开发系统水头曲线是一项重要的工作 相对简单的抽水过程 在两侧都有一个油箱的系统 泵的吸入和排出侧。 然而，由于当前的液压系统 模型工作的基本前提是 需求是固定的，比如创造 系统水头曲线不能产生精确的 复杂封闭系统的结果 无排放侧油箱。在本文中 作者介绍了一种改进的方法 纠正这个缺点。 本文中描述的模型由 准确捕捉压力的关系 与用户水龙头的需求相比。工程师 操作员可以使用此模型进行选择 新泵和识别泵中的低效率 现有的泵操作。头部比较 带和不带排放侧的系统曲线 坦克显示头部曲线是 更陡，系统的变化范围更广 如果没有排放侧罐，那么 两种泵的选择都要考虑 以及操作控制的设置。包括9个参考文献、图表。

Development of system head curves is a relatively straightforward process for pumping systems that have a tank on both the suction and discharge side of the pump. However, because the current hydraulic models work on the basic premise that demands are fixed, such methods for creating system head curves do not produce accurate results for complex, closed systems with no discharge-side tank. In this article, the authors introduce a method developed to rectify this shortcoming. The model described in this article works by accurately capturing the relationship of pressure versus demand at water consumers' taps. Engineers and operators can use this model in selecting new pumps and identifying inefficiencies in existing pump operations. Comparisons of head curves for systems with and without discharge-side tanks indicated that head curves were steeper and exhibited wider variation for systems with no discharge-side tank, a factor that should be taken into consideration in both pump selection and setup of operational controls.Includes 9 references, figures.