蓄冷球堆积床动态放冷性能研究  

Study on dynamic discharging performance of packed bed using cool storage capsules

作　　者：吴双茂[1] 方贵银[1] 张曼[1] 刘旭[1] 

机构地区：[1]南京大学物理系,南京210093

出　　处：《低温与超导》2008年第10期39-43,64,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金项目(50776043);国家"863"项目(2006AA05Z222)资助

摘　　要：根据蓄冷球和载冷剂之间的能量平衡,并考虑载冷剂与蓄冷球之间的换热系数变化、载冷剂的导热、蓄冷球堆积床热损失的影响,建立了蓄冷球堆积床放冷过程的数理模型。采用数值计算方法模拟了蓄冷球堆积床的放冷过程,并讨论载冷剂流速、载冷剂入口温度以及堆积床孔隙率对放冷过程中载冷剂出口温度和放冷量的影响。According to the energy balance between the cool storage capsules and coolant, a dynamic discharging processes model of packed bed using cool storage capsules was established. It was considered that change of heat transfer coefficient between cool storage capsules and coolant, heat conduction of coolant and heat loss of packed bed. The discharging process of packed bed was simulated using numerical method. It was discussed that the inlet temperature, flow velocity of coolant and void fraction of packed bed had an influence on the outlet temperature of coolant and discharging capacity of packed bed during the discharging process.

关 键 词：蓄冷球 堆积床 放冷性能 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程] P642.23[天文地球—工程地质学]