A numerical and experimental investigation of the modeling of microwave heating for liquid layers using a rectangular wave guide (effects of natural convection and dielectric properties)

Ratanadecho, Phadungsak; Aoki, Kazuo; Akahori, Masatoshi

doi:10.1016/s0307-904x(01)00046-4

Cited by 121 publications

(62 citation statements)

References 10 publications

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“…Finally, Romano et al [10] correctly applied Lambert's law considering the geometry of the sample, thus finding the same field of application for both the shapes and a power concentration along the central axis for a cylindrical domain, according with the experimental observations [9]. As regards fluids, there are fewer studies and the most are about batch processes [11] [12]. The references in continuous processes instead are represented by Salvi et al [13] and J. Zhu et al [15] whose mathematical model considers the generation term according to Maxwell's equations.…”

Section: Introductionmentioning

confidence: 95%

Microwave Heating of Liquid Foods

Romano¹,

Apicella²

2015

ENG

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Section: Introductionmentioning

confidence: 95%

Microwave Heating of Liquid Foods

Romano¹,

Apicella²

2015

ENG

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“…The volumetric internal heat generation (Q) in Eq. (3) depends on both the electric and magnetic fields in the dielectric medium [20]. …”

Section: Dielectric Propertiesmentioning

confidence: 99%

Optimizing the Properties of Vulcanized Compounds for Foodstuff Conveyor Belts in Industrial Microwave Per-Heating

Limhengha¹

2018

GEOMATE

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This research finds a natural rubber-based material with good dielectric properties and low cost for a foodstuff conveyor belt (FCB) that can be heated with microwaves. For this purpose, epoxidized natural rubber-50 (ENR50) and standard Thai rubber 5L (STR5L) were mixed with a filler mixture of silica and magnesium carbonate. The FCB compound with filler (FCBcF) yielding the best vulcanization time, and the best mechanical, dielectric and dynamic properties, was selected for further study. The optimal FCBcF, ENR50:SiO 2 :MgCO 3 (100:40:40) with microwave pre-heating at 2.45 GHz and 340 W for one minute before vulcanization, was well cross-linked and strongly converted the microwaves to heat. FCBcF also showed satisfactory mechanical properties with reduced cost of raw materials and reduced the curing time by 50% per round. The results demonstrate that pre-heating of FCBcF prior to vulcanization reduces the time and cost of fabricating FCBs, providing long-term economic and environmental benefits.

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“…Energi disipasi gelombang mikro merepresentasikan energi absorbsi yang diubah dalam bentuk energi panas pada bahan dielektrik. Pada saat yang sama temperatur akan dihasilkan dengan perubahan sifat dielektrik [9].…”

Section: Pendahuluanunclassified

“…Pada pemodelan ini diasumsikan menggunakan magnetron sebagai sumber pembangkit gelombang mikro, beroperasi pada frekuensi 2,45 GHz, dengan tipe MICRO DENSHI UM-1500 yang berdaya1.5 kW [10] dan MEGA LP 320 yang berdaya 500 W [11], pada modus TE 11 . Gelombang akan ditransmisikan sepanjang arah sumbu Z melalui pandu gelombang silindrik sepanjang 1000 m, dengan diameter 4 inci, dengan kedalaman minyak mentah pada 20 cm bertemparatur 200…”

Section: Metodologiunclassified

Penentuan Kelayakan Fungsi untuk Pemodelan Pemanasan Minyak Mentah menggunakan Energi Gelombang Mikro

Yustiana

Muntini

Pramono

2014

JFA

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IntisariTingginya kebutuhan supply energi menuntut terus dikembangkannya teknologi pengolahan minyak bumi. Salah satu proses penting di dalam pengolahan minyak bumi adalah proses pemanasan, yang secara konvensional dapat mereduksi hasil produksi minyak bumi. Penelitian ini bertujuan untuk membuat pemodelan pemanasan minyak mentah menggunakan energi gelombang mikro di dalam suatu pipa sumur minyak. Teknik pemanasan ini selain bertujuan untuk menurunkan viskositas dan mengurangi jumlah partikel residu, juga untuk meminimalkan biaya produksi. Data sekunder yang diperoleh kemudian dimodelkan dan dianalisa menggunakan parameter NSD (Normalisasi Square Deviation) untuk menentukan kelayakan fungsi. Hasil yang diperoleh bahwa leyakan fungsi untuk pemodelan menunjukkan bahwa temperatur minyak dari permukaan pipa sampai dengan kedalaman sumur menurun secara eksponensial. Temperatur minyak dari pusat silinder sampai ke tepi pipa menurun secara sinusoidal. Untuk sumber gelombang mikro dengan daya 500 W dan waktu 10 s dihasilkan temperatur maksimum 385• C. ABSTRACTDue to the high demand of energy supply, a development in petroleum processing technology is required. One of the important processes in the petroleum processing is the heating process, which conventionally can reduce the oil production. This study aims to create a real-time modeling of crude oil heating process using microwave energy in an oil well pipe. In addition, this heating technique aims to reduce the viscosity and reduce the amount of residual particles, as well as to minimize the production cost. The secondary data were obtained, and subsequently being modeled and analyzed using NSD parameter (Normalized Square Deviation) to determine the feasibility of the function. Modeling results indicate that the temperature of the oil from the surface to the depth of the well pipe decreases exponentially. While the oil temperature from the center to the edge of the cylindrical pipe decreases sinusoidally. The microwave source has a power of 500 W and a maximum temperature produced of 385 • C in 10 s.KATA KUNCI: pemodelan, minyak mentah, pemanasan, energy gelombang mikro,kelayakan model.

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A numerical and experimental investigation of the modeling of microwave heating for liquid layers using a rectangular wave guide (effects of natural convection and dielectric properties)

Cited by 121 publications

References 10 publications

Microwave Heating of Liquid Foods

Microwave Heating of Liquid Foods

Optimizing the Properties of Vulcanized Compounds for Foodstuff Conveyor Belts in Industrial Microwave Per-Heating

Penentuan Kelayakan Fungsi untuk Pemodelan Pemanasan Minyak Mentah menggunakan Energi Gelombang Mikro

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