基于移动热源出救的供热系统事故工况优化调度研究

发布时间：2018-07-07 21:03

本文选题：移动热源 + 供热事故　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：热网事故发生的随机性与不可避免性增加了事故预防的困难度,而移动热源的出现很好的解决了能源在时间与空间上的匹配问题,可以作为供热系统事故工况下的辅助热源。然而,目前移动热源的容量较小,我国对在事故工况下以移动热源为辅助的抢修应用较少。所以,如何建立以移动热源为辅助供热的出救模型,优化移动热源在事故发生时的出救容量,是目前急需解决的问题。本文基于以移动热源为辅助供热建立了事故工况下的供热系统运行调度模型,得到热源位置不同时多热源联合供热系统联网运行与解列运行方案,分析了阀门位置的改变对移动热源出救容量的影响。对移动热源在事故抢修中的应用提供相应的理论指导。首先,根据目前市场上应用的蓄热式移动供热和锅炉式移动供热的优缺点,本文首先分析研究了两种形式移动热源的应用范围和工作原理。理论分析了单热源枝状管网与单热源环状管网在发生事故时,基于移动热源辅助供热对系统可靠性的影响。根据枝状管网的特点,以及循环水泵扬程的确定原则,计算得到在最不利用户区域处解列热负荷对系统限额供热系数的影响最大。其次,对多热源环状管网进行建模分析。在管网原有阀门的基础上,对管网进行独立区的划分,确定事故工况下解列运行的关阀方案集。理论分析环状管网的特点,确定事故工况下的联网运行方案。在不低于最低限额供热系数值的前提下,以“移动热源的出救容量最小”为目标函数,建立热网系统在事故工况下的优化运行数学模型。并且根据水力汇流点的特殊作用,分析在热网系统正常运行工况水力汇流点附近增加阀门的设置,对移动热源出救容量的影响。最后,基于模型案例分析了热源位置不同时多热源联合供热系统联网运行与解列运行的优化运行方案,验证计算方案的可行性。在实际工程案例中,通过模型计算对事故工况下移动热源的配置台数进行选择。
[Abstract]:The randomness and inevitability of heat network accidents increase the difficulty of accident prevention, and the emergence of moving heat sources can solve the problem of energy matching in time and space, and can be used as auxiliary heat sources in heating system under accident conditions. However, at present, the capacity of moving heat source is relatively small, and there are few emergency repair applications in China which are assisted by moving heat source under accident conditions. Therefore, how to set up the rescue model with moving heat source as auxiliary heating, and how to optimize the rescue capacity of moving heat source at the time of accident, is an urgent problem that needs to be solved at present. In this paper, based on the moving heat source as the auxiliary heating source, the operation and scheduling model of the heating system under the accident condition is established, and the network operation and de-listing operation scheme of the multi-heat source combined heating system with different heat source positions are obtained. The influence of valve position on the rescue capacity of moving heat source is analyzed. It provides corresponding theoretical guidance for the application of moving heat source in accident repair. Firstly, according to the advantages and disadvantages of regenerative mobile heating and boiler mobile heating, this paper firstly analyzes the application scope and working principle of two kinds of moving heat sources. In this paper, the influence of auxiliary heating based on moving heat source on the reliability of single heat source branch pipe network and single heat source ring pipe network is analyzed theoretically. According to the characteristics of the branch pipe network and the principle of determining the lift of the circulating water pump, it is found that the heat load at the most unfavorable user area has the greatest influence on the heating coefficient of the system. Secondly, the multi-heat source ring pipe network is modeled and analyzed. On the basis of the original valve of the pipe network, the independent zone of the pipe network is divided, and the set of closing valve schemes for unlisting and running under the accident condition is determined. The characteristics of annular pipe network are analyzed theoretically, and the network operation scheme under accident condition is determined. Under the premise of not less than the minimum limit heating coefficient value, the mathematical model of optimal operation of heat network system under accident condition is established with the objective function of "minimum rescue capacity of moving heat source". According to the special function of the hydraulic confluence point, the effect of adding valve near the hydraulic confluence point in the normal operation condition of the heat network system is analyzed, and the influence of the valve on the rescue capacity of the moving heat source is analyzed. Finally, based on the model case, the optimal operation scheme of multi-heat source combined heating system with different heat source locations is analyzed, and the feasibility of the calculation scheme is verified. In the actual engineering case, the allocation of moving heat source under accident condition is selected by model calculation.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU995

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