Articles in the same Issue
- Frontmatter
- Mass Transfer Coefficients and Correlation of Supercritical Carbon Dioxide Extraction of Sarawak Black Pepper
- Higher Order Predictive Functional Control Versus Dynamical Matrix Control for a Milk Pasteurisation Process: Transfer Function Versus Finite Step Response Internal Models
- Fluidized Bed Drying of Sprouted Wheat(Triticum aestivum)
- Investigation of Hydrodynamics, Kinetics, Energetic and Exergetic Aspects of Fluidized Bed Drying of Rough Rice
- Flux Behavior and Quality of Effluent from a Poultry Processing Plant Treated by Membrane Bioreactor
- Experimental Analysis and Numerical Modeling of Microwave Reheating of Cylindrically Shaped Instant Rice
- Microwave, Air and Combined Microwave-Air Drying of Grape Leaves (Vitis vinifera L.) and the Determination of Some Quality Parameters
- Modelling the Influence of Time and Temperature on Respiration Rate of Fresh Fig and Diced Papaya
- Identification of Peanut Pods with Three or More Kernels by Machine Vision and Neural Network
- Effect of Drying Pre-treatments on the Yield and Bioactive Content of Oil Extracted from Gac Aril
- Effect of Pulsed Electric Field on Microstructure of Some Amino Acid Group of Soy Protein Isolates
- A Novel Modified Starch/Carboxymethyl Cellulose/Montmorillonite Bionanocomposite Film: Structural and Physical Properties
- Effects of Spray Drying Conditions on the Stability and Antioxidant Properties of Spray-Dried Soluble Maté
- Effect of Frying Time and Temperature on the Functional Properties of Carrot Pomace, Pulse Powder and Rice Flour–Based Extrudates
- Effects of Moisture Content and Impact Energy on the Cracking Characteristics of Walnuts
- Spray Drying of Karkade (Hibiscus sabdariffa L.) Calyces and Evaluation of the Product
- Optimization of Closed-Cycle Fluidized Bed Drying of Sesame Seeds Using Response Surface Methodology and Genetic Algorithms
- Assessment of Heat Transfer and Mass Change During Fruits and Vegetables Impingement Pre-Cooling
- High Temperature Short Time Air Puffed Ready-To-Eat (RTE) Tapioca–Peanut Snack: Process Parameters Optimization
