Characteristics of Drying due to Microwave Heating
| Project/Area Number |
08650246
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
AOKI Kazuo Nagaoka University of Technology, Department of Mechanical Engineering, Professor., 工学部, 教授 (60115095)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | MIcrowave Heating / Drying / Rectangular Wave Guide / Packed Beds / Electric and Magnetic Field / Reflection / Multi-layered Structure / 気液二相流 / 毛管力 / 三次元 / 熱物質伝達 |
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| Research Abstract |
Microwave heating is one of the most Interesting methods for heating materials. In this report, the drying of water saturated packed bed and the heating of multi-layered packed beds by using microwave in rectangular wave guide has been investigated theoretically and experimentally.
The results obtained here are summarlzed as follows ;
(1)When microwave is directly applied to a high dielectric material, most of it is reflected on the surface. Setting a relatively low dielectric materials in front of a high dielectric material reduces to the reflection.
(2)In heating of multi-layered packed beds, the reflection rate corresponding to the performance of the heating strongly depends on the dielectrisity and the thickness of the additiuonal material. The predicted results for the reflection rates of microwave and the temperature distributions In the sample are in agreement with the experimental results.
(3)In drying due to microwave heating, the dry layer having a low dielectrisity acts as a layer of avoiding relrection and the temperature in the wet layer arizes and it in the dry layer drops as drying proceeds.
(4)Comparing of the usual dring process using hot air, the drying due to microwave heating has the relatively uniform drying rate.
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Report
(3 results)
Research Products
(11 results)
