排队论在垃圾转运站设备优化配置中的应用

Application of Queuing Theory in the Optimal Allocation of Equipment in Waste Transfer Station

根据对垃圾收集运输过程随机动态特征的分析,提出了一种以排队论为基础的转运站设备配置方法。通过引入M/M/S排队模型,构建了垃圾转运站排队服务系统费用模型,以系统总费用最小来进行转运站压缩设备的配置,并以重庆市某垃圾转运站为例进行了实例分析。结果表明,与传统静态方法相比,采用排队论方法进行转运站设备配置,垃圾转运站系统的总费用可降低7.5%,垃圾收集车辆的平均逗留时间系数由0.16降为0.1,车辆排队长度系数由4.47降低为2.71,转运系统具有更好的经济性和抗风险能力,达到优化配置的目的。

Optimal allocation of equipment in waste transfer stations can make the transfer system more steady and economically. Traditional allocation of equipment in waste transfer stations is a static method. Based on the analysis upon stochastic dynamic characteristics in waste collection and transportation process, a method for equipment allocation on the basis of queuing theory is proposed. With the introduction of the M/M/S queuing model, a cost model of queuing system in transfer stations was formulated ,which allocated compression equipment with the least total cost of system. The new model was applied to a large scale waste transfer station to be built in Chongqing as a practical example. The result shows that, compared with the traditional static method, the queuing method can reduce the total cost of transfer station system by 7.5%, the collection vehicles＇ average waiting time descends from 0.16 to 0.1, the vehicle queue length from 4.47 to 2.71 and also improving the anti-risk capacity of transfer systems.