2004 Fiscal Year Final Research Report Summary
Development of Simulator for Microwave Thawing and Heating
| Project/Area Number |
15500534
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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 |
Eating habits, studies on eating habits
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| Research Institution | Tokyo University of Marine Science and Technology (2004)
東京水産大学 (2003) |
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Principal Investigator |
SAKAI Noboru Tokyo University of Marine Science and Technology, Food Science and Technology, Professor, 海洋科学部・海洋食品科学科, 教授 (20134009)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Manabu Tokyo University of Marine Science and Technology, Food Science and Technology, Assistant Professor, 海洋科学部, 助手 (30277850)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Microwave Heating / Dielectric Properties / Temperature Distribution Analysis / Uneven Heating / Simulator / Model Food for Microwave Heating |
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| Research Abstract |
At present, the frozen food has been rapidly increased, and it is thawed by the microwave oven which causes uneven heating. In the case of microwave heating or cooking, since the heating-ness of food is changed with the salt concentration, the uneven heating may be occurred. In this research, in order to control the uneven heating, the simulator for predicting the temperature distribution during microwave heating of the food was developed.
In the 2003 fiscal year, the model food with optional dielectric properties was developed, and the mathematical model was developed in order to obtain internal temperature distribution even in the indeterminate form state. In the 2004 fiscal year, the following was examined based on the result in 2004 fiscal year. First of all, the mathematical model developed in the 2003 fiscal year assumed heating and cooking over 0℃, and the thawing process was not considered. Large difference of heating and thawing is that the physical properties such as specific
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heat and thermal conductivity greatly changes and that the latent heat generates at freezing point. In this study, mathematical model was developed using the appearance specific heat model, which does not need to consider frozen and melting layers, and it is possible to use the general heat conduction equation. And the predictive equations of Hayakawa et al. were used in the estimation of physical property with temperature dependence.
Next, the simulator was developed using this mathematical model, and was solved using finite element method. In the simulator, following data is input on the personal computer screen, and the data file necessary for the calculation is made, (1)The shape of sample, (2)The coordinate data for making the element, (3)Information of the thawing process existence, (4)The dielectric characteristic of each element, (5)The thermophysical property values. Temperature distribution was calculated using this data file.
It was confirmed that this simulator was effective, because calculated result by this simulator and measured value, which was obtained using model food, agreed well. Less
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Research Products
(4 results)
