scholarly journals Modeling moisture diffusivity, activation energy and specific energy consumption of squash seeds in a semi fluidized and fluidized bed drying

2011 ◽  
Vol 50 (4) ◽  
pp. 667-677 ◽  
Author(s):  
Reza Amiri Chayjan ◽  
Kamran Salari ◽  
Qasem Abedi ◽  
Ali Akbar Sabziparvar
Keyword(s):  
Activation Energy ◽  
Energy Consumption ◽  
Fluidized Bed ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Moisture Diffusivity ◽  
Fluidized Bed Drying

scholarly journals Fluidized bed drying of petals of Echium amoenum Fisch. and C.A. Mey: energy analysis and carbon footprint

2018 ◽  
Author(s):  
Fatemeh Nadi ◽  
J.C. Atuonwu
Keyword(s):  
Energy Consumption ◽  
Greenhouse Gas ◽  
Fluidized Bed ◽  
Carbon Footprint ◽  
Specific Energy ◽  
Greenhouse Gas Emission ◽  
Specific Energy Consumption ◽  
Energy Performance ◽  
Echium Amoenum ◽  
Fluidized Bed Drying

The energy performance and carbon footprint associated with the fluidized bed drying of petals of Echium amoenum Fisch. and C.A. Mey are experimentally evaluated at three temperatures (40,50,60°C) and air velocities (0.50,0.75,1.00m/s). The maximum and minimum specific energy consumption are observed to occur at 40°C and 1ms-1 (79.18MJ/kg) and 60°C and 0.5m/s (22.60MJ/kg), respectively. The greenhouse gas emission is in the range, 0.10-8.40kgCO2eq, varying with drying conditions in the same manner as energy consumption, with natural gas-fired systems performing better than oil-fired systems. High-temperature, low-air velocity drying is thus, favourable for energy-efficient and sustainable fluidized bed drying of the petals.Keywords: fluidized bed dryer; greenhouse gas; specific energy consumption; Iran.  

Drying Strategies for Fluidized-Bed Drying of Paddy

2009 ◽  
Vol 5 (2) ◽  
Author(s):  
Supawan Tirawanichakul ◽  
Somkiat Prachayawarakorn ◽  
Warunee Varanyanond ◽  
Somchart Soponronnarit
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Thin Layer ◽  
Fluidized Bed ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Initial Moisture Content ◽  
Linear Regression Method ◽  
Moisture Contents ◽  
Fluidized Bed Drying

The main objective of this work was to determine an effective moisture diffusivity of long grain rice during fluidized-bed drying (FBD) with inlet drying temperatures ranging of 40-150°C by 10°C/step and to investigate the specific energy consumption of the FBD process. Three initial moisture contents of the local indica paddy were set at 25.0, 28.8 and 32.5% dry-basis. The experimental results of thin-layer fluidized-bed drying for the long grain rice variety were determined and statistically analyzed by non-linear regression method. The results showed that an effective diffusion coefficient was highly dependent on the drying temperature, compared to initial moisture content. Consequently, the mathematical simulation of FBD, using the developed thin-layer drying mentioned above, was evaluated and used for predicting the paddy drying system. The simulated value of energy consumption in each of the drying conditions was comparatively simulated. The simulated results showed that a FBD with low temperatures and low initial moisture content gave higher specific energy consumption than drying with high temperatures and high initial moisture contents. The total specific energy consumption increased with a decreased fraction of re-circulated outlet drying air. According to the simulation results and our previous work, the conclusion is that the long grain paddy drying with FBD technique under a high initial moisture content and drying air temperature over 100°C is the good drying condition for recommendation.

scholarly journals Evaluasi Kinerja dan Konsumsi Energi Pengering Pati Sagu Model Agitated Fluidized Bed Bertenaga Biomassa

2020 ◽  
Vol 2 (2) ◽  
pp. 53
Author(s):  
Abadi Jading ◽  
Paulus Payung ◽  
Eduard Fransisco Tethool
Keyword(s):  
Energy Consumption ◽  
Fluidized Bed ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Coefficient Of Performance ◽  
Utilization Factor ◽  
Heat Utilization ◽  
Heat Efficiency ◽  
Effective Heat

Pengering Agitated Fluidized Bed (AFB) telah dirancang untuk pengeringan pati sagu. Untuk mengetahui kinerja pengering AFB tersebut, maka dilakukan analisis nilai indeks kinerja Heat Utilization Factor (HUF), Coefficient Of Performance (COP), Effective Heat Efficiency (EHE), dan Specific Energy Consumption (SEC) berdasarkan perlakuan suhu (50oC, 60oC, dan 70oC) dan massa input bahan (3 kg, 6 kg, dan 12 kg). Nilai indeks kinerja HUF, COP, EHE dan SEC ditentukan dengan analisis matematis. Hasil penelitian ini menunjukkan bahwa indeks kinerja pengering AFB terbaik dari semua perlakuan suhu dan massa input bahan adalah pada suhu 60oC dengan massa input bahan 12 kg, dimana nilai HUF lebih besar dari nilai COP. Nilai HUF, COP, dan EHE masing-masing adalah 53,1%, 46,9%, 70,3% dan nilai SEC 559,9 kJ/s. Nilai rata-rata HUF, COP, EHE, dan SEC dari semua perlakuan pada pengering AFB adalah 37,23%, 62,7%, 58,5%, dan 337,6 kJ/s. Kinerja pengering AFB cukup rendah, dimana nilai HUF rata-rata lebih kecil dari nilai COP rata-rata, dan energi yang digunakan cukup tinggi. Namun demikian, pengering AFB mampu mengeringkan pati sagu dengan kadar air akhir 14,4% basis basah mendekati standar mutu pati sagu kering 13%, pada suhu 70oC dengan massa bahan sebanyak 3 kg selama 5 menit (300 detik).

Optimization of Pistachio Nut Drying in a Fluidized Bed Dryer with Microwave Pretreatment Applying Response Surface Methodology

2017 ◽  
Vol 12 (3) ◽  
Author(s):  
Reza Amiri Chayjan ◽  
Mohammad Kaveh ◽  
Nesa Dibagar ◽  
Moein Zarrin Nejad
Keyword(s):  
Response Surface Methodology ◽  
Energy Consumption ◽  
Fluidized Bed ◽  
Air Temperature ◽  
Specific Energy ◽  
Color Change ◽  
Specific Energy Consumption ◽  
Air Velocity ◽  
Fluidized Bed Dryer ◽  
Total Color Change

Abstract Thin-layer drying kinetics of pistachio nuts were examined experimentally as a function of drying conditions in a fluidized bed dryer with microwave pretreatment. Four drying specifications of diffusivity, shrinkage, specific energy consumption and total color change were calculated and the effects of parameters were studied. Numerous experimentations were conducted at three levels of air temperature (40, 55, 70 °C), air velocity (1.2, 2.93, 4.01 m/s), and microwave power (270, 450, 630 W). The variation ranges of diffusivity, shrinkage, energy consumption and color change were recorded from 5.01×10–10 to 5.07×10–9 m2/s, from 26.95 % to 13.13 %, from 1.04 to 9.23 kWh and from 10.44 to 17.17, respectively. According to response surface methodology, optimum condition of drying process occurred at microwave power of 630, air temperature of 70 ˚C, and air velocity of 1.2 m/s. In this optimum point, the values of diffusivity, shrinkage, specific energy consumption and total color change were 4.865×10–9, 14.22 %, 2.164 kWh and 12.312, respectively.

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