颗粒床Ergun方程的温度修正OA

Packed granular beds are widely used in industrial processes such as high-temperature gas purification,heterogeneous catalysis,energy storage,and waste heat recovery.Accurate prediction of the resistance(pressure drop)of fluid flowing through a packed bed is crucial for assessing the energy consumption and determining the operating status of related equipment.Cold-model experiments using a spherical zeolite adsorbent as the bed material were first conducted to investigate the effects of key parameters,including the superficial gas velocity(0.2 m/s≤u≤0.8 m/s),the bed depth(100 mm≤H≤500 mm),and the particle characteristic size(1.0 mm≤dp≤2.5 mm),on the bed pressure drop.The resistance coefficients of Ergun equation for this material system were determined as k1=69.1 and k2=1.36.Furthermore,the influence of bed temperature on resistance was examined within the range of 298 K to 1073 K.The results indicated significant deviations when the room-temperature Ergun equation was directly applied to calculate the bed resistance under elevated temperatures.Temperature correction factors(T/T0)for the resistance coefficient were proposed to modify the Ergun equation.The temperature-modified Ergun equation effectively quantifies the differential impact of temperature on the two resistance components,with a maximum relative error of 8.9%.