船用跨临界CO_2引射制冷系统动态性能研究  

Research on dynamic simulation of marine transcritical CO_2 ejector expansion refrigeration system

作　　者：周爱民[1] 朱求源[1] 余涛[1] 段晨[1] 张早校[2] 

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064 [2]西安交通大学化工学院,陕西西安710049

出　　处：《舰船科学技术》2016年第9期126-129,共4页Ship Science and Technology

摘　　要：针对船用跨临界CO_2两相流引射制冷系统建立动态模型,模型中蒸发器采用移动边界模型,气冷器采用集总参数模型,引射器使用1-D恒压混合模型。通过Matlab计算动态模型,分析系统各参数在压缩机转速、膨胀阀开度及引射器尺寸阶跃扰动下的动态响应。模拟结果显示系统对压缩机转速变化更加敏感,系统参数耦合作用强,并且动态响应中存在逆向响应。本文研究为控制器设计提供了依据和指导。This paper firstly establishes the dynamic simulation model for marine transcritical CO2 two-phase ejector expansion refrigeration system with Matlab softwareincluding the evaporator using the moving boundary model, the gas cooler using the lumped parameter model and the ejector using the 1-D constant pressure hybrid model. The dynamic response is analyzed under the step disturbances of system parameters including the compressor＇s speed, the expansion valve＇s opening degree and the ejector＇s dimension to be turbulent in by means of Matlab＇s calculation dynamic model. The simulation results indicate that the compressor＇s speed status is more sensitive than other system parameters, and the couple action of system parameters are powerful. Also the system dynamic response exists the reverse case. This paper provides the reference for controller design.

关 键 词：跨临界 引射制冷系统 动态性能 二氧化碳 

分 类 号：TB66[一般工业技术—制冷工程]