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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Varith, J. Noochuay, C. Netsawang, P. Hirunstitporn, B. Janin, S. Krairiksh, M. |
| Copyright Year | 2007 |
| Description | Author affiliation: Dept. of Agric. & Food Eng., Maejo Univ., Chiang Mai (Varith, J.; Noochuay, C.; Netsawang, P.; Hirunstitporn, B.) |
| Abstract | This article presents a design for multimode-circular microwave cavity at 2.45 GHz as a section of vertical-typed microwave oven for agri-food processing. Microwave cavity with a diameter of 100 cm and a height of 25 cm was modeled using $CST2006^{reg}$ commercial software. Finite integral method was performed to solve the model for design criteria including waveguide arrangement to obtain low coupling and uniform distribution, and choke design to minimize microwave leakage. Simulation results show that perpendicular arrangement of two waveguides with 30deg angle apart from each other yielded the minimal mutual coupling. With this waveguide arrangement, microwave power density was linearly loss into the grape model in radial direction from wall toward the center of cavity. Simulated electric field (E-field) distribution agreed with experimental E-field distribution on fresh grape as it was converted into heat captured by thermal imaging camera. The cavity design with three square choke of 31x31 $mm^{2}$ (lambda4) placing with space of 20 mm (lambda6) exponentially attenuated the E-field. Attenuation trend of simulation agreed with experimental that of measurement which was below safety limit of 5 $mW/cm^{2}.$ Findings from this work are useful for the scale-up of multi- section/multi-mode microwave oven suitable for agri-food drying process. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 1573167 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424407484 |
| DOI | 10.1109/APMC.2007.4554804 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-12-11 |
| Publisher Place | Thailand |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Electromagnetic heating Microwave ovens Inductors Pipelines Integral equations Microwave theory and techniques Mutual coupling Resistance heating Microwave imaging Cameras finite integral method microwave oven design agri-food processing |
| Content Type | Text |
| Resource Type | Article |
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