Experimental study on heat storing and release properties of fluidized bed regenerative device

Abstract

By using the fluidization technique and electromagnetic heating technique, this paper designed a new type solid electric regenerative device using quartz sand particles to store heat, completed the setting of experimental bench of fluidized bed regenerative device, and analyzed the heat storing and release properties of this regenerative device. The experimental results show that the fluidized bed regenerative device has a good heat storing and release performance. When the metal wall surface of regenerative device was heated by electromagnetic heating to 600 ${}^{\circ }$ C and later kept at this temperature, the heat storing temperature of quartz sand particle material can reach above 500 ${}^{\circ }$ C after storing heat for 12 hours. After the 12-hour heat storing was finished, the total power of regenerative device’s heat storage obtained according to the temperatures of measuring points in fluidized bed and the physical properties of quartz sand can satisfy the design requirement. The 12-hour total effective heat release of this device is 29.5 kW $\cdot$ h and its heat release per unit time is kept at 2–3 kW, indicating that this device has a stable and controllable heat release process and is of actual application value.