Effective Optimization of Temperature Uniformity and Power Efficiency in Two-ports Microwave Ovens

Microwave assisted chemical reaction is increasingly studied in recent years by using the modified domestic microwave oven to heating on chemical reaction in the laboratory scale study. But the problems of temperature distribution non-uniformity and low power efficiency in the heating process are becoming a new obstacle in the application of microwave chemistry. An optimized microwave oven with two sources is proposed in this paper from the view of feeding system to overcome these disadvantages. As water is usually concerned as important solvent and reactant, a beaker of water is used as heating load in this study. By modeling the process of heating water for 180 s, the standard deviation and the average temperature are compared between the domestic microwave oven and the optimized microwave oven with two sources. As a result, the power is utilized more efficiently as a 20.14% increase can be seen by using the optimized microwave oven under the same microwave power and more uniformity is obtained as a 11.23% increase is performed by the use of the optimized microwave oven under the same heating conditions.