摘要
多冷源环状管网系统维持良好的水力—热力工况,不仅是保证系统安全稳定运行的基本要求,还是发挥多冷源环状管网系统输配灵活性与提升运行表现的关键。然而,由于缺乏对多冷源环状管网系统关键影响因素的认识,导致传统控制策略难以在动态负荷工况下对系统做出适当的调节,进而造成系统长期在水力—热力工况低效、不稳定的状态运行。本研究以北京大兴国际机场多冷源环状管网系统为研究对象,基于Modelica语言,建立并验证了多冷源环状管网系统动态仿真模型;通过理论分析,揭示了多冷源环状管网系统水力—热力工况的关键影响因素——源侧负荷比;基于不确定性分析的方法,以水力不平衡率和热力偏离度为评价指标,进一步验证了源侧负荷比对系统水力—热力工况的显著影响。模拟结果表明;在源侧负荷比的影响下,系统水力不平衡率可高达50%,热力偏离度可高达12℃。同时,最高超过60%以上的工况系统处于水力-热力表现不佳的状态运行。研究结果可为多冷源环状管网系统的水力—热力工况优化与运行策略制定提供参考。
Maintaining good hydraulic-thermal conditions in a multi-cold source looped network system is not only a basic requirement to ensure the safe and stable operation of the system,but also a key to giving full play to the transmission and distribution flexibility and improving the performance of the multi-cold source looped network system.However,due to the lack of understanding of the key factor influencing the multi-cold source ring pipe network system,it is difficult for traditional control strategies to make proper regulation of the system under dynamic load conditions,leading to the inefficient and unstable hydraulic-thermal conditions of the system.In this paper,a dynamic simulation model of the multi-cold source looped network system was established and verified based on Modelica language.Through theoretical analysis,the key influencing factor of the hydraulic-thermal conditions of the multi-cold source looped network system,the source-side load ratio,was identified.Based on the uncertainty analysis,the significant influence of the source-side load ratio on the hydraulic-thermal conditions of the system was further verified by using the hydraulic imbalance rate and the thermal deviation as evaluation indexes.The simulation results show that under the influence of the source-side load ratio,the system hydraulic imbalance rate can be as high as 50%and the thermal deviation can be as high as 12 C.At the same time,as high as 60%of the operating conditions of the system are in a state of poor hydraulic-thermal performance.The results can be used as a reference for the optimization of the hydraulic-thermal conditions and the formulation of the operation strategy of the multi-cold source looped network system.
作者
高成
王丹
王伟
孙育英
谷现良
GAO Cheng;WANG Dan;WANG Wei;SUN Yuying;CU Xianliang(Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing University of Technology,Beijing 100124,China;Faculty of Information Technology,Beijing University of Technology,Beijing 100124,China;School of Safety Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Institute of Architectural Design,Beijing 100045,China)
出处
《建筑科学》
CSCD
北大核心
2023年第4期193-200,共8页
Building Science
基金
国家自然科学基金青年基金项目“多冷源环状区域供冷系统水力-热力动态特性机理与调控方法研究”(52208093)
北京市博士后工作经费资助项目“多冷源环状区域供冷系统动态特性机理及调控方法研究”(2022-ZZ-095)。
关键词
多冷源环状管网
水力—热力工况
关键影响因素
源侧负荷比
不确定性分析
multi-cold source looped network
hydraulic-thermal conditions
key factor
source-side load ratio
uncertainty analysis
