电加热式固体蓄热装置效率的实验研究

In this paper,According to theoretical analysis and experimental research on the process of thermal storage in electric-heated thermal storage device with solid media, the calculation of equivalent rising temperature was proposed in the paper. Based on the relationship between power consumption and equivalent rising temperature, the curve of thermal storage efficiency was summarized. When temperature is below 250℃, the thermal storage efficiency of the device is about 70%. The research shows that the heating element and the sealing property will affect the thermal storage efficiency, which increases first and then decreases with the temperaturerising. The thermal conductivity of solid material also affects the efficiency. To improve the thermal storage efficiency of device, some measures can be taken: a lighter heating element with smaller specific heat capacity; structure with better sealing property.