FC72-氮气混合气体流动冷凝效率研究

混合气体（可凝蒸气与不可凝气体）相对于纯可凝蒸气，其流动冷凝过程更为复杂，冷凝效率受不可凝气体的浓度及冷凝温度影响.为对空间任务蒸发冷凝实验平台排放的废气FC72进行清理回收，针对所研制的FC72气液分离与收集器，在地面环境下对不同浓度的混合气体在不同冷凝温度下进行了流动冷凝效率实验.结果表明，对于FC72与氮气的混合气体，当冷凝器温度一定时，随着FC72浓度的增加，该气液分离与收集器的冷凝效率提高.在冷凝器温度约为-10℃，FC72浓度高于70%时，流动冷凝效率达到80%以上；当冷凝器温度降低至约-13℃，FC72浓度高于30%时，流动冷凝效率达到70%以上；当冷凝器温度降至约-15℃，FC72浓度高于20%时，流动冷凝速率均达到60%以上. 

Study on the Flow Condensation of Mixed Gases of FC72 and Nitrogen

The flow condensation of mixed gases, compared with pure condensable vapors, is far more complicated. Its condensation rate is influenced by the concentration of the non-condensable gas and the condensing temperature. To deal with the FC72 vapor emitted from the evaporation and condensation experiments of the cargo spaceship, a gas-vapor separator and collector is designed, and an experiment system is set up to investigate its performance. The experiment results show that, on condition that the condenser temperature is constant, the condensation rate is increasing as the concentration of FC72 increasing. As the condenser temperature is approximate -10℃, -13℃, and -15℃, and the concentration of FC72 vapor is higher than 70%, 30%, and 20%, the condensation rate can reach 80%, 70%, and 60%, respectively.