Drying and Storage of Cereal Grains

Bala, B. K.

doi:10.1002/9781119124207

Cited by 70 publications

(74 citation statements)

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“…In order to analyze the freeze-drying kinetics, the moisture content is forwards expressed as moisture ratio (MR), calculated by equation (1) or by the simplified form (2) applied when the equilibrium moisture contents M e is enough low [15]: ) where: k is the drying constant (min -1 ), M , M 0 and M e -moisture content at each measured time, at the beginning and at the final/equilibrium (kg moisture/kg dried matter), t -the drying time (min).…”

Section: Figure 1 Drying Curvesmentioning

confidence: 99%

Freeze-Drying Kinetics Approach of Soluble Coffee. Mass Transfer Parameters Estimation

Ghirişan¹,

Drăgan²,

Miclăuş³

2017

Studia UBB Chemia

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ABSTRACT. The present paper presents the freeze-drying kinetics of soluble coffee in order to determine the mass transfer parameters. Several semi-theoretical and empirical models were used to find the best fit to the experimental data. The applied models were compared using the coefficient of determination (R 2 ), the mean relative percent error (P), the root mean square error (RMSE) and the reduced chi-square ( 2 ). The Midilli model was found to fit better to the experimental freeze-drying data comparative to other models. The Fick's second law was employed to determine the effective diffusion coefficient (Deff).

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Section: Figure 1 Drying Curvesmentioning

confidence: 99%

Freeze-Drying Kinetics Approach of Soluble Coffee. Mass Transfer Parameters Estimation

Ghirişan¹,

Drăgan²,

Miclăuş³

2017

Studia UBB Chemia

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“…This procedure ensures that the product can be preserved for certain period of time without changes as well as the possibility of its use yeararound (McLean, 1980;Krička and Pliestić, 1994;Krička et al, 2001;Krička et al, 2003;Matin et al, 2007). Bala (1997) defined the activation energy or activation energy (E a ) for a reaction of seed water release as energy that must be supplied to trigger water molecules to interact. In order to interact, water molecules must collide, but only those molecules can interact which have energy higher than activation energy.…”

Section: Introductionmentioning

confidence: 99%

Effects of different air drying temperature on sunflower seeds oil and ash content

Matin¹,

Krička²,

Jurišić³

et al. 2017

J Process Energy Agric

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“…Laju pengeringan dapat dinyatakan sebagai berikut (Bala, 1997): Gambar 2. Skema diagram neraca energi pada penyimpan panas Berdasarkan diagram tersebut neraca energi air di dalam penyimpan panas dan penukar panas sebagai berikut:…”

Section: Model Penurunan Kadar Air Pada Produk Untuk Tiap Rakunclassified

Pemodelan Matematik Kinerja Pengering Surya Efek Rumah Kaca (ERK)-Hibrid Menggunakan Rak Berputar secara Vertikal (Mathematical Modeling Performance of Greenhouse Effect (GHE)-Hybrid Solar Dryer with a Vertical Rotating Rack)

et al. 2016

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ABSTRAKMakalah ini menyajikan uji unjuk kerja dan pemodelan matematik pengering energi surya (ERK)-Hibrid menggunakan rak berputar secara vertikal. Pengering terdiri dari bangunan rumah kaca berukuran (1100 × 860 × 1300) mm dengan delapan buah rak dan sistim pemanas tambahan yang terdiri dari kolektor plat datar (1,04 m 2 ), tangki penyimpan air panas (197 liter) dan penukar panas. Untuk mengetahuikinerja pengering energi surya, dilakukan lima kali percobaan variasi kecepatan putar rak (1, 4, 7, 10 ) rpm dan tanpa pemutaran rak. Bahan yang dipergunakan pada pengujian adalah kapulaga lokal (Amomum cardamomum Wild). Masing-masing percobaan seberat 9 sampai dengan 10 kg. Rata-rata suhu air tangki penyimpan panas bervariasi dari 50,0 sampai dengan 55,0 °C suhu ruang pengering antara 38,9 sampai dengan 45,9 °C, sedangkan kelembaban relatif (RH) ruang pengering berkisar antara 32,1 sampai dengan 47,4 %. Perlakuan pemutaran rak berpengaruh terhadap keseragaman suhu bahan maupun kadar air pada masing rak pengering. Pada perlakuan pemutaran 1 rpm (percobaan II), didapatkan kondisi terbaik (suhu bahan maupun kadar air yang paling seragam). Dengan kecepatan putar rak yang semakin meningkat menyebabkan nilai ragam suhu bahan maupun kadar air semakin meningkat. Untuk melakukan simulasi unjuk kerja dilakukan pemodelan matematik berdasarkan pindah panas dan massa serta pendekatan pengeringan lapisan tipis. Persamaan diselesaikan secara numerik menggunakan finite difference Euler dengan bantuan bahasa pemrograman Visual Basic Aplication (VBA) Excell. Validasi dilakukan dengan membandingkan antara perhitungan hasil pemodelan (data prediksi) dengan data hasil pengukuran (data observasi). Kriteria kevalidan ditentukan dengan melihat nilai koefisien determinasi (R 2 ), nilai RMSD maupun nilai MAPD. Pemodelan matematik yang telah dibangun dapat menggambarkan dengan tepat perubahan suhu air tangki penyimpan panas, suhu ruang pengering, suhu bahan maupun penurunan kadar air.Kata kunci: Pengering surya efek rumah kaca; uji kinerja; pemodelan matematik Rak berputar vertikal ABSTRACT This paper presents a performance test and mathematical modeling of greenhouse effect (GHE)-Hybrid solar dryer with vertical rotating rack. The dryer consists of a greenhouse dryer (1100 × 860 × 1300) mm with eight rack and additional heating system consists of a flat plate collector (1,04 m 2 ), a hot water storage tank (197 liters) and a heat exchanger. To investigate the performance of solar greenhouse dryer, five experimental variation speed of rack were conducted (1, 4, 7, 10 rpm) and without rotation. Materials used in the experiment are local cardamom (Amomum cardamomum Wild). Weight of each experiment about 9 to 10 kg. The average temperature of the hot water storage tank varies from 50.0 to 55.0 °C, drying air temperature between 38.9 to 45.9 °C, while the relative humidity (RH) of drying chamber ranged

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Drying and Storage of Cereal Grains

Cited by 70 publications

References 0 publications

Freeze-Drying Kinetics Approach of Soluble Coffee. Mass Transfer Parameters Estimation

Freeze-Drying Kinetics Approach of Soluble Coffee. Mass Transfer Parameters Estimation

Effects of different air drying temperature on sunflower seeds oil and ash content

Pemodelan Matematik Kinerja Pengering Surya Efek Rumah Kaca (ERK)-Hibrid Menggunakan Rak Berputar secara Vertikal (Mathematical Modeling Performance of Greenhouse Effect (GHE)-Hybrid Solar Dryer with a Vertical Rotating Rack)

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