Thermodynamic Design of a Movable Small Scale Non-flammable Mixed-refrigerant Air/Oxygen Liquefier

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Wang, Haocheng^1^2 ; Guo, Hao^1 ; Zhao, Yanxing^1 ; Chen, Gaofei^1 ; Gong, Maoqiong^1

Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry (TIPC) Chinese Academy of Sciences (CAS), Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Component selection;    Field conditions;    Figure of merit (FOM);    Mixed refrigerants;    Oxygen generators;    Performance analysis;    Process configuration;    Specific power consumption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012007/pdf
DOI  :  10.1088/1757-899X/502/1/012007

来源: IOP

【 摘 要 】

The thermodynamic design of a small scale air/oxygen liquefier is presented in this paper, which could be a low-cost choice under remote and field conditions. Feed gas is liquefied by a dual mixed-refrigerant (DMR) J-T process driven by single-stage compressors. Low pressure (2. Component selection, process configuration design and performance analysis are studied. Ne-N2-Ar-Freon mixtures are employed as the refrigerant. For air liquefaction, simulated specific power consumption (SPC) of 0.73 kWh L-1 and figure of merit (FOM) of 24.76% are achieved. For O2 liquefaction, simulated SPC of 0.71 kWh L-1 and FOM of 27.90% are reached.