车用天然气吸附存储系统的吸附动力学

天然气吸附过程的热效应严重影响天然气的吸附量,是吸附储存天然气汽车走向应用的一大障碍.为减小热效应的影响,建立车用天然气储罐吸附过程的数学模型并用SIMPLER算法进行求解,以充气60s和180s为条件进行计算,得到以下结论:60s和180s充气对应的充气质量分别为2.1389kg和2.1723kg;充气效率分别比等温充气减少45.15%和44.29%;吸附剂平均温度分别升高74.76K和72.72K.可见,吸附放热对充气效率有很大影响,必须采取适当的措施减小热效应的不利影响.

Dynamics of natural gas adsorption storage system for vehicles

To reduce the influence of thermal effect produced during the charge process of natural gas,which can be used as vehicular fuel,a mathematical model of natural gas storage system was established and solved by algorithm of SIMPLER with the charge time of 60 s and 180 s.The results revealed that charge amounts were 2.138 9 kg and 2.172 3 kg for the charge time of 60 s and 180 s,the charge performance loss approached 45.15% and 44.29% compared with isothermal charge,and the average temperature rise of the system were 74.76 ℃ and 72.72 ℃,respectively.It can be concluded that the charge performance is adversely affected by thermal effect,so some measures must be taken to alleviate it.