Abstract: The gas resistance characteristics in a heat storage packed ball bed was studied by cold state experiments, the effects of gas velocity, diameter of packed balls, height of packed bed and voidage on pressure drop in the bed were examined, and two coefficients in revised Ergun formula were drawn out. The results show that the gas resistance loss of packed bed rises with the increase of gas velocity, and they have a quadratic relationship. With regression analysis on the resistance coefficient, two coefficients in revised Ergun formula are obtained, f1=331.9, f2=1.402, respectively. The calculated unit pressure drop values based on the revised resistance coefficients agree well with the experimental values.

Key words: packed bed, heat storage ball, pressure drop, gas resistance, Ergun formula

摘要： 通过冷态实验研究蓄热小球填充床的气体阻力特性，考察了气体流速、小球直径、堆积球层高度、空隙率对阻力损失的影响，得到了修正的Ergun公式系数. 结果表明，填充床中气体的阻力损失随气体流速增大而增大，呈二次方关系；对阻力系数回归，得到修正的Ergun公式系数f1=331.9, f2=1.402，由此计算的单位压降与实验值最接近.

关键词: 填充床, 蓄热小球, 压降, 气体阻力, Ergun公式