基于智能阀辨识管网阻力数及二次网动态水力平衡研究

Research on Identification of Pipe Network Resistance Number and Secondary Network Dynamic Hydraulic Balance Based on Intelligent Valve

通过具有压力、流量检测功能的楼栋智能阀检测管网流量和压力,基于图论原理进行管网阻力辨识,并进行二次网水力平衡计算。提出了最不利环路的确定方法,实现水泵最佳运行工况。基于智能阀最佳流量调节方式及最小压差控制策略,通过对比动态流量平衡阀、动态压差平衡阀水泵运行控制策略,整个供暖季系统运行能耗节约效率分别为50%和19%。通过分析具备间歇供暖条件的公共建筑,动态水力平衡调节可在原基础上可进一步节约系统运行能耗15%,且相对建筑本身可节约供暖能耗9%,节能空间大。

The flow and pressure are detected by the building intelligent valve with pressure and flow detection functions,the resistance of the pipe network is identified based on the principle of graph theory,and the hydraulic balance calculation of the secondary network is performed.The method of determining the most unfavorable loop is proposed to achieve the best operating conditions of the pump.Based on the optimal flow adjustment method of the intelligent valve and the minimum differential pressure control strategy,by comparing the operation control strategies of the dynamic flow balancing valve and the dynamic differential pressure balancing valve,the energy saving efficiency of the system during the entire heating season is 50%and 19%,respectively.By analyzing public buildings with intermittent heating conditions, dynamic hydraulic balance adjustment can further save system operating energy consumption by 15% on the original basis, and can save heating energy consumption by 9% relative to the building itself, which has huge energy saving space.