航天电子设备开放式冷却系统的稳态仿真  

Steady Simulation of Open Loop Refrigeration System Used for Astronautics Electronic Equipment

作　　者：艾超 AI Chao(School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学,北京100083

出　　处：《计算机仿真》2019年第3期11-14,31,共5页Computer Simulation

摘　　要：针对某航天器上需要短时单独冷却的一套小功率电子设备的冷却问题,为满足系统的简单、可靠、质量轻等要求,设计了一套二氧化碳开放式制冷系统。通过数学建模的方法,建立了系统包括高压储液罐、回热器、电子膨胀阀、冷板在内的主要关键部件的稳态模型,并利用模块化建模的思想,开发出了一套针对于开放式冷却系统的稳态仿真模型库。通过对系统的仿真计算,得出了工质的储存温度、质量流量与冷板表面温度之间的关系。结果表明,电子元件表面温度随着二氧化碳工质的储存温度的降低而降低,随着质量流量的增加而降低,但二者都存在一个最优值。最后得出结论,设计的开放式二氧化碳制冷系统能够满足该电子设备的特殊散热要求,开发的系统的稳态仿真模型库能够为系统的优化和动态仿真提供有力的依据和方向。For the cooling problem of the low-power electronic equipment in a spacecraft,which needs cooling in a short time separately,the author designed an open loop refrigeration system(OLRS)with CO2 as refrigerant to meet the system need of simple,reliable and light.By means of mathematical modeling,a steady mathematical model of main equipment was established,which includes accumulator,heat regenerator,electronic expansion valve and cold plates.The computer simulation model library for OLRS was also developed with the thought of module structure modeling.By the simulation of this system,the relationship of storage temperature,mass flow rate of CO2 fluids with the surface temperature of electronic equipment was indicated.The results shows that the surface temperature of electronic equipment is decreased with the decrease of storage temperature and the increase of mass flow rate of CO2 fluids,but there is an optimal value for both of them respectively.In the final,the conclusions were drawn that the OLRS designed can meet the cooling requirements of this electronic equipment and the computer simulation model library developed can provide solid foundation and directions for the optimal design and dynamic simulation of the system.

关 键 词：开放式冷却系统 数学模型 稳态仿真 

分 类 号：TB69[一般工业技术—制冷工程]