基于分布参数模型的CO_2蒸发器结构参数研究  

Study on the configuration parameters for CO_2 evaporator based on distributed parameter model

作　　者：范晓伟[1] 张仙平[2] 王凤坤[1] 马强[1] 沈恒根[3] 马富芹[1] 

机构地区：[1]中原工学院,郑州450007 [2]东华大学,上海201620 [3]河南工程学院,郑州450007

出　　处：《低温与超导》2008年第8期63-69,共7页Cryogenics and Superconductivity

基　　金：河南省高校新世纪优秀人才支持计划项目;河南省科技攻关项目(0524440040)

摘　　要：在设计工况下,建立了用于跨临界二氧化碳热泵热水器的套管式蒸发器的稳态分布参数模型,对其结构参数进行了敏感性分析,指出了它们的合理变化范围:管内套1根管时,内管外径应至少大于11.00mm,低于13.00mm,外管内径应在20.00mm以上,23.00mm以下;管内套多根管时,以管内套3根管的性能为最优。优化设计结果对开发二氧化碳蒸发器产品具有一定的指导意义。Under the design condition, a steady state distributed parameter model of coaxial evaporator applied in carbon dioxide transcritical heat pump water heater was established. Based on this model, sensitivity analysis of evaporator performance to its configuration parameters was carried out. According to the simulation results, it is suggested that when one tube in a tube is designed, the outer diameter of inner tube should be at least greater than 11.00mm and lower than 13.00mm, the inner diameter of outer tube is between 20.00mm and 23.00mm. For many tubes in a tube, three tubes in a tube show the best characteristics. The results of optimization design are expected to offer useful guidelines for evaporator design and its development.

关 键 词：分布参数模型 蒸发器 跨临界循环 CO2热泵热水器 

分 类 号：TQ051.62[化学工程] TM726[电气工程—电力系统及自动化]