Investigation and modeling of temperature changes in food heated in a flatbed microwave oven
Investigation and modeling of temperature changes in food heated in a flatbed microwave oven
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DOI：
10.1016/j.jfoodeng.2014.01.028
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发表时间：
2014-06
影响因子：
5.5
通讯作者：
Shixiong Liu;Yoshiko Ogiwara;M. Fukuoka;N. Sakai
中科院分区：
文献类型：
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作者：
Shixiong Liu;Yoshiko Ogiwara;M. Fukuoka;N. Sakai
平板微波炉与装有转盘的微波炉不同，它在腔内有一个固定的陶瓷板，这为矩形或较大的盘子提供了更多的空间，而且更容易清洁。这款新设计的微波炉包含一个铝制天线，底部有不规则形状的孔，在加热时旋转，以实现相对均匀的加热。因此，复杂的结构增加了加热过程建模的难度，目前尚无这方面的资料。通过观察不同食品加工过程中的温度分布，研究了家用平板微波炉的加热特性。建立了考虑加热过程中天线旋转的电磁场与传热耦合预测食品温度分布的有限元计算模型。提出了利用几何模型和食物介电特性优化模拟以减少计算时间的方法。结果表明，材料A的相对均方根误差（theRRMSE）和最大相对误差（mre）值分别为2.27%和6.53%，材料B为1.92%和5.88%。
The flatbed microwave oven, unlike a turntable-equipped one, has a stationary ceramic plate inside the cavity, which allows more space for rectangular or larger dishes and is easier to clean. This newly designed microwave oven contains an aluminum antenna with irregularly shaped holes in the base that rotates during heating to achieve relatively uniform heating. Therefore, the complex configuration increases the difficulty of modeling the heating process, and no information has been available on this.This study investigated the heating characteristics of the domestic flatbed microwave oven by observing the temperature distributions in different foods during processing. A computational model based on the finite element method was also successfully established for predicting the temperature distributions in food by coupling an analysis of the electromagnetic field and heat transfer with a consideration of the rotation of the antenna during heating. Methods for optimizing the simulations to minimize the computational time using a geometric model and the food’s dielectric properties were proposed. Finally, the simulations were compared with the experiments, and theRRMSE(relative root mean square error) andMRE(maximum relative error) values (material A of 2.27% and 6.53%, material B of 1.92% and 5.88%) demonstrated that they are in good agreement.