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目的在环控生保系统设计初期通过系统仿真的手段完成物质流计算以及方案验证与评估,为后续设计提供数据支撑。方法针对一类典型的基于物化再生技术的环控生保系统建立了动态过程模型,并进行了仿真。其中,包括密闭舱大气环境变化模型、航天员代谢过程模型、电解制氧过程模型、CO2去除过程模型、缓冲池模型(水箱、气瓶等)以及各控制算法(压力控制算法、电解制氧工作流程、CO2去除工作流程等)。结果仿真结果表明,当水处理子系统每天生成电解水的能力应不小于3.14 kg/d,密闭舱总压不会小于87 Kpa,氧分压稳定在21至23 Kpa之间,水闭合程度不大于77%。结论仿真结果真实、准确的展示了基于物化再生技术的环控生保系统内物质流动态转移过程以及密闭舱内大气总压、氧分压以及CO2分压的动态变化过程,为方案验证提供了有力的数据支撑。
Aim To accomplish the material flow calculation and scheme verification and evaluation by means of system simulation at the initial stage of the design of environmental protection and life insurance system to provide data support for subsequent design. A dynamic process model is established and simulated based on a typical environmental protection system based on physicochemical regeneration technology. Among them, it includes the atmospheric environment change model of airtight compartments, the astronaut metabolic process model, the electrolysis oxygen process model, the CO2 removal process model, the buffer tank model (water tank, gas cylinder, etc.) and various control algorithms (pressure control algorithm, Process, CO2 removal workflow, etc.). Results The simulation results show that when the water treatment subsystem generates electrolyzed water every day, its capacity should not be less than 3.14 kg / d, the total pressure in the closed compartment should not be less than 87 Kpa, the partial pressure of oxygen should be stable between 21 and 23 Kpa, Greater than 77%. CONCLUSIONS The simulation results show the dynamic process of the material flow transfer and the atmospheric total pressure, oxygen partial pressure and partial pressure of CO2 in the closed loop control system, Data support.