基于离散事件模拟的热网快速动态热力仿真  

Fast Dynamic Thermal Simulation of Heating Network Based on Discrete Event Simulation

作　　者：王海超[1,2] 谢子蝉 Risto Lahdelma 华鹏敏 周扬 WANG Haichao;XIE Zichan;Risto Lahdelma;HUA Pengmin;ZHOU Yang

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024 [2]阿尔托大学科学学院,芬兰艾斯堡11100

出　　处：《煤气与热力》2023年第11期8-14,共7页Gas & Heat

基　　金：国家重点研发计划中芬政府间国际科技合作项目“基于数字孪生的供热系统全网动态优化及低碳智慧调控关键技术研究”(2021YFE0116200)。

摘　　要：提出一种供热管道动态热力仿真方法。该方法基于拉格朗日方法,采用离散事件模拟(Discrete Event Simulation,DES)跟踪沿管道传输的水力前沿,是首次将DES应用于供热管道动态仿真的研究。该方法考虑了水在管道中的热损失和时滞,可以处理不同的入口温度和流量,包括零流量。对管道内的温度传播进行了详细计算,通过案例利用测量数据对模型进行验证。水在管内的1个流动状态变化视为1个事件,供热管网运行是多个连续事件的组合,事件可以被创建、修改,甚至删除,即事件序列(Event Quene,EQ)可根据事件驱动阈值更新。仿真的时间步长可根据事件发生与否以及发生的时间间隔自适应变化,空间步长也可变。该方法的计算量比传统方法要小。该方法可在变入口温度和流量的基础上,精确地计算出口水温、沿管道的温度分布和热损失。A fast dynamic thermal simulation method for heating pipeline is presented.This method is based on the Lagrangian method and uses Discrete Event Simulation(DES)to track the hydraulic front transmitted along the pipeline.It is the first study to apply DES to the dynamic simulation of heating pipelines.This method considers the heat loss and time delay of water in the pipeline,and can handle different inlet temperatures and flow rates,including zero flow rate.The temperature propagation inside the pipeline is calculated,and the model is validated using measurement data through case studies.The change of a flow state of water in the pipeline is regarded as an event,and the operation of the heating network is a combination of multiple continuous events.Events can be created,modified,or even deleted,that is,the Event Quene(EQ)can be updated according to the eventdriven threshold.The time step of DES simulation can be adaptively changed according to whether the event occurs and the time interval,and the time step is also variable.This method requires less computation than traditional methods.On the basis of variable inlet temperature and flow rate,the outlet water temperature,temperature distribution and heat loss along the pipeline can be calculated accurately.

关 键 词：离散事件模拟 变时间步长 供热管道 动态热力仿真 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]