CAJ | 학술논문

吸附天然气储罐的放气行为与其实际应用密切相关，因而对此研究具有重要意义。描述该过程的数学模型是含积分约束条件的发展型偏微分方程组，其中的积分约束方程较难处理。针对文献中其他求解方法的不足，本文基于线上方法，采用正交配置离散空间变量，无需对模型本身另作特别处理，用Radu积分式即可以很容易地处理积分约束方程，并用DASSL软件求解所得隐式常微分方程组，解法方便、快捷、稳定。通过模拟计算分析了改善储罐放气性能的途径。指出增加床层导热系数并非改善放气性能的有效方法，而采用给罐壁加热的方式较易消除吸附热效应对放气过程的不利影响。
흡부천연기저관적방기행위여기실제응용밀절상관，인이대차연구구유중요의의。묘술해과정적수학모형시함적분약속조건적발전형편미분방정조，기중적적분약속방정교난처리。침대문헌중기타구해방법적불족，본문기우선상방법，채용정교배치리산공간변량，무수대모형본신령작특별처리，용Radu적분식즉가이흔용역지처리적분약속방정，병용DASSL연건구해소득은식상미분방정조，해법방편、쾌첩、은정。통과모의계산분석료개선저관방기성능적도경。지출증가상층도열계수병비개선방기성능적유효방법，이채용급관벽가열적방식교역소제흡부열효응대방기과정적불리영향。
The performance of adsorptive natural gas storage systems during discharge is im portant in view of the commercial application. However, the simulation model con sists of evolutionary partial differential equations, coupled with an integral c onstraint equation is difficult to be solved. A new strategy is proposed in orde r to overcome the drawbacks involved in the previous solution methods. On the ba sis of numerical method of lines the spatial variables are discretized using ort hogonal collocation. The integral constraint equation can be dealt with using Ra du quadrature without any special reformulation of the model, and a set of resul ting implicit time-derivative ODEs are solved with the software DASSL. It is sho wn that this method is convenient, fast and stable. Furthermore, a series of sim ulations are employed on enhancing the performance of the storage cylinders. The simulation results reveal that increasing heat conductivity of adsorbent bed is not a feasible approach to improve the performance, while maintaining the wall cylinder at moderate temperatures can effectively offset the performance loss.