Thin layer drying of cassava starch using continuous vibrated fluidized bed dryer

2015 ◽  
Author(s):  
Suherman ◽  
Rona Trisnaningtyas
Keyword(s):  
Thin Layer ◽  
Fluidized Bed ◽  
Cassava Starch ◽  
Fluidized Bed Dryer ◽  
Thin Layer Drying ◽  
Vibrated Fluidized Bed

scholarly journals ANALISA ENERGI DAN EKSERGI PADA PENGERINGAN TEPUNG TAPIOKA MENGGUNAKAN PENGERING KONTINYU UNGGUN FLUIDISASI GETAR

REAKTOR ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 24 ◽  
Author(s):  
Suherman Suherman ◽  
Rona Trisnaningtyas
Keyword(s):  
Energy Efficiency ◽  
Fluidized Bed ◽  
Exergy Analysis ◽  
Cassava Starch ◽  
Energy Utilization ◽  
Exergetic Efficiency ◽  
Energy And Exergy ◽  
Vibrated Fluidized Bed ◽  
Energy And Exergy Analysis ◽  
Utilization Ratio

Energy and exergy analysis of cassava starch drying in continuous vibrated fluidized bed dryer were carried out to assess the performance of the system in terms of energy utilization ratio, energy efficiency, exergy inflow and outflow, exergy loss, and exergetic efficiency. The results showed cassava starch has starch content 87%, degree of whiteness 95%, negative fiber content, sperichal granula with average diameter12.32 μm, orthorhombic crystal structure and crystal size 47.467 nm . Energy utilization and energy utilization ratio increased from 0.08 to 0.20 J/s and 0.35 to 0.4 as the drying temperature  increased from 50 to 70 oC. Energy efficiency increased from 13.80 % to 23.31 %, while exergy inflow, outflow, and losses increased from 4.701 to 14.678, 2.277 to 6.344, and 2.424 to 8.334 J/s respectively in the above temperature range. Exergetic efficiency decreased with increase in drying air temperature, while exergetic improvement potential increased with increased drying air temperature. Keywords: Cassava starch, continuous drying, energy and exergy analysis, vibrated fluidized bed Abstrak Analisis energi dan eksergi pengeringan pati tapioka menggunakan pengering kontinu unggun fluidisasi getar, telah dilakukan untuk menilai kinerja sistem dalam bentuk utilisasi energi, efisiensi energi, eksergi masuk dan keluar, eksergi hilang dan efisiensi eksergi. Hasil analisis pati memiliki kandungan starch 87%, tingkat keputihan 95%, kandungan serat negatif, bentuk partikel granular spherical dengan diameter 12,32 μm, struktur kristal orthorhombic dan ukuran kristal sebesar 47,467 nm. Peningkatan suhu pengering dari 50 menjadi 70 0C akan meningkatkan utilisasi energi dan rasio utilisasi energi dari 0,08 menjadi 0,20 J/s dan 0,35 menjadi 0,4. Efisiensi energi meningkat dari 13,80% hingga 23,31%, sedangkan eksergi masuk dan keluar, eksergi hilang meningkat dari 4,701 menjadi 14,678, 2,277 menjadi 6,344, dan 2,424 menjadi 8,334 J/s. Efisiensi eksergi menurun dengan naiknya suhu sedangkan potensi pengembangan eksergi meningkat dengan naiknya suhu. Kata kunci:. Analisis energi dan eksergi, pati tapioka, pengeringan kontinu, unggun fluidisasi getar

scholarly journals Investigating shrinkage and moisture diffusivity of melon seed in a microwave assisted thin layer fluidized bed dryer

2016 ◽  
Vol 11 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Iman Golpour ◽  
Moein Zarrin Nejad ◽  
Reza Amiri Chayjan ◽  
Ali Mohammad Nikbakht ◽  
Raquel P. F. Guiné ◽  
...  
Keyword(s):  
Thin Layer ◽  
Fluidized Bed ◽  
Moisture Diffusivity ◽  
Melon Seed ◽  
Fluidized Bed Dryer ◽  
Microwave Assisted

Evaluation of thin-layer models for describing drying kinetics of poplar wood particles in a fluidized bed dryer

2016 ◽  
Vol 35 (6) ◽  
pp. 723-730 ◽  
Author(s):  
Mohammad Arabi ◽  
Mohammad Mehdi Faezipour ◽  
Mohammad Layeghi ◽  
Majid Khanali ◽  
Hamid Zareahosseinabadi
Keyword(s):  
Thin Layer ◽  
Fluidized Bed ◽  
Drying Kinetics ◽  
Poplar Wood ◽  
Fluidized Bed Dryer ◽  
Wood Particles ◽  
Kinetics Of

scholarly journals Simulation of Three-dimensional Vibrated Fluidized Bed Dryer Using Distinct Element Method

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
S. Wongsiriwan ◽  
Thongchai Rohitatisha Srinophakun ◽  
Pakon Laopreecha
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Particle Motion ◽  
Distinct Element ◽  
Distinct Element Method ◽  
Drying Rate ◽  
Gas Velocity ◽  
Fluidized Bed Dryer ◽  
Vibrated Fluidized Bed ◽  
Superficial Gas Velocity

The particle motion, temperature behavior, and drying rate of particle inside a vibrated fluidized bed dryer were numerically investigated in this work. In the simulation, the Distinct Element Method (DEM) based on the Newton’s second law of motion was used to solve the particle motion. The physical aspects of fluid motion and heat transfer were obtained by applying Computational Fluid Dynamics (CFD) technique. For the drying of particle, only the constant rate period was considered in order to save the computational time. Programming was developed in Standard-C language and using MATLAB to visualize the results. In the simulation, 2,000 particles with stiffness 800 N m-1 were simulated in a rectangular bed. The developed model was validated with an experimental result of Gupta et al. [1]. The program was then used to study the effect of superficial gas velocity (U0), frequency of vibration (f) and amplitude of vibration (a) in fluidized bed dryer. At low velocities and no vibration of bed,  articles in the bed were not fluidized but smoothly circulated. Thus, the heat transfer occurred only near the orifice. When superficial gas velocity increased, the fluidization of the particles was observed. The fluidization and drying rate improved with increased in superficial velocity for both vibrated fluidized bed and stationary bed. With introducing of vibration, the fluidization behavior of the particle was improved. The particles in the bed were well mixed and also increased the drying rate. From the simulation results, increasing of frequency and amplitude could not significantly improve rate of drying.

scholarly journals  Modeling some drying characteristics of garlic sheets under semi fluidized and fluidized bed conditions

2012 ◽  
Vol 58 (No. 2) ◽  
pp. 73-82 ◽  
Author(s):  
R. Amiri Chayjan ◽  
K. Salari ◽  
B. Shadidi
Keyword(s):  
Thin Layer ◽  
Fluidized Bed ◽  
Air Temperature ◽  
Specific Energy Consumption ◽  
Initial Moisture Content ◽  
Convective Drying ◽  
Air Temperatures ◽  
Thin Layer Drying ◽  
Drying Behavior ◽  
Drying Properties

Thin layer drying properties of high moisture garlic sheets under semi fluidized and fluidized bed conditions with high initial moisture content (about 154.26% d.b.) were studied. Air temperatures of 50, 60, 70 and 80&deg;C were applied to garlic samples. Among the applied models, Page model was the best to predict the thin layer drying behavior of garlic sheets. Using this model, correlation coefficient (R<sup>2</sup>) was high for all drying cases. The computed values of D<sub>eff</sub> were between 3.38 &times; 10<sup>&ndash;10</sup> and 2.54 &times; 10<sup>&ndash;9</sup> m<sup>2</sup>/s during the falling rate drying. Values of D<sub>eff</sub> for garlic sheets were also increased with increasing in input air temperature. Activation energy values were varied between 51.32 and 60.58 kJ/mol for 50 to 80&deg;C, respectively. The specific energy consumption (SEC) for garlic specimens was placed in the range of 0.316 &times; 10<sup>6</sup> and 0.979 &times; 10<sup>6</sup> kJ/kg from 50 to 80&deg;C, respectively. An increase in air temperature caused decrease in SEC value. Application of semi fluidized bed convective drying with temperature between 50 and 60&deg;C was suitable to produce dried garlic. &nbsp; &nbsp;

scholarly journals Erratum to: Investigating shrinkage and moisture diffusivity of melon seed in a microwave assisted thin layer fluidized bed dryer

2017 ◽  
Vol 11 (2) ◽  
pp. 937-937
Author(s):  
Iman Golpour ◽  
Moein Zarrin Nejad ◽  
Reza Amiri Chayjan ◽  
Ali Mohammad Nikbakht ◽  
Raquel P. F. Guiné ◽  
...  
Keyword(s):  
Thin Layer ◽  
Fluidized Bed ◽  
Moisture Diffusivity ◽  
Melon Seed ◽  
Fluidized Bed Dryer ◽  
Microwave Assisted
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